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Chae HG, Margenot AJ, Jeon JR, Kim MS, Jang KS, Yoon HY, Kim PJ, Lee JG. Linking the humification of organic amendments with size aggregate distribution: Insights into molecular composition using FT-ICR-MS. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 927:172147. [PMID: 38569966 DOI: 10.1016/j.scitotenv.2024.172147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Revised: 03/24/2024] [Accepted: 03/30/2024] [Indexed: 04/05/2024]
Abstract
Soil organic matter (SOM) plays a pivotal role in enhancing physical and biological characteristics of soil. Humic substances constitute a substantial proportion of SOM and their increase can improve crop yields and promote agricultural sustainability. While previous research has primarily assessed the influence that humic acids (HAs) derived from natural water have on soil structure, our study focuses on the impact of HAs on soil aggregation under different fertilizer regimes. During the summer cropping season, maize was cultivated under organic and synthetic fertilizer treatments. The organic fertilizer treatment utilized barley (Hordeum vulgare L.) and hairy vetch (Vicia villosa R.) as an organic amendment five days prior to maize planting. The synthetic treatment included a synthetic fertilizer (NPK) applied at South Korea's recommended rates. The organic treatment resulted in significant improvements in the soil aggregates and stability (mean weight diameter, MWD; p < 0.05) compared to the synthetic fertilizer application. These improvements could be primarily attributed to the increased quantity and quality of HAs in the soil derived from the organic amendment. The amount of extracted HAs in the organic treatment was nearly twice that of the synthetic treatment. Additionally, the organic treatment had a 140 % larger MWD and a 40 % increase in total phenolic content compared to the synthetic treatment. The organic treatment also had an increased macronutrient uptake (p < 0.001), an 11 % increase in aboveground maize biomass, and a 21 % increase in grain yield relative to the synthetic treatment. Thus, the enhancement of HA properties through the incorporation of fresh organic manure can both directly and indirectly increase crop productivity.
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Affiliation(s)
- Ho Gyeong Chae
- Division of Applied Life Science (BK21), Gyeongsang National University, Jinju 52828, Republic of Korea
| | - Andrew J Margenot
- Department of Crop Sciences, University of Illinois Urbana-Champaign, 1102 S. Goodwin Avenue, Urbana, IL 61801, USA; Agroecosystem Sustainability Center, Institute for Sustainability, Energy and Environment, University of Illinois at Urbana-Champaign, 1102 S. Goodwin Avenue, Urbana, IL 61801, USA
| | - Jong-Rok Jeon
- Division of Applied Life Science (BK21), Gyeongsang National University, Jinju 52828, Republic of Korea; Institute of Agriculture and Life Sciences, Gyeongsang National University, Jinju 52828, Republic of Korea
| | - Min Sung Kim
- Digital Omics Research Center, Korea Basic Science Institute, Cheongju 28119, South Korea
| | - Kyoung-Soon Jang
- Digital Omics Research Center, Korea Basic Science Institute, Cheongju 28119, South Korea
| | - Ho Young Yoon
- Division of Applied Life Science (BK21), Gyeongsang National University, Jinju 52828, Republic of Korea
| | - Pil Joo Kim
- Division of Applied Life Science (BK21), Gyeongsang National University, Jinju 52828, Republic of Korea; Institute of Agriculture and Life Sciences, Gyeongsang National University, Jinju 52828, Republic of Korea
| | - Jeong Gu Lee
- Department of Crop Sciences, University of Illinois Urbana-Champaign, 1102 S. Goodwin Avenue, Urbana, IL 61801, USA; Department of Applied Biosciences, Kyungpook National University, Daegu 41566, Republic of Korea.
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Zou H, Wang W, Huang J, Li X, Ma M, Wu S, Zhao C. Soil Nitrogen and Flooding Intensity Determine the Trade-Off between Leaf and Root Traits of Riparian Plant Species. PLANTS (BASEL, SWITZERLAND) 2024; 13:978. [PMID: 38611507 PMCID: PMC11013260 DOI: 10.3390/plants13070978] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Revised: 03/23/2024] [Accepted: 03/27/2024] [Indexed: 04/14/2024]
Abstract
The investigation into trade-offs among plant functional traits sheds light on how plants strategically balance growth and survival when facing environmental stress. This study sought to evaluate whether trade-offs observed at both community and individual species levels could indicate adaptive fitness across an intensity of flooding intensity. The study was conducted at 25 sampling sites spanning approximately 600 km along the riparian zone in the Three Gorges Reservoir area, China. The findings revealed that, along the flooding gradient, the overall riparian community did not exhibit significant trade-offs between leaf and root traits. Examining three broadly distributed dominant species (Cynodon dactylon, Xanthium strumarium, and Abutilon theophrasti), perennial plants showed pronounced trade-offs under low flooding intensity, while annuals exhibited trade-offs under moderate and low flooding intensity. The trade-offs were evident in traits related to nitrogen-carbon resources, such as specific leaf area, root tissue density, and photosynthetic rate. However, under strong flooding intensity, the relationship between leaf and root traits of the species studied was decoupled. Furthermore, the study identified a significant correlation between soil nitrogen and the trade-off traits under moderate and low flooding intensity. Integrating results from the CSR (Competitors, Stress-tolerators, Ruderals) strategy model, species niche breath analysis, and nitrogen-regulated trade-off, the study revealed that, in the face of high flooding intensity, perennial species (C. dactylon) adopts an S-strategy, demonstrating tolerance through a conservative resource allocation that decouples leaf-root coordination. Annual species (X. strumarium and A. theophrasti), on the other hand, exhibit niche specialization along the flooding gradient, employing distinct strategies (R- and C-strategy). As flooding stress diminishes and soil nitrogen level decreases, plant strategies tend to shift towards an R-strategy with a competition for reduced N resources. In conclusion, the study highlighted the pivotal roles of soil nitrogen and flooding intensity acting as the dual determinants of species growth and tolerance. These dynamics of growth-tolerance balance were evident in the diverse trade-offs between leaf and root traits of individual plant species with different life histories, underscoring the array of adaptive strategies employed by riparian plants across the flooding intensity gradient.
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Affiliation(s)
- Hang Zou
- The College of River and Ocean Engineering, Chongqing Jiaotong University, Chongqing 400074, China
- Chongqing Institute of Green Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China
- Chongqing College, University of Chinese Academy of Sciences, Chongqing 400714, China
| | - Wanyu Wang
- Chongqing Institute of Green Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China
- Chongqing College, University of Chinese Academy of Sciences, Chongqing 400714, China
| | - Jinxia Huang
- The College of River and Ocean Engineering, Chongqing Jiaotong University, Chongqing 400074, China
- Chongqing Institute of Green Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China
- Chongqing College, University of Chinese Academy of Sciences, Chongqing 400714, China
| | - Xiaohong Li
- Chongqing Institute of Green Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China
- Chongqing College, University of Chinese Academy of Sciences, Chongqing 400714, China
| | - Maohua Ma
- Chongqing Institute of Green Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China
- Chongqing College, University of Chinese Academy of Sciences, Chongqing 400714, China
| | - Shengjun Wu
- Chongqing Institute of Green Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China
- Chongqing College, University of Chinese Academy of Sciences, Chongqing 400714, China
| | - Cunfeng Zhao
- Chongqing Institute of Green Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China
- Chongqing College, University of Chinese Academy of Sciences, Chongqing 400714, China
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Elshamly AMS, Iqbal R, Elshikh MS, Alwasel YA, Chaudhary T. Chitosan combined with humic applications during sensitive growth stages to drought improves nutritional status and water relations of sweet potato. Sci Rep 2024; 14:6351. [PMID: 38491017 PMCID: PMC10943102 DOI: 10.1038/s41598-024-55904-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Accepted: 02/28/2024] [Indexed: 03/18/2024] Open
Abstract
The current decline in freshwater resources presents a significant global challenge to crop production, a situation expected to intensify with ongoing climate change. This underscores the need for extensive research to enhance crop yields under drought conditions, a priority for scientists given its vital role in global food security. Our study explores the effects of using humic and chitosan treatments to alleviate drought stress during critical growth phases and their impact on crop yield and water efficiency. We employed four different irrigation strategies: full irrigation, 70% irrigation at the early vine development stage, 70% irrigation during the storage root bulking stage, and 85% irrigation across both stages, complemented by full irrigation in other periods. The plants received either humic treatments through foliar spray or soil application, or chitosan foliar applications, with tap water serving as a control. Our findings highlight that the early vine development stage is particularly vulnerable to drought, with a 42.0% decrease in yield observed under such conditions. In normal growth scenarios, foliar application of humic substances significantly improved growth parameters, resulting in a substantial increase in yield and water efficiency by 66.9% and 68.4%, respectively, compared to the control treatment under full irrigation. For sweet potatoes irrigated with 70% water at the storage root bulking stage, ground application of humic substances outperformed both foliar applications of chitosan and humic in terms of yield results. The highest tuber yield and water efficiency were attained by combining chitosan and humic ground applications, regardless of whether 70% irrigation was used at the storage root bulking stage or 85% irrigation during both the early vine development and storage root bulking stages.
