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Ikeda S, Okazaki K, Takahashi H, Tsurumaru H, Minamisawa K. Seasonal Shifts in Bacterial Community Structures in the Lateral Root of Sugar Beet Grown in an Andosol Field in Japan. Microbes Environ 2023; 38. [PMID: 36754423 PMCID: PMC10037095 DOI: 10.1264/jsme2.me22071] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023] Open
Abstract
To investigate functional plant growth-promoting rhizobacteria in sugar beet, seasonal shifts in bacterial community structures in the lateral roots of sugar beet were examined using amplicon sequencing ana-lyses of the 16S rRNA gene. Shannon and Simpson indexes significantly increased between June and July, but did not significantly differ between July and subsequent months (August and September). A weighted UniFrac principal coordinate ana-lysis grouped bacterial samples into four clusters along with PC1 (43.8%), corresponding to the four sampling months in the order of sampling dates. Taxonomic ana-lyses revealed that bacterial diversity in the lateral roots was exclusively dominated by three phyla (Actinobacteria, Bacteroidetes, and Proteobacteria) in all samples examined. At the lower taxonomic levels, the dominant taxa were roughly classified into three groups. Therefore, the relative abundances of seven dominant genera (Janthinobacterium, Kribbella, Pedobacter, Rhodanobacter, Sphingobium, Sphingopyxis, and Streptomyces) were the highest in June and gradually decreased as sugar beet grew. The relative abundances of eight taxa (Bradyrhizobiaceae, Caulobacteraceae, Chitinophagaceae, Novosphingobium, Phyllobacteriaceae, Pseudomonas, Rhizobiaceae, and Sphingomonas) were mainly high in July and/or August. The relative abundances of six taxa (unclassified Comamonadaceae, Cytophagaceae, unclassified Gammaproteobacteria, Haliangiaceae, unclassified Myxococcales, and Sinobacteraceae) were the highest in September. Among the dominant taxa, 12 genera (Amycolatopsis, Bradyrhizobium, Caulobacter, Devosia, Flavobacterium, Janthinobacterium, Kribbella, Kutzneria, Pedobacter, Rhizobium, Rhodanobacter, and Steroidobacter) were considered to be candidate groups of plant growth-promoting bacteria based on their previously reported beneficial traits as biopesticides and/or biofertilizers.
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Affiliation(s)
- Seishi Ikeda
- Memuro Research Station, Hokkaido Agricultural Research Center, National Agriculture and Food Research Organization
| | - Kazuyuki Okazaki
- Memuro Research Station, Hokkaido Agricultural Research Center, National Agriculture and Food Research Organization
| | - Hiroyuki Takahashi
- Memuro Research Station, Hokkaido Agricultural Research Center, National Agriculture and Food Research Organization
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Freitas T, Bartelega L, Santos C, Dutra MP, Sarkis LF, Guimarães RJ, Dominghetti AW, Zito PC, Fernandes TJ, Guelfi D. Technologies for Fertilizers and Management Strategies of N-Fertilization in Coffee Cropping Systems to Reduce Ammonia Losses by Volatilization. PLANTS (BASEL, SWITZERLAND) 2022; 11:3323. [PMID: 36501362 PMCID: PMC9741429 DOI: 10.3390/plants11233323] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Revised: 10/13/2022] [Accepted: 10/20/2022] [Indexed: 06/17/2023]
Abstract
The aim of this study was to quantify NH3-N losses from conventional, stabilized, slow-release, and controlled-release N fertilizers in a coffee field. The N fertilizers analyzed were prilled urea, prilled urea dissolved in water, ammonium sulfate (AS), ammonium nitrate (AN), urea + Cu + B, urea + adhesive + CaCO3, and urea + NBPT (all with three split applications), as well as blended N fertilizer, urea + elastic resin, urea-formaldehyde, and urea + polyurethane (all applied only once). NH3-N losses (mean of two crop seasons) were statistically higher for urea + adhesive + CaCO3 (27.9% of applied N) in comparison with the other treatments. Loss from prilled urea (23.7%) was less than from urea + adhesive + CaCO3. Losses from urea + NBPT (14.5%) and urea + Cu + B (13.5%) were similar and lower than those from prilled urea. Urea dissolved in water (4.2%) had even lower losses than those treatments, and the lowest losses were observed for AS (0.6%) and AN (0.5%). For the single application fertilizers, higher losses occurred for urea + elastic resin (5.8%), blended N fertilizer (5.5%), and urea + polyurethane (5.2%); and urea-formaldehyde had a lower loss (0.5%). Except for urea + adhesive + CaCO3, all N-fertilizer technologies reduced NH3-N losses compared to prilled urea.