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Affiliation(s)
- Ayman M S Elshamly
- Water Studies and Research Complex, National Water Research Center, Cairo, Egypt.
| | - Rashid Iqbal
- Department of Agronomy, Faculty of Agriculture and Environment, The Islamia University of Bahawalpur, Bahawalpur, 63100, Pakistan
| | - Mohamed S Elshikh
- Department of Botany and Microbiology, College of Science, King Saud University, 11451, Riyadh, Saudi Arabia
| | - Yasmeen A Alwasel
- Department of Botany and Microbiology, College of Science, King Saud University, 11451, Riyadh, Saudi Arabia
| | - Talha Chaudhary
- Faculty of Agricultural and Environmental Sciences, Hungarian University of Agriculture and Life Sciences, Godollo, 2100, Hungary.
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Jin Y, Yuan Y, Liu Z, Gai S, Cheng K, Yang F. Effect of humic substances on nitrogen cycling in soil-plant ecosystems: Advances, issues, and future perspectives. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 351:119738. [PMID: 38061102 DOI: 10.1016/j.jenvman.2023.119738] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 11/18/2023] [Accepted: 11/27/2023] [Indexed: 01/14/2024]
Abstract
Nitrogen (N) cycle is one of the most significant biogeochemical cycles driven by soil microorganisms on the earth. Exogenous humic substances (HS), which include composted-HS and artificial-HS, as a new soil additive, can improve the water retention capacity, cation exchange capacity and soil nutrient utilization, compensating for the decrease of soil HS content caused by soil overutilization. This paper systematically reviewed the contribution of three different sources of HS in the soil-plant system and explained the mechanisms of N transformation through physiological and biochemical pathways. HS convert the living space and living environment of microorganisms by changing the structure and condition of soil. Generally, HS can fix atmospheric and soil N through biotic and abiotic mechanisms, which improved the availability of N. Besides, HS transform the root structure of plants through physiological and biochemical pathways to promote the absorption of inorganic N by plants. The redox properties of HS participate in soil N transformation by altering the electron gain and loss of microorganisms. Moreover, to alleviate the energy crisis and environmental problems caused by N pollution, we also illustrated the mechanisms reducing soil N2O emissions by HS and the application prospects of artificial-HS. Eventually, a combination of indoor simulation and field test, molecular biology and stable isotope techniques are needed to systematically analyze the potential mechanisms of soil N transformation, representing an important step forward for understanding the relevance between remediation of environmental pollution and improvement of the N utilization in soil-plant system.
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Affiliation(s)
- Yongxu Jin
- School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin, 150030, China; International Cooperation Joint Laboratory of Health in Cold Region Black Soil Habitat of the Ministry of Education, China
| | - Yue Yuan
- School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin, 150030, China; International Cooperation Joint Laboratory of Health in Cold Region Black Soil Habitat of the Ministry of Education, China
| | - Zhuqing Liu
- School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin, 150030, China; International Cooperation Joint Laboratory of Health in Cold Region Black Soil Habitat of the Ministry of Education, China
| | - Shuang Gai
- School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin, 150030, China; International Cooperation Joint Laboratory of Health in Cold Region Black Soil Habitat of the Ministry of Education, China
| | - Kui Cheng
- International Cooperation Joint Laboratory of Health in Cold Region Black Soil Habitat of the Ministry of Education, China; College of Engineering, Northeast Agricultural University, Harbin, 150030, China.
| | - Fan Yang
- School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin, 150030, China; International Cooperation Joint Laboratory of Health in Cold Region Black Soil Habitat of the Ministry of Education, China.
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Wang S, Xu L, Hao M. Impacts of Long-Term Micronutrient Fertilizer Application on Soil Properties and Micronutrient Availability. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:16358. [PMID: 36498430 PMCID: PMC9736148 DOI: 10.3390/ijerph192316358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 11/30/2022] [Accepted: 12/03/2022] [Indexed: 06/17/2023]
Abstract
Deficiencies of micronutrients in calcareous soils have been reported in different areas of China's Loess Plateau. The objective of this research was to study the influence of the continuous application of micronutrient fertilizers on soil properties and micronutrient availability in this region. The micronutrient fertilizer field plot experiment began in 1984. It included Zn, Mn and Cu fertilizer treatments and the control treatment. The crop system was continuously cropped winter wheat. The soil properties and available Zn, Mn, Cu and Fe were measured. Their relationships were analyzed through correlation and path analysis. After 31 years, the soil pH, CaCO3 and available P levels decreased; in contrast, the organic matter, fulvic acid, reducing substances and soil moisture levels in the surface soil increased in the micronutrient fertilized treatments compared to the control treatment. Cu and Zn fertilizers promoted the available Cu and Zn levels in the surface and deep soil, but available Mn was not significantly affected by Mn fertilizer. It can be seen from the interaction between the micronutrient availability and micronutrient fertilizers that Zn, Cu and Mn fertilizers can increase the available Fe level; Mn fertilizer can increase the available Cu level, and Cu and Mn fertilizers can increase the available Zn level. This means that Fe, Cu and Zn availability were easy to implement, whereas the soil-available Mn was difficult to improve in calcareous soils on the Loess Plateau. Fulvic acid and organic matter showed a significant and direct effect on the available Zn; the available Mn and Fe were mainly affected by the soil CaCO3 and moisture; the available Cu was mainly affected by the soil organic matter, available P and reducing substances. These results indicate the importance of organic matter in calcareous soils; it can not only directly affect the availability of micronutrients but also indirectly affect their availability through the indirect interaction with fulvic acid, reducing substances, available P and CaCO3. The above conclusions suggest that the long-term micronutrient fertilizers changed some important soil properties and increased the micronutrient availability in the loess-derived soil.
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Affiliation(s)
- Shuzhuan Wang
- Key Laboratory of Natural Disaster and Remote Sensing of Henan Province, Nanyang Normal University, Nanyang 473061, China
| | - Lei Xu
- Key Laboratory of Natural Disaster and Remote Sensing of Henan Province, Nanyang Normal University, Nanyang 473061, China
| | - Mingde Hao
- Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Xianyang 712100, China
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Thielicke M, Ahlborn J, Životić L, Saljnikov E, Eulenstein F. Microgranular fertilizer and biostimulants as alternatives to diammonium phosphate fertilizer in maize production on marshland soils in northwest Germany. ZEMLJISTE I BILJKA 2022. [DOI: 10.5937/zembilj2201053t] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The eutrophication of groundwater through widespread diammonium phosphate (DAP) fertilization and excessive farm fertilizer is one of the major problems in European agriculture. Organomineral microgranular fertilizers that have a reduced phosphorus (P) content, alone or in combination with biostimulants, offer promising alternatives to DAP fertilization. We conducted a field experiment with maize (Zea mays) on a marshland soil site in order to compare the yield increase and the phosphorus balance of DAP and microgranular fertilizer variants. P content of the soil on the study site is 3.9 g P per 100 g soil. Treatments involved a combination of two fertilizers, namely DAP or a P-reduced microgranular slow-release organomineral fertilizer (Startec) and the biostimulants mycorrhiza, humic substances and soil bacteria, applied individually or along with two of the above biostimulants. Fertilizer variants were also tested individually without additional biostimulants. One in four plots was used as a control, treated only with biogas slurry, to identify site-specific spatial variability and to implement correction factors to process raw data using standardized methods. Startec performed as well as DAP in terms of both the yield and corn cob ratio, while the P excess was lower in plots treated with Startec (av. = 4.5 kg P2O5 ha-1 ) compared to DAP (av. = 43.7 kg P2O5 ha-1 ). The latter differences are of statistical significance. Individual biostimulants and a combination of multiple biostimulants rarely resulted in significantly higher yields, with the exception of some combinations with humic substances and mycorrhiza in individual years. The influence of the climatic conditions in each of the years was higher than the influence of the biostimulants. However, average increases in yield over three years would be economically beneficial for farmers in the case of the applied humic substances product and mycorrhiza. An adequate alternative to DAP was found in the form of a P-reduced microgranular fertilizer from Startec.
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Koh YS, Wong SK, Ismail NH, Zengin G, Duangjai A, Saokaew S, Phisalprapa P, Tan KW, Goh BH, Tang SY. Mitigation of Environmental Stress-Impacts in Plants: Role of Sole and Combinatory Exogenous Application of Glutathione. FRONTIERS IN PLANT SCIENCE 2021; 12:791205. [PMID: 35003181 PMCID: PMC8728365 DOI: 10.3389/fpls.2021.791205] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Accepted: 11/26/2021] [Indexed: 06/14/2023]
Abstract
Glutathione (GSH; γ-glutamyl-cysteinyl-glycine), a low-molecular-weight thiol, is the most pivotal metabolite involved in the antioxidative defense system of plants. The modulation of GSH on the plant in response to environmental stresses could be illustrated through key pathways such as reactive oxygen species (ROS) scavenging and signaling, methylglyoxal (MG) detoxification and signaling, upregulation of gene expression for antioxidant enzymes, and metal chelation and xenobiotic detoxification. However, under extreme stresses, the biosynthesis of GSH may get inhibited, causing an excess accumulation of ROS that induces oxidative damage on plants. Hence, this gives rise to the idea of exploring the use of exogenous GSH in mitigating various abiotic stresses. Extensive studies conducted borne positive results in plant growth with the integration of exogenous GSH. The same is being observed in terms of crop yield index and correlated intrinsic properties. Though, the improvement in plant growth and yield contributed by exogenous GSH is limited and subjected to the glutathione pool [GSH/GSSG; the ratio of reduced glutathione (GSH) to oxidized glutathione (GSSG)] homeostasis. Therefore, recent studies focused on the sequenced application of GSH was performed in order to complement the existing limitation. Along with various innovative approaches in combinatory use with different bioactive compounds (proline, citric acid, ascorbic acid, melatonin), biostimulants (putrescine, Moringa leaf extract, selenium, humic acid), and microorganisms (cyanobacteria) have resulted in significant improvements when compared to the individual application of GSH. In this review, we reinforced our understanding of biosynthesis, metabolism and consolidated different roles of exogenous GSH in response to environmental stresses. Strategy was also taken by focusing on the recent progress of research in this niche area by covering on its individualized and combinatory applications of GSH prominently in response to the abiotic stresses. In short, the review provides a holistic overview of GSH and may shed light on future studies and its uses.
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Affiliation(s)
- Yi Sze Koh
- Chemical Engineering Discipline, School of Engineering, Monash University Malaysia, Subang Jaya, Malaysia
| | - See Kiat Wong
- Chemical Engineering Discipline, School of Engineering, Monash University Malaysia, Subang Jaya, Malaysia
| | - Nor Hadiani Ismail
- Faculty of Applied Sciences, Universiti Teknologi MARA (UiTM), Shah Alam, Malaysia
- Atta-ur-Rahman Institute for Natural Product Discovery (AuRIns), Universiti Teknologi MARA (UiTM), Puncak Alam, Malaysia
| | - Gokhan Zengin
- Department of Biology, Science Faculty, Selcuk University, Konya, Turkey
| | - Acharaporn Duangjai
- Unit of Excellence in Research and Product Development of Coffee, Division of Physiology, School of Medical Sciences, University of Phayao, Mae Ka, Thailand
- Center of Health Outcomes Research and Therapeutic Safety (Cohorts), School of Pharmaceutical Sciences, University of Phayao, Mae Ka, Thailand
- Unit of Excellence on Clinical Outcomes Research and IntegratioN (UNICORN), School of Pharmaceutical Sciences, University of Phayao, Mae Ka, Thailand
- Unit of Excellence on Herbal Medicine, School of Pharmaceutical Sciences, University of Phayao, Mae Ka, Thailand
| | - Surasak Saokaew
- Unit of Excellence in Research and Product Development of Coffee, Division of Physiology, School of Medical Sciences, University of Phayao, Mae Ka, Thailand
- Center of Health Outcomes Research and Therapeutic Safety (Cohorts), School of Pharmaceutical Sciences, University of Phayao, Mae Ka, Thailand
- Unit of Excellence on Clinical Outcomes Research and IntegratioN (UNICORN), School of Pharmaceutical Sciences, University of Phayao, Mae Ka, Thailand
- Unit of Excellence on Herbal Medicine, School of Pharmaceutical Sciences, University of Phayao, Mae Ka, Thailand
- Department of Pharmaceutical Care, Division of Pharmacy Practice, School of Pharmaceutical Sciences, University of Phayao, Mae Ka, Thailand
| | - Pochamana Phisalprapa
- Department of Medicine, Division of Ambulatory Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Salaya, Thailand
| | - Khang Wei Tan
- School of Energy and Chemical Engineering, Xiamen University Malaysia, Sepang, Malaysia
| | - Bey Hing Goh
- Biofunctional Molecule Exploratory Research Group, School of Pharmacy, Monash University Malaysia, Subang Jaya, Malaysia
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China
| | - Siah Ying Tang
- Chemical Engineering Discipline, School of Engineering, Monash University Malaysia, Subang Jaya, Malaysia
- Tropical Medicine and Biology Platform, School of Science, Monash University Malaysia, Subang Jaya, Malaysia
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Gomes AR, Antão A, Santos AGP, Lacerda TJ, Medeiros MB, Saenz LAI, Alvarenga S, Santos CH, Rigobelo EC, Scotti MR. Rehabilitation of a Riparian Site Contaminated by Tailings from the Fundão Dam, Brazil, Using Different Remediation Strategies. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2021; 40:2359-2373. [PMID: 33928667 DOI: 10.1002/etc.5075] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Revised: 06/25/2020] [Accepted: 04/16/2021] [Indexed: 06/12/2023]
Abstract
The tailings spilled by the Fundão Dam rupture in the Doce River basin (Brazil) had a high pH, elevated sodium (Na) and ether amine, and low soil organic matter. With the aim of decreasing the toxic compounds, we established 2 remediation strategies: treatment 1, phytoremediation with tolerant native species of the Atlantic Forest cultivated on scraped sediment plus the incorporation of organic matter; and treatment 2, phytoremediation with native species plus superficial deposition of organic matter. The experimental site was compared with a degraded site that the dam tailings had reached and with a preserved site, a fragment of preserved Atlantic Forest. After 12 mo, plants showed an outstanding growth, especially after treatment 1 (~4 m), and the remediation procedures resulted in significant decreases in pH (from 8.0 to ~ 6.0), Na (from 154 to 22-35 mg/kg), electrical conductivity, and ether amine (from 6.0 to 0.5 mg/kg) in both treatments. By contrast, ammonium, a product of ether amine degradation, showed a significant increase in the experimental site, along with a significant increase in nitrate and improvement of soil microbial populations assessed by phospholipid fatty acid analysis. The treatments also improved soil fertility in the experimental site, as estimated by soil nutrients, cation exchange capacity, and soil aggregation. Based on the parameters analyzed, a principal component analysis showed that samples from the degraded site and the preserved site clustered in an opposite position and those from the experimental site clustered in an intermediate position but closer to the samples from the preserved site. Overall, our results demonstrated that the remediation procedures adopted were effective and resulted in rehabilitation of a riparian forest contaminated with dam tailings that included Na and ether amine. Environ Toxicol Chem 2021;40:2359-2373. © 2021 SETAC.