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Affiliation(s)
- Tainah Freitas
- Department of Agriculture, Federal University of Lavras, Lavras 37203-202, Brazil
| | - Lucas Bartelega
- Department of Soil Science, Federal University of Lavras, Lavras 37203-202, Brazil
| | - César Santos
- Department of Soil Science, Federal University of Lavras, Lavras 37203-202, Brazil
| | - Mateus Portes Dutra
- Department of Soil Science, Federal University of Lavras, Lavras 37203-202, Brazil
| | | | | | | | | | | | - Douglas Guelfi
- Department of Soil Science, Federal University of Lavras, Lavras 37203-202, Brazil
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Niu T, Xie J, Li J, Zhang J, Zhang X, Ma H, Wang C. Response of rhizosphere microbial community of Chinese chives under different fertilization treatments. Front Microbiol 2022; 13:1031624. [PMID: 36478855 PMCID: PMC9719922 DOI: 10.3389/fmicb.2022.1031624] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Accepted: 11/02/2022] [Indexed: 09/29/2023] Open
Abstract
Soil microorganisms play an irreplaceable role in agricultural production, however, an understanding of response of soil microorganisms to slow-release and common fertilizer applications is limited. In this study, different amounts of slow- release fertilizer were used to overwintering Chinese chives growing area in a plastic greenhouse to investigate the effects of on rhizosphere soil physicochemical properties and soil microbial communities (bacteria and fungi) of Chinese chives. The result displayed that application of slow-release fertilizer significantly improved soil nutrients, soil enzyme activity, and soil microbial community structure and diversity compared to conventional fertilizer application. Compared with T1 treatment, the content of total nitrogen (TN) and available phosphorus (AP), and the SU-E activity in the soil of T2 (NPK: 62.8 kg · 667 m-2) increased by 42.58%, 16.67%, and 9.70%, respectively, showing the best effects. In addition, soil bacterial diversity index and soil microbial community structure were improved as indicated by increased relative abundance of each species, such as Byssovorax, Sandaracinus, and Cellvibrio. Oppositely, the both soil fungal diversity and the number of species decreased after fertilizationthe relative abundance of Ascomycota increased in each fertilization treatment detected by ITS sequencing. Further, the relative abundance of pathogenic fungi such as Pezizomycetes, Cantharellales, and Pleosporales decreased in the T2 treatment. Principal Coordinates Analysis (PCoA) showed that both the amount of fertilizer applied and the type of fertilizer applied affected the soil microbial community structure. RDA evidenced that soil bacteria, Proteobacteria and Gemmatimonadetes, were closely correlated with soil AN, SOM, and AK. Acidobacteria were closely correlated with soil pH, TN, and AP. Ascomycota was closely correlated with soil pH and TN. In conclusion, the application of slow-release fertilizers and reduced fertilizer applicationcould improve soil physical and chemical properties as well as soil microbial community structure and diversity, contributing to sustainable soil development. The recommended fertilization rate for overwintering Chinese chives is NPK: 62.8 kg · 667 m-2.
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Affiliation(s)
- Tianhang Niu
- College of Horticulture, Gansu Agricultural University, Lanzhou, China
| | - Jianming Xie
- College of Horticulture, Gansu Agricultural University, Lanzhou, China
| | - Jing Li
- College of Horticulture, Gansu Agricultural University, Lanzhou, China
| | - Jing Zhang
- College of Horticulture, Gansu Agricultural University, Lanzhou, China
| | - Xiaodan Zhang
- College of Horticulture, Gansu Agricultural University, Lanzhou, China
| | - Hongyan Ma
- Lanzhou New Area Agricultural Science and Technology Development Co., Ltd., Lanzhou, China
| | - Cheng Wang
- College of Horticulture, Gansu Agricultural University, Lanzhou, China
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Okazaki K, Tsurumaru H, Hashimoto M, Takahashi H, Okubo T, Ohwada T, Minamisawa K, Ikeda S. Community Analysis-based Screening of Plant Growth-promoting Bacteria for Sugar Beet. Microbes Environ 2021; 36. [PMID: 33907063 PMCID: PMC8209457 DOI: 10.1264/jsme2.me20137] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Clone libraries of bacterial 16S rRNA genes (a total of 1,980 clones) were constructed from the leaf blades, petioles, taproots, and lateral roots of sugar beet (Beta vulgaris L.) grown under different fertilization conditions. A principal coordinate analysis revealed that the structures of bacterial communities in above- and underground tissues were largely separated by PC1 (44.5%). The bacterial communities of above-ground tissues (leaf blades and petioles) were more tightly clustered regardless of differences in the tissue types and fertilization conditions than those of below-ground tissues (taproots and lateral roots). The bacterial communities of below-ground tissues were largely separated by PC2 (26.0%). To survey plant growth-promoting bacteria (PGPBs), isolate collections (a total of 665 isolates) were constructed from the lateral roots. As candidate PGPBs, 44 isolates were selected via clustering analyses with the combined 16S rRNA gene sequence data of clone libraries and isolate collections. The results of inoculation tests using sugar beet seedlings showed that eight isolates exhibited growth-promoting effects on the seedlings. Among them, seven isolates belonging to seven genera (Asticcacaulis, Mesorhizobium, Nocardioides, Sphingobium, Sphingomonas, Sphingopyxis, and Polaromonas) were newly identified as PGPBs for sugar beet at the genus level, and two isolates belonging to two genera (Asticcacaulis and Polaromonas) were revealed to exert growth-promoting effects on the plant at the genus level for the first time. These results suggest that a community analysis-based selection strategy will facilitate the isolation of novel PGPBs and extend the potential for the development of novel biofertilizers.