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Affiliation(s)
- Alessandra R Gomes
- Department of Botany, Institute of Biological Science and Graduate Program in Plant Biology, Federal University of Minas Gerais, Brazil
| | - Arthur Antão
- Department of Botany, Institute of Biological Science and Graduate Program in Plant Biology, Federal University of Minas Gerais, Brazil
| | - Amanda G P Santos
- Department of Botany, Institute of Biological Science and Graduate Program in Plant Biology, Federal University of Minas Gerais, Brazil
| | - Tomás J Lacerda
- Department of Botany, Institute of Biological Science and Graduate Program in Plant Biology, Federal University of Minas Gerais, Brazil
| | - Mirelli B Medeiros
- Architecture School and Graduate Program in Built Environment and Sustainable Heritage, Federal University of Minas Gerais, Minas Gerais, Brazil
| | - Luis Alberto I Saenz
- Department of Botany, Institute of Biological Science and Graduate Program in Plant Biology, Federal University of Minas Gerais, Brazil
| | - Stael Alvarenga
- Architecture School and Graduate Program in Built Environment and Sustainable Heritage, Federal University of Minas Gerais, Minas Gerais, Brazil
| | - Carlos Henrique Santos
- Department of Plant Production, São Paulo State University, Jaboticabal, São Paulo, Brazil
| | - Everlon C Rigobelo
- Department of Plant Production, São Paulo State University, Jaboticabal, São Paulo, Brazil
| | - Maria Rita Scotti
- Department of Botany, Institute of Biological Science and Graduate Program in Plant Biology, Federal University of Minas Gerais, Brazil
- Architecture School and Graduate Program in Built Environment and Sustainable Heritage, Federal University of Minas Gerais, Minas Gerais, Brazil
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Ren Z, Chen S, Jiang SF, Hu WF, Jiang H. High-Efficiency and Ground-State Atomic Oxygen-Dominant Photodegradation of Carbamazepine by Coupling Chlorine and g-C 3N 4. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.0c05522] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Zhu Ren
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry, University of Science and Technology of China, Hefei 230026, China
| | - Shuo Chen
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry, University of Science and Technology of China, Hefei 230026, China
| | - Shun-Feng Jiang
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry, University of Science and Technology of China, Hefei 230026, China
| | - Wei-Fei Hu
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry, University of Science and Technology of China, Hefei 230026, China
| | - Hong Jiang
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry, University of Science and Technology of China, Hefei 230026, China
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Babu S, Singh R, Avasthe RK, Yadav GS, Das A, Singh VK, Mohapatra KP, Rathore SS, Chandra P, Kumar A. Impact of land configuration and organic nutrient management on productivity, quality and soil properties under baby corn in Eastern Himalayas. Sci Rep 2020; 10:16129. [PMID: 32999388 PMCID: PMC7527329 DOI: 10.1038/s41598-020-73072-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Accepted: 09/07/2020] [Indexed: 11/09/2022] Open
Abstract
Appropriate land configuration and assured nutrient supply are prerequisites for quality organic baby corn (Zea mays L.) production in high rainfall areas of the delicate Eastern Himalayan Region of India. A long term (5-year) study was conducted during 2012-2016 on a sandy loam soil in the mid attitude of Sikkim, Eastern Himalayan Region of India to evaluate the productivity, produce quality, the profitability of baby corn, and soil properties under different land configurations comprising flatbed, ridge and furrow, and broad bed and furrow, and organic nutrient management practices comprising un-amended control, farmyard manure 12 t ha-1, vermicompost 4 t ha-1 and farmyard manure 6 t ha-1 + vermicompost 2 t ha-1. The baby corn sown on broad bed and furrow had the tallest plant (149.25 cm), maximum dry matter (64.33 g plant-1), highest leaf area index (3.5), maximum cob length (8.10 cm), cob girth (6.13 cm) and cob weight (8.14 g) leading to significantly higher fresh baby corn yield (1.89 t ha-1), and net returns (US$ 906.1 ha-1) than those of other treatments. Mineral composition (phosphorus, potassium, iron, and zinc), protein, and ascorbic acid content were also the highest in baby corn grown under the broad bed and furrow system. The soil of broad bed and furrow had a higher pH, organic carbon content, organic carbon pools, microbial biomass carbon, and enzymatic activities (dehydrogenase, fluorescein diacetate, and acid phosphatase) compared to soils of other land configurations. A combined application of farmyard manure (6 t ha-1) + vermicompost (2 t ha-1) improved the crop growth and produced 117.8% higher fresh baby corn and 99.7% higher fodder yield over control (0.9 t fresh corn and 13.02 t fodder yield ha-1), respectively. This treatment also registered significantly higher gross return (US$ 1746.9 ha-1), net return (US$ 935.8 ha-1), and benefit-cost ratio (2.15) than other nutrient management practices. Fresh cob quality in terms of protein (22.91%) and ascorbic acid content (101.6 mg 100 g-1) was observed to be significantly superior under combined application of farmyard manure (6 t ha-1) + vermicompost (2 t ha-1) than those of other nutrient management systems. However, fresh baby corn cobs produced with vermicompost 4 t ha-1 had the highest concentration of phosphorus, potassium, iron, and zinc. Application of farmyard manure 12 t ha-1 registered the maximum increment in soil organic carbon content (1.52%), its pool (40.6 t ha-1) and carbon sequestration rate (0.74 t ha-1 year-1) followed by integrated application of farmyard manure (6 t ha-1) and vermicompost (2 t ha-1). The maximum soil microbial biomass carbon and enzymatic activities [dehydrogenase (22.1 µg TPF g-1 soil h-1) and fluorescein diacetate (67.1 µg FDA g-1 soil h-1)] were noted with the combined use of farmyard manure (6 t ha-1) + vermicompost (2 t ha-1). Thus, the study suggests that the broad bed and furrow land configuration along with the combined application of farmyard manure + vermicompost could be an economically feasible practice for quality organic baby corn production and soil health improvement in the Eastern Himalaya and other similar eco-regions elsewhere.
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Affiliation(s)
- Subhash Babu
- ICAR Research Complex for North Eastern Hill Region, Umiam, Meghalaya, 793 103, India. .,Division of Agronomy, ICAR-Indian Agricultural Research Institute, New Delhi, 110 012, India.
| | - Raghavendra Singh
- ICAR-National Organic Farming Research Institute, Gangtok, Sikkim, 737 102, India.
| | - R K Avasthe
- ICAR-National Organic Farming Research Institute, Gangtok, Sikkim, 737 102, India
| | - Gulab Singh Yadav
- ICAR-Research Complex for North Eastern Hill Region, Tripura Centre, Lembucherra, West Tripura, 799 210, India
| | - Anup Das
- ICAR-Research Complex for North Eastern Hill Region, Tripura Centre, Lembucherra, West Tripura, 799 210, India
| | - Vinod K Singh
- Division of Agronomy, ICAR-Indian Agricultural Research Institute, New Delhi, 110 012, India.
| | - K P Mohapatra
- ICAR-National Bureau of Plant Genetic Resources, New Delhi, 110 012, India
| | - S S Rathore
- Division of Agronomy, ICAR-Indian Agricultural Research Institute, New Delhi, 110 012, India
| | - Puran Chandra
- ICAR-National Bureau of Plant Genetic Resources, New Delhi, 110 012, India
| | - Amit Kumar
- ICAR-National Organic Farming Research Institute, Gangtok, Sikkim, 737 102, India
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11
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Scotti MR, Gomes AR, Lacerda TJ, Ávila SS, Silva SL, Antão A, Santos AG, Medeiros MB, Alvarenga S, Santos CH, Rigobelo EC. Remediation of a Riparian Site in the Brazilian Atlantic Forest Reached by Contaminated Tailings from the Collapsed Fundão Dam with Native Woody Species. INTEGRATED ENVIRONMENTAL ASSESSMENT AND MANAGEMENT 2020; 16:669-675. [PMID: 32196962 DOI: 10.1002/ieam.4272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Revised: 01/10/2020] [Accepted: 03/09/2020] [Indexed: 06/10/2023]
Abstract
The failure of the Fundão dam in Brazil spilled alkaline contaminated sediments (pH ~8) into the Doce River basin. The contaminated sediments had high levels of ether amine (6 mg/kg) and Na (54 mg/kg) in relation to those in preserved sites. In the present study, a riparian forest was established over contaminated sediment using 2 main remediation strategies: phytoremediation with species native to the Atlantic forest and previously selected for their tolerance to sediment toxicity, and physicochemical remediation by incorporating organic matter (OM) into the sediment. In the experimental site (ES), the tolerant native woody species were cultivated in 2 treatments: T1, scraping of the sediments and incorporation of the OM, and T2, nonmanaged sediment and superficial deposition of the OM. The results were compared with the findings from a degraded site (DS), which was reached by the contaminated sediments but lacked vegetation, and a preserved site (PS), which was composed of a fragment of preserved Atlantic forest. Six months after transplanting, the plants from T1 showed a better height growth performance and survival index in relation to those from T2. Furthermore, T1 showed a significant decline in the pH (to ~6) concomitant with a reduction in the ether amine and Na contents (to ~0.4 mg/kg and 23 mg/kg, respectively). There was an improvement in the soil fertility and total microbial biomass in both treatments, especially in T1. Therefore, the adopted phyto- and physicochemical remediation procedures are recommended to reclaim zones reached by dam tailings containing Na and ether amine. Integr Environ Assess Manag 2020;16:669-675. © 2020 SETAC.
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Affiliation(s)
- Maria Rita Scotti
- Departamento de Botânica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Alessandra R Gomes
- Departamento de Botânica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Tomás J Lacerda
- Departamento de Botânica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Stefânia S Ávila
- Departamento de Botânica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Samuel Ll Silva
- Departamento de Botânica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Arthur Antão
- Departamento de Botânica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Amanda Gp Santos
- Departamento de Botânica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Mirelli B Medeiros
- Escola de Arquitetura/UFMG Programa Pos Graduação em Ambiente Construido e Patrimônio Sustentável, Belo Horizonte, Brazil
| | - Stael Alvarenga
- Escola de Arquitetura/UFMG Programa Pos Graduação em Ambiente Construido e Patrimônio Sustentável, Belo Horizonte, Brazil
| | - Carlos Henrique Santos
- Departamento Produção Vegetal, Universidade do Estado de São Paulo (UNESP) Jaboticabal, São Paulo, Brazil
| | - Everlon C Rigobelo
- Escola de Arquitetura/UFMG Programa Pos Graduação em Ambiente Construido e Patrimônio Sustentável, Belo Horizonte, Brazil
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12
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A Review of Metal and Metal-Oxide Nanoparticle Coating Technologies to Inhibit Agglomeration and Increase Bioactivity for Agricultural Applications. AGRONOMY-BASEL 2020. [DOI: 10.3390/agronomy10071018] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Coatings offer a means to control nanoparticle (NP) size, regulate dissolution, and mitigate runoff when added to crops through soil. Simultaneously, coatings can enhance particle binding to plants and provide an additional source of nutrients, making them a valuable component to existing nanoparticle delivery systems. Here, the surface functionalization of metal and metal-oxide nanoparticles to inhibit aggregation and preserve smaller agglomerate sizes for enhanced transport to the rooting zone and improved uptake in plants is reviewed. Coatings are classified by type and by their efficacy to mitigate agglomeration in soils with variable pH, ionic concentration, and natural organic matter profiles. Varying degrees of success have been reported using a range of different polymers, biomolecules, and inorganic surface coatings. Advances in zwitterionic coatings show the best results for maintaining nanoparticle stability in solutions even under high salinity and temperature conditions, whereas coating by the soil component humic acid may show additional benefits such as promoting dissolution and enhancing bioavailability in soils. Pre-tuning of NP surface properties through exposure to select natural organic matter, microbial products, and other biopolymers may yield more cost-effective nonagglomerating metal/metal-oxide NPs for soil applications in agriculture.
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13
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Rippner DA, Lien J, Balla H, Guo T, Green PG, Young TM, Parikh SJ. Surface modification induced cuprous oxide nanoparticle toxicity to duckweed at sub-toxic metal concentrations. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 722:137607. [PMID: 32213435 DOI: 10.1016/j.scitotenv.2020.137607] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Revised: 02/21/2020] [Accepted: 02/26/2020] [Indexed: 06/10/2023]
Abstract
Nanoparticle capping agents are critical for controlling the growth, oxidation state, and final particle size during aqueous synthesis. However, despite the known phytotoxicity of cetyltrimethylammonium bromide (CTAB) to plants, it is used to synthesize metal oxide nanoparticles of uniform size and with mesoporous structure. Among the few studies that have investigated how CTAB influences nanoparticle toxicity, CTAB has never been identified as the primary cause of nanoparticle toxicity in environmental systems; rather nanoparticle surface charge or morphology was identified as the driver of toxicity in environmentally relevant systems. In the current study, CTAB release from CTAB surface modified Cu2O nanoparticles (SM-Cu2O NPs) inhibited duckweed (Landoltia punctata) growth, even when administered at subtoxic Cu concentrations. Organic ligands, such as humic acid (HA) and ethylenediaminetetraacetic acid (EDTA), lessened growth inhibition associated with exposure to SM-Cu2O NPs, likely through electrostatic and hydrophobic interactions with CTAB. Such results highlight the need for a more holistic approach to nanoparticle surface modification and improved communication between toxicologists and synthetic chemists to develop green alternatives for nanoparticle synthesis.
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Affiliation(s)
- Devin A Rippner
- Department of Land, Air and Water Resources, University of California - Davis, One Shields Avenue, Davis, CA 95616, United States of America
| | - Jennifer Lien
- Department of Chemistry, University of California, Davis, One Shields Avenue, Davis, CA 95616, United States of America
| | - Hagr Balla
- Department of Land, Air and Water Resources, University of California - Davis, One Shields Avenue, Davis, CA 95616, United States of America; Department of Civil and Environmental Engineering, University of California - Davis, One Shields Avenue, Davis, CA 95616, United States of America
| | - Ting Guo
- Department of Chemistry, University of California, Davis, One Shields Avenue, Davis, CA 95616, United States of America
| | - Peter G Green
- Department of Civil and Environmental Engineering, University of California - Davis, One Shields Avenue, Davis, CA 95616, United States of America
| | - Thomas M Young
- Department of Chemistry, University of California, Davis, One Shields Avenue, Davis, CA 95616, United States of America
| | - Sanjai J Parikh
- Department of Land, Air and Water Resources, University of California - Davis, One Shields Avenue, Davis, CA 95616, United States of America.
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Terry SA, Ribeiro GDO, Gruninger RJ, Hunerberg M, Ping S, Chaves AV, Burlet J, Beauchemin KA, McAllister TA. Effect of humic substances on rumen fermentation, nutrient digestibility, methane emissions, and rumen microbiota in beef heifers1. J Anim Sci 2018; 96:3863-3877. [PMID: 30169754 PMCID: PMC6127782 DOI: 10.1093/jas/sky265] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Accepted: 07/05/2018] [Indexed: 11/13/2022] Open
Abstract
Ruminants play an important role in food security, but there is a growing concern about the impact of cattle on the environment, particularly regarding greenhouse gas emissions. The objective of this study was to examine the effect of humic substances (HS) on rumen fermentation, nutrient digestibility, methane (CH4) emissions, and the rumen microbiome of beef heifers fed a barley silage-based diet. The experiment was designed as a replicated 4 × 4 Latin square using 8 ruminally cannulated Angus × Hereford heifers (758 ± 40.7 kg initial BW). Heifers were offered a basal diet consisting of 60% barley silage and 40% concentrate (DM basis) with either 0- (control), 100-, 200- or 300-mg granulated HS/kg BW. Each period was 28 d with 14 d of adaptation. Rumen samples were taken on day 15 at 0, 3, 6, and 12 h postfeeding. Total urine and feces were collected from days 18 to 22. Blood samples were taken on day 22 at 0 and 6 h postfeeding. Between days 26 and 28, heifers were placed in open-circuit respiratory chambers to measure CH4. Ruminal pH was recorded continuously during the periods of CH4 measurement using indwelling pH loggers. Intake was similar (P = 0.47) across treatments. Concentration of ammonia-N and counts of rumen protozoa responded quadratically (P = 0.03), where both increased at H100 and then decreased for the H300 treatments. Apparent total tract digestibility of CP (P = 0.04) was linearly increased by HS and total N retention (g/d, % N intake, g/kg BW0.75) was improved (P = 0.04) for HS when compared with the control. There was no effect of HS on CH4 production (g/d; P = 0.83); however, HS decreased the relative abundance of Proteobacteria (P = 0.04) and increased the relative abundance of Synergistetes (P = 0.01) and Euryarchaeota (P = 0.04). Results suggest that HS included at up to 300 mg/kg BW may improve N retention and CP digestibility, but there was no impact on CH4 production.