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Affiliation(s)
- Kazuyuki Okazaki
- Memuro Research Station, Hokkaido Agricultural Research Center, National Agriculture and Food Research Organization
| | | | | | - Hiroyuki Takahashi
- Memuro Research Station, Hokkaido Agricultural Research Center, National Agriculture and Food Research Organization
| | | | - Takuji Ohwada
- Department of Agricultural and Life Sciences, Obihiro University of Agriculture and Veterinary Medicine
| | | | - Seishi Ikeda
- Memuro Research Station, Hokkaido Agricultural Research Center, National Agriculture and Food Research Organization
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Yao R, Yang J, Wang X, Xie W, Zheng F, Li H, Tang C, Zhu H. Response of soil characteristics and bacterial communities to nitrogen fertilization gradients in a coastal salt‐affected agroecosystem. LAND DEGRADATION & DEVELOPMENT 2021; 32:338-353. [PMID: 0 DOI: 10.1002/ldr.3705] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Accepted: 06/26/2020] [Indexed: 05/22/2023]
Affiliation(s)
- Rongjiang Yao
- State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil Science, Chinese Academy of Sciences (CAS) Nanjing 210008 PR China
| | - Jinsong Yang
- State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil Science, Chinese Academy of Sciences (CAS) Nanjing 210008 PR China
| | - Xiangping Wang
- State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil Science, Chinese Academy of Sciences (CAS) Nanjing 210008 PR China
| | - Wenping Xie
- State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil Science, Chinese Academy of Sciences (CAS) Nanjing 210008 PR China
| | - Fule Zheng
- State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil Science, Chinese Academy of Sciences (CAS) Nanjing 210008 PR China
- University of Chinese Academy of Sciences Beijing 100049 PR China
| | - Hongqiang Li
- State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil Science, Chinese Academy of Sciences (CAS) Nanjing 210008 PR China
- University of Chinese Academy of Sciences Beijing 100049 PR China
| | - Cong Tang
- State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil Science, Chinese Academy of Sciences (CAS) Nanjing 210008 PR China
- University of Chinese Academy of Sciences Beijing 100049 PR China
| | - Hai Zhu
- State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil Science, Chinese Academy of Sciences (CAS) Nanjing 210008 PR China
- University of Chinese Academy of Sciences Beijing 100049 PR China
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Wasai S, Minamisawa K. Plant-Associated Microbes: From Rhizobia To Plant Microbiomes. Microbes Environ 2019; 33:1-3. [PMID: 29593170 PMCID: PMC5877334 DOI: 10.1264/jsme2.me3301rh] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Affiliation(s)
- Sawa Wasai
- Graduate School of Life Sciences, Tohoku University
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Oshiki M, Araki M, Hirakata Y, Hatamoto M, Yamaguchi T, Araki N. Ureolytic Prokaryotes in Soil: Community Abundance and Diversity. Microbes Environ 2018; 33:230-233. [PMID: 29709896 PMCID: PMC6031400 DOI: 10.1264/jsme2.me17188] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Although the turnover of urea is a crucial process in nitrogen transformation in soil, limited information is currently available on the abundance and diversity of ureolytic prokaryotes. The abundance and diversity of the soil 16S rRNA gene and ureC (encoding a urease catalytic subunit) were examined in seven soil types using quantitative PCR and amplicon sequencing with Illumina MiSeq. The amplicon sequencing of ureC revealed that the ureolytic community was composed of phylogenetically varied prokaryotes, and we detected 363 to 1,685 species-level ureC operational taxonomic units (OTUs) per soil sample, whereas 5,984 OTUs were site-specific OTUs found in only one of the seven soil types.