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Affiliation(s)
- Stephanie A Terry
- The University of Sydney, School of Life and Environmental Sciences, Sydney, New South Wales, Australia
- Lethbridge Research and Development Centre, Agriculture and Agri-Food Canada, Lethbridge, Alberta, Canada
| | - Gabriel de Oliveira Ribeiro
- Lethbridge Research and Development Centre, Agriculture and Agri-Food Canada, Lethbridge, Alberta, Canada
- University of Calgary, Department of Production Animal Health, Calgary, Alberta, Canada
| | - Robert J Gruninger
- Lethbridge Research and Development Centre, Agriculture and Agri-Food Canada, Lethbridge, Alberta, Canada
| | - Martin Hunerberg
- Lethbridge Research and Development Centre, Agriculture and Agri-Food Canada, Lethbridge, Alberta, Canada
- University of Goettingen, Department of Animal Sciences, Goettingen, Germany
| | - Sheng Ping
- Institute of Biological Resources, Jiangxi Academy of Sciences, Nanchang, China
| | - Alex V Chaves
- The University of Sydney, School of Life and Environmental Sciences, Sydney, New South Wales, Australia
| | - Jake Burlet
- Venture West Veterinary Services Ltd, Edmonton, Alberta, Canada
| | - Karen Ann Beauchemin
- Lethbridge Research and Development Centre, Agriculture and Agri-Food Canada, Lethbridge, Alberta, Canada
| | - Tim Angus McAllister
- The University of Sydney, School of Life and Environmental Sciences, Sydney, New South Wales, Australia
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15
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Can the optimisation of pop-up agriculture in remote communities help feed the world? GLOBAL FOOD SECURITY-AGRICULTURE POLICY ECONOMICS AND ENVIRONMENT 2018. [DOI: 10.1016/j.gfs.2018.07.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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16
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Responses of root physiological characteristics and yield of sweet potato to humic acid urea fertilizer. PLoS One 2017; 12:e0189715. [PMID: 29253886 PMCID: PMC5734739 DOI: 10.1371/journal.pone.0189715] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2017] [Accepted: 11/30/2017] [Indexed: 01/24/2023] Open
Abstract
Humic acid (HA), not only promote the growth of crop roots, they can be combined with nitrogen (N) to increase fertilizer use efficiency and yield. However, the effects of HA urea fertilizer (HA-N) on root growth and yield of sweet potato has not been widely investigated. Xushu 28 was used as the experimental crop to investigate the effects of HA-N on root morphology, active oxygen metabolism and yield under field conditions. Results showed that nitrogen application alone was not beneficial for root growth and storage root formation during the early growth stage. HA-N significantly increased the dry weight of the root system, promoted differentiation from adventitious root to storage root, and increased the overall root activity, total root length, root diameter, root surface area, as well as root volume. HA-N thus increased the activity of superoxide dismutase (SOD), peroxidase (POD), and Catalase (CAT) as well as increasing the soluble protein content of roots and decreasing the malondialdehyde (MDA) content. HA-N significantly increased both the number of storage roots per plant increased by 14.01%, and the average fresh weight per storage root increased by 13.7%, while the yield was also obviously increased by 29.56%. In this study, HA-N increased yield through a synergistic increase of biological yield and harvest index.
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17
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Engel M, Chefetz B. Adsorption and desorption of dissolved organic matter by carbon nanotubes: Effects of solution chemistry. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2016; 213:90-98. [PMID: 26878603 DOI: 10.1016/j.envpol.2016.02.009] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2015] [Revised: 02/01/2016] [Accepted: 02/03/2016] [Indexed: 05/21/2023]
Abstract
Increasing use of carbon nanotubes (CNTs) has led to their introduction into the environment where they can interact with dissolved organic matter (DOM). This study focuses on solution chemistry effects on DOM adsorption/desorption processes by single-walled CNTs (SWCNTs). Our data show that DOM adsorption is controlled by the attachment of DOM molecules to the SWCNTs, and that the initial adsorption rate is dependent on solution parameters. Adsorbed amount of DOM at high ionic strength was limited, possibly due to alterations in SWCNT bundling. Desorption of DOM performed at low pH resulted in additional DOM adsorption, whereas at high pH, adsorbed DOM amount decreased. The extent of desorption conducted at increased ionic strength was dependent on pre-adsorbed DOM concentration: low DOM loading stimulated additional adsorption of DOM, whereas high DOM loading facilitated release of adsorbed DOM. Elevated ionic strength and increased adsorbed amount of DOM reduced the oxidation temperature of the SWCNTs, suggesting that changes in the assembly of the SWCNTs had occurred. Moreover, DOM-coated SWCNTs at increased ionic strength provided fewer sites for atrazine adsorption. This study enhances our understanding of DOM-SWCNT interactions in aqueous systems influenced by rapid changes in salinity, and facilitates potential use of SWCNTs in water-purification technologies.
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Affiliation(s)
- Maya Engel
- Department of Soil and Water Sciences, Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, P.O. Box 12, Rehovot 7610001, Israel
| | - Benny Chefetz
- Department of Soil and Water Sciences, Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, P.O. Box 12, Rehovot 7610001, Israel.
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18
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Kalčíková G, Zupančič M, Jemec A, Gotvajn AŽ. The impact of humic acid on chromium phytoextraction by aquatic macrophyte Lemna minor. CHEMOSPHERE 2016; 147:311-317. [PMID: 26766370 DOI: 10.1016/j.chemosphere.2015.12.090] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2015] [Revised: 11/22/2015] [Accepted: 12/23/2015] [Indexed: 06/05/2023]
Abstract
Studies assessing chromium phytoextration from natural waters rarely consider potential implications of chromium speciation in the presence of ubiquitous humic substances. Therefore, the present study investigated the influence of environmentally relevant concentration of humic acid (TOC = 10 mg L(-1)) on chromium speciation (Cr = 0.15 mg L(-1)) and consequently on phytoextraction by aquatic macrophyte duckweed Lemna minor. In absence of humic acid, only hexavalent chromium was present in water samples and easily taken up by L. minor. Chromium uptake resulted in a significant reduction of growth rate by 22% and decrease of chlorophyll a and chlorophyll b contents by 48% and 43%, respectively. On the other hand, presence of humic acid significantly reduced chromium bioavailability (57% Cr uptake decrease) and consequently it did not cause any measurable effect to duckweed. Such effect was related to abiotic reduction of hexavalent chromium species to trivalent. Hence, findings of our study suggest that presence of humic acid and chromium speciation cannot be neglected during phytoextraction studies.
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Affiliation(s)
- Gabriela Kalčíková
- Faculty of Chemistry and Chemical Technology, University of Ljubljana, 113 Večna pot, SI-1000 Ljubljana, Slovenia.
| | - Marija Zupančič
- Faculty of Chemistry and Chemical Technology, University of Ljubljana, 113 Večna pot, SI-1000 Ljubljana, Slovenia
| | - Anita Jemec
- Biotechnical Faculty, University of Ljubljana, 111 Večna pot, SI-1000 Ljubljana, Slovenia
| | - Andreja Žgajnar Gotvajn
- Faculty of Chemistry and Chemical Technology, University of Ljubljana, 113 Večna pot, SI-1000 Ljubljana, Slovenia
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19
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Zang Y, Wei X, Hao M. Long-Term Effect of Crop Rotation and Fertilisation on Bioavailability and Fractionation of Copper in Soil on the Loess Plateau in Northwest China. PLoS One 2015; 10:e0145370. [PMID: 26694965 PMCID: PMC4687829 DOI: 10.1371/journal.pone.0145370] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2015] [Accepted: 12/01/2015] [Indexed: 12/02/2022] Open
Abstract
The bioavailability and fractionation of Cu reflect its deliverability in soil. Little research has investigated Cu supply to crops in soil under long-term rotation and fertilisation on the Loess Plateau. A field experiment was conducted in randomized complete block design to determine the bioavailability and distribution of Cu fractions in a Heilu soil (Calcaric Regosol) after 18 years of rotation and fertilisation. The experiment started in 1984, including five cropping systems (fallow control, alfalfa cropping, maize cropping, winter wheat cropping, and grain-legume rotation of pea/winter wheat/winter wheat + millet) and five fertiliser treatments (unfertilised control, N, P, N + P, and N + P + manure). Soil samples were collected in 2002 for chemical analysis. Available Cu was assessed by diethylene triamine pentaacetic acid (DTPA) extraction, and Cu was fractionated by sequential extraction. Results showed that DTPA-Cu was lower in cropping systems compared with fallow control. Application of fertilisers resulted in no remarkable changes in DTPA-Cu compared with unfertilised control. Correlation and path analyses revealed that soil pH and CaCO3 directly affected Cu bioavailability, whereas available P indirectly affected Cu bioavailability. The concentrations of Cu fractions (carbonate and Fe/Al oxides) in the plough layer were lower in cropping systems, while the values in the plough sole were higher under grain-legume rotation relative to fallow control. Manure with NP fertiliser increased Cu fractions bound to organic matter and minerals in the plough layer, and its effects in the plough sole varied with cropping systems. The direct sources (organic-matter-bound fraction and carbonate-bound fraction) of available Cu contributed much to Cu bioavailability. The mineral-bound fraction of Cu acted as an indicator of Cu supply potential in the soil.