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Affiliation(s)
- Mamoru Oshiki
- Department of Civil Engineering, National Institute of Technology, Nagaoka College
| | - Mitsuru Araki
- Department of Civil Engineering, National Institute of Technology, Nagaoka College
| | - Yuga Hirakata
- Department of Science of Technology Innovation, Nagaoka University of Technology
| | - Masashi Hatamoto
- Department of Environmental Systems Engineering, Nagaoka University of Technology
| | - Takashi Yamaguchi
- Department of Science of Technology Innovation, Nagaoka University of Technology
| | - Nobuo Araki
- Department of Civil Engineering, National Institute of Technology, Nagaoka College
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Guo Y, Zhang M, Liu Z, Tian X, Zhang S, Zhao C, Lu H. Modeling and Optimizing the Synthesis of Urea-formaldehyde Fertilizers and Analyses of Factors Affecting these Processes. Sci Rep 2018. [PMID: 29540771 PMCID: PMC5852125 DOI: 10.1038/s41598-018-22698-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Previous research into the synthesis of urea-formaldehyde fertilizers was mostly based on orthogonal experimental designs or single factor tests; this led to low precision for synthesis and relatively large ranges of parameters for these processes. To obtain mathematical response models for the synthesis of urea-formaldehyde fertilizers with different nitrogen release properties, a central composite design (CCD) of response surface methodology was used in our research to examine the effects of different reaction times, temperatures, and molar ratios on nitrogen insoluble in either hot or cold water. Our results showed that nitrogen insoluble in cold or hot water from urea-formaldehyde fertilizers were mainly affected by urea: formaldehyde molar ratios. Also, quadratic polynomial mathematical models were established for urea-formaldehyde. According to the models, the optimal process parameters which maximize cold-water-insoluble nitrogen and minimize hot-water-insoluble nitrogen for the synthesis of urea formaldehyde were as follows urea: formaldehyde molar ratio was 1.33, reaction temperature was 43.5 °C, and reaction time was 1.64 h. Under these conditions, the content of cold-water-insoluble nitrogen was 22.14%, and hot-water-insoluble nitrogen was 9.87%. The model could be an effective tool for predicting properties of urea-formaldehyde slow release fertilizers if the experimental conditions were held within the design limits.
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Affiliation(s)
- Yanle Guo
- National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, College of Resources and Environment, Shandong Agricultural University, Taian, Shandong, 271018, China
| | - Min Zhang
- National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, College of Resources and Environment, Shandong Agricultural University, Taian, Shandong, 271018, China. .,State Key Laboratory of Nutrition Resources Integrated Utilization, Kingenta Ecological Engineering Group Co., Ltd., Linshu, 276700, China.
| | - Zhiguang Liu
- National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, College of Resources and Environment, Shandong Agricultural University, Taian, Shandong, 271018, China.
| | - Xiaofei Tian
- National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, College of Resources and Environment, Shandong Agricultural University, Taian, Shandong, 271018, China
| | - Shugang Zhang
- National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, College of Resources and Environment, Shandong Agricultural University, Taian, Shandong, 271018, China
| | - Chenhao Zhao
- National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, College of Resources and Environment, Shandong Agricultural University, Taian, Shandong, 271018, China
| | - Hao Lu
- National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, College of Resources and Environment, Shandong Agricultural University, Taian, Shandong, 271018, China
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Guo Y, Liu Z, Zhang M, Tian X, Chen J, Sun L. Synthesis and Application of Urea-Formaldehyde for Manufacturing a Controlled-Release Potassium Fertilizer. Ind Eng Chem Res 2018. [DOI: 10.1021/acs.iecr.7b04629] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yanle Guo
- National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, National Engineering & Technology Research Center for Slow and Controlled Release Fertilizers, College of Resources and Environment, Shandong Agricultural University, Tai’an, Shandong 271018, China
| | - Zhiguang Liu
- National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, National Engineering & Technology Research Center for Slow and Controlled Release Fertilizers, College of Resources and Environment, Shandong Agricultural University, Tai’an, Shandong 271018, China
| | - Min Zhang
- National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, National Engineering & Technology Research Center for Slow and Controlled Release Fertilizers, College of Resources and Environment, Shandong Agricultural University, Tai’an, Shandong 271018, China
| | - Xiaofei Tian
- National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, National Engineering & Technology Research Center for Slow and Controlled Release Fertilizers, College of Resources and Environment, Shandong Agricultural University, Tai’an, Shandong 271018, China
| | - Jianqiu Chen
- State Key Laboratory
of Nutrition Resources Integrated Utilization, Kingenta Ecological
Engineering Group Co., Ltd., Linshu, Shandong 276700, China
| | - Lingli Sun
- Zhongde Fertilizer
(Pingyuan) Co. Ltd., De’zhou, Shandong 253100, China
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González-Hurtado M, Rieumont-Briones J, Castro-González LM, Zumeta-Dube I, Galano A. Combined experimental–theoretical investigation on the interactions of Diuron with a urea–formaldehyde matrix: implications for its use as an “intelligent pesticide”. CHEMICAL