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Affiliation(s)
- Yifei Zang
- College of Natural Resources and Environment, Northwest A & F University, Yangling, Shaanxi, China
| | - Xiaorong Wei
- Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi, China
| | - Mingde Hao
- College of Natural Resources and Environment, Northwest A & F University, Yangling, Shaanxi, China
- Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi, China
- * E-mail:
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20
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Qian S, Ding W, Li Y, Liu G, Sun J, Ding Q. Characterization of humic acids derived from Leonardite using a solid-state NMR spectroscopy and effects of humic acids on growth and nutrient uptake of snap bean. CHEMICAL SPECIATION & BIOAVAILABILITY 2015. [DOI: 10.1080/09542299.2015.1118361] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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21
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Maji D, Singh M, Wasnik K, Chanotiya C, Kalra A. The role of a novel fungal strain Trichoderma atroviride
RVF3 in improving humic acid content in mature compost and vermicompost via ligninolytic and celluloxylanolytic activities. J Appl Microbiol 2015; 119:1584-96. [DOI: 10.1111/jam.12954] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2015] [Revised: 08/26/2015] [Accepted: 09/11/2015] [Indexed: 11/27/2022]
Affiliation(s)
- D. Maji
- Microbial Technology Department; CSIR-Central Institute of Medicinal and Aromatic Plants; Lucknow Uttar Pradesh India
| | - M. Singh
- Central Instrument Facility; CSIR-Central Institute of Medicinal and Aromatic Plants; Lucknow Uttar Pradesh India
| | - K. Wasnik
- Microbial Technology Department; CSIR-Central Institute of Medicinal and Aromatic Plants; Lucknow Uttar Pradesh India
| | - C.S. Chanotiya
- Central Instrument Facility; CSIR-Central Institute of Medicinal and Aromatic Plants; Lucknow Uttar Pradesh India
| | - A. Kalra
- Microbial Technology Department; CSIR-Central Institute of Medicinal and Aromatic Plants; Lucknow Uttar Pradesh India
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Mukherjee A, Lal R, Zimmerman AR. Effects of biochar and other amendments on the physical properties and greenhouse gas emissions of an artificially degraded soil. THE SCIENCE OF THE TOTAL ENVIRONMENT 2014; 487:26-36. [PMID: 24751592 DOI: 10.1016/j.scitotenv.2014.03.141] [Citation(s) in RCA: 81] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2014] [Revised: 03/14/2014] [Accepted: 03/31/2014] [Indexed: 06/03/2023]
Abstract
Short and long-term impacts of biochar on soil properties under field conditions are poorly understood. In addition, there is a lack of field reports of the impacts of biochar on soil physical properties, gaseous emissions and C stability, particularly in comparison with other amendments. Thus, three amendments - biochar produced from oak at 650°C, humic acid (HA) and water treatment residual - (WTR) were added to a scalped silty-loam soil @ 0.5% (w/w) in triplicated plots under soybean. Over the 4-month active growing season, all amendments significantly increased soil pH, but the effect of biochar was the greatest. Biochar significantly increased soil-C by 7%, increased sub-nanopore surface area by 15% and reduced soil bulk density by 13% compared to control. However, only WTR amendment significantly increased soil nanopore surface area by 23% relative to the control. While total cumulative CH4 and CO2 emissions were not significantly affected by any amendment, cumulative N2O emission was significantly decreased in the biochar-amended soil (by 92%) compared to control over the growing period. Considering both the total gas emissions and the C removed from the atmosphere as crop growth and C added to the soil, WTR and HA resulted in net soil C losses and biochar as a soil C gain. However, all amendments reduced the global warming potential (GWP) of the soil and biochar addition even produced a net negative GWP effect. The short observation period, low application rate and high intra-treatment variation resulted in fewer significant effects of the amendments on the physicochemical properties of the soils than one might expect indicating further possible experimentation altering these variables. However, there was clear evidence of amendment-soil interaction processes affecting both soil properties and gaseous emissions, particularly for biochar, that might lead to greater changes with additional field emplacement time.
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Affiliation(s)
- A Mukherjee
- Carbon Management and Sequestration Center, School of Natural Resources and Environment, The Ohio State University, 2021 Coffey Road, 414A/422B Kottman Hall, Columbus, OH 43210, United States.
| | - R Lal
- Carbon Management and Sequestration Center, School of Natural Resources and Environment, The Ohio State University, 2021 Coffey Road, 414A/422B Kottman Hall, Columbus, OH 43210, United States
| | - A R Zimmerman
- Department of Geological Sciences, University of Florida, 241 Williamson Hall, P.O. Box 112120, Gainesville, FL 32611, United States
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Biochar Impacts on Soil Physical Properties and Greenhouse Gas Emissions. AGRONOMY-BASEL 2013. [DOI: 10.3390/agronomy3020313] [Citation(s) in RCA: 98] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Asakura H, Nakagawa K, Endo K, Yamada M, Ono Y, Ono Y. Influence of oxygen flow rate and compost addition on reduction of organic matter in aerated waste layer containing mainly incineration residue. J Environ Sci (China) 2013; 25:53-58. [PMID: 23586299 DOI: 10.1016/s1001-0742(12)60022-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Landfilling municipal solid waste incineration (MSWI) residue alkalizes the waste layer, causing a subsequent decrease in microbial activity and a delay in the decomposition of organic matter. In this study, efficiencies of neutralization of the leachate and organic matter decomposition in the waste layer in a column filled with MSWI residue using aeration and compost addition were evaluated. Total organic carbon (TOC) reduction in the waste layer is large at high oxygen flow rate (OFR). To effectively accelerate TOC reduction in the waste layer to which compost was added, a high OFR exceeding that by natural ventilation was required. At day 65, the pH of the leachate when OFR was above 10(2) mol-O2/(day x m3) was lower than that when OFR was below 10(1) mol-O2/(day x m3). At the same OFR, the pH of waste sample was lower than that of waste sample with compost. Although leachate neutralization could be affected by compost addition, TOC reduction in the waste layer became rather small. It is possible that humic substances in compost prevent the decomposition of TOC in MSWI residue.
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Affiliation(s)
- Hiroshi Asakura
- Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan.
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Shahid SA, Qidwai AA, Anwar F, Ullah I, Rashid U. Effects of a novel poly (AA-co-AAm)/AlZnFe₂O₄/potassium humate superabsorbent hydrogel nanocomposite on water retention of sandy loam soil and wheat seedling growth. Molecules 2012; 17:12587-602. [PMID: 23099615 PMCID: PMC6268564 DOI: 10.3390/molecules171112587] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2012] [Revised: 10/06/2012] [Accepted: 10/15/2012] [Indexed: 11/16/2022] Open
Abstract
A novel poly(acrylic acid-co-acrylamide)AlZnFe₂O₄/potassium humate( )superabsorbent hydrogel nanocomposite (PHNC) was synthesized and its physical properties characterized using SEM, Energy Dispersive X-ray (EDX) and FTIR spectroscopic techniques. Air dried sandy loam soil was amended with 0.1 to 0.4 w/w% of PHNC to evaluate its soil moisture retention attributes. Effect of PHNC amendment on pH, electrical conductivity (EC), porosity, bulk density and hydraulic conductivity of sandy loam soil was also studied. The soil amendment with 0.1 to 0.4 w/w% of PHNC remarkably enhanced the moisture retention at field capacity as compared to the un-amended soils. Seed germination and seedling growth of wheat (Triticum aestivum L.) was considerably increased and a delay by 6-9 days in wilting of seedlings was observed in the soil amended with PHNC, resulting in improved wheat plant establishment and growth.
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Affiliation(s)
- Shaukat Ali Shahid
- Department of Physics, University of Agriculture, Faisalabad 38040, Pakistan
- Department of Physics, University of Karachi, Karachi 75270, Pakistan
- Authors to whom correspondence should be addressed; (S.A.S.); (U.R.); Tel.: +92-41-920-0161 (ext. 3314) (S.A.S.); Fax: +92-41-920-0109 (S.A.S.); Tel.: +60-603-8946-7393 (U.R.); Fax: +60-603-8946-7006 (U.R.)
| | | | - Farooq Anwar
- Department of Chemistry, University of Sargodha, Sargodha 40100, Pakistan
| | - Inam Ullah
- Department of Chemistry and Biochemistry, University of Agriculture Faisalabad-38040, Pakistan
| | - Umer Rashid
- Institute of Advanced Technology, Universiti Putra Malaysia, Serdang-43400, Selangor, Malaysia
- Authors to whom correspondence should be addressed; (S.A.S.); (U.R.); Tel.: +92-41-920-0161 (ext. 3314) (S.A.S.); Fax: +92-41-920-0109 (S.A.S.); Tel.: +60-603-8946-7393 (U.R.); Fax: +60-603-8946-7006 (U.R.)
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Khaled H, Fawy HA. Effect of different levels of humic acids on the nutrient content, plant growth, and soil properties under conditions of salinity. SOIL AND WATER RESEARCH 2011; 6:21-29. [PMID: 0 DOI: 10.17221/4/2010-swr] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
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Distribution and forms of iron in the vertisols of Serbia. JOURNAL OF THE SERBIAN CHEMICAL SOCIETY 2011. [DOI: 10.2298/jsc100619068j] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Soil of arable land and meadows from the Ap horizon, taken from ten different
localities, were investigated for different forms of Fe, including total
(HF), pseudo-total (HNO3), 0.1M HCl extractable and DTPA-extractable. A
sequential fractional procedure was employed to separate the Fe into
fractions: water soluble and exchangeable Fe (I), Fe specifically adsorbed
with carbonates (II), reducibly releasable Fe in oxides (III), Fe bonded with
organic matter (IV) and Fe structurally bonded in silicates (residual
fraction) (V). The soil pH, CEC, and size fractions (clay and silt) had a
strongest influence on the distribution of the different forms of Fe. The
different extraction methods showed similar patterns of the Fe content in
arable and meadow soils. However, the DTPA iron did not correspond with the
total iron, which confirms the widespread incidence of iron-deficiency in
vertisols is independent of the total iron in soils. The amount of
exchangeable (fraction I) and specifically adsorbed (II) iron showed no
dependence on its content in the other fractions, indicating low mobility of
iron in vertisols. The strong positive correlation (r = 0.812 and 0.956)
between the content of iron in HNO3 and HF and its contents in the primary
and secondary minerals (fraction - V) indicate a low content of plant
accessible iron in the vertisol. The sequential fractional procedure was
confirmed as suitable for accessing the content and availability of iron in
the vertisols of Serbia.
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Dong L, Córdova-Kreylos AL, Yang J, Yuan H, Scow KM. Humic acids buffer the effects of urea on soil ammonia oxidizers and potential nitrification. SOIL BIOLOGY & BIOCHEMISTRY 2009; 41:1612-1621. [PMID: 22267875 PMCID: PMC3260537 DOI: 10.1016/j.soilbio.2009.04.023] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Humic acids (HAs) play an important role in the global nitrogen cycle by influencing the distribution, bioavailability, and ultimate fate of organic nitrogen. Ammonium oxidation by autotrophic ammonia-oxidizing bacteria (AOB) is a key process in ecosystems and is limited, in part, by the availability of [Formula: see text]. We evaluated the impact of HAs on soil AOB in microcosms by applying urea (1.0%, equal to 10 mg urea/g soil) with 0.1% bHA (biodegraded lignite humic acids, equal to 1 mg/g soil), 0.1% cHA (crude lignite humic acids) or no amendment. AOB population size, ammonium and nitrate concentrations were monitored for 12 weeks after urea and HA application. AOB densities (quantified by real-time PCR targeting the amoA) in the Urea treatments increased about ten-fold (the final abundance: 5.02 × 10(7) copies (g of dry soil)(-1)) after one week of incubation and decreased to the initial density after 12 weeks incubation; the population size of total bacteria (quantified by real-time PCR with a universal bacterial probe) decreased from 1.12 × 10(10) to 2.59 × 10(9) copies (g of dry soil)(-1) at week one and fluctuated back to the initial copy number at week 12. In the Urea + bHA and Urea + cHA treatments, the AOB densities were 4 and 6 times higher, respectively, than the initial density of approximately 5.07 × 10(6) copies (g of dry soil)(-1) at week 1 and did not change much up to week 4; the total bacteria density changed little over time. The AOB and total bacteria density of the controls changed little during the 12 weeks of incubation. The microbial community composition of the Urea treatment, based on T-RFLP using CCA (canonical correspondence analysis) and pCCA (partial CCA) analysis, was clearly different from those of other treatments, and suggested that lignite HAs buffered the change in diversity and quantity of total bacteria caused by the application of urea to the soil. We hypothesize that HAs can inhibit the change in microbial community composition and numbers, as well as AOB population size by reducing the hydrolysis rate from urea to ammonium in soils amended with urea.
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Affiliation(s)
- Lianhua Dong
- State Key Lab for Agrobiotechnology, College of Biological Sciences and Center of Biomass Engineering, China Agricultural University, No. 2 Yuanmingyuan West Road, Beijing 100193, PR China
- Department of Land, Air and Water Resources, University of California, Davis, CA 95616-5200, USA
| | | | - Jinshui Yang
- State Key Lab for Agrobiotechnology, College of Biological Sciences and Center of Biomass Engineering, China Agricultural University, No. 2 Yuanmingyuan West Road, Beijing 100193, PR China
| | - Hongli Yuan
- State Key Lab for Agrobiotechnology, College of Biological Sciences and Center of Biomass Engineering, China Agricultural University, No. 2 Yuanmingyuan West Road, Beijing 100193, PR China
| | - Kate M. Scow
- Department of Land, Air and Water Resources, University of California, Davis, CA 95616-5200, USA
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Tai YS, Bragg J, Meinhardt SW. Functional Characterization of ToxA and Molecular Identification of its Intracellular Targeting Protein in Wheat. ACTA ACUST UNITED AC 2007. [DOI: 10.3923/ajpp.2007.76.89] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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30
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Lanquar V, Lelièvre F, Bolte S, Hamès C, Alcon C, Neumann D, Vansuyt G, Curie C, Schröder A, Krämer U, Barbier-Brygoo H, Thomine S. Mobilization of vacuolar iron by AtNRAMP3 and AtNRAMP4 is essential for seed germination on low iron. EMBO J 2005; 24:4041-51. [PMID: 16270029 PMCID: PMC1356305 DOI: 10.1038/sj.emboj.7600864] [Citation(s) in RCA: 398] [Impact Index Per Article: 20.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2005] [Accepted: 10/11/2005] [Indexed: 11/09/2022] Open
Abstract
Iron (Fe) is necessary for all living cells, but its bioavailability is often limited. Fe deficiency limits agriculture in many areas and affects over a billion human beings worldwide. In mammals, NRAMP2/DMT1/DCT1 was identified as a major pathway for Fe acquisition and recycling. In plants, AtNRAMP3 and AtNRAMP4 are induced under Fe deficiency. The similitude of AtNRAMP3 and AtNRAMP4 expression patterns and their common targeting to the vacuole, together with the lack of obvious phenotype in nramp3-1 and nramp4-1 single knockout mutants, suggested a functional redundancy. Indeed, the germination of nramp3 nramp4 double mutants is arrested under low Fe nutrition and fully rescued by high Fe supply. Mutant seeds have wild type Fe content, but fail to retrieve Fe from the vacuolar globoids. Our work thus identifies for the first time the vacuole as an essential compartment for Fe storage in seeds. Our data indicate that mobilization of vacuolar Fe stores by AtNRAMP3 and AtNRAMP4 is crucial to support Arabidopsis early development until efficient systems for Fe acquisition from the soil take over.
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Affiliation(s)
- Viviane Lanquar
- Institut des Sciences du Végétal, CNRS, Gif-sur-Yvette, France
| | | | - Susanne Bolte
- Plate-forme d'Imagerie et Biologie Cellulaire, IFR 87 ‘La Plante et son Environnement'/CNRS, Gif-sur-Yvette, France
| | - Cécile Hamès
- Institut des Sciences du Végétal, CNRS, Gif-sur-Yvette, France
| | - Carine Alcon
- Institut des Sciences du Végétal, CNRS, Gif-sur-Yvette, France
| | - Dieter Neumann
- Leibnitz Institute for Plant Biochemistry, Weinberg, Halle/Saale, Germany
| | - Gérard Vansuyt
- Biochimie et Physiologie Moléculaire des Plantes, CNRS (UMR5004)/INRA/AgroM/Université Montpellier 2, Montpellier, France
| | - Catherine Curie
- Biochimie et Physiologie Moléculaire des Plantes, CNRS (UMR5004)/INRA/AgroM/Université Montpellier 2, Montpellier, France
| | - Astrid Schröder
- Max Planck Institute of Molecular Plant Physiology, Golm, Germany
| | - Ute Krämer
- Max Planck Institute of Molecular Plant Physiology, Golm, Germany
| | | | - Sebastien Thomine
- Institut des Sciences du Végétal, CNRS, Gif-sur-Yvette, France
- Institut des Sciences du Végétal, CNRS, Avenue de la Terrasse, 91198 Gif-sur-Yvette, France. Tel.: +33 1 69 82 37 93; Fax: +33 1 69 82 37 68; E-mail:
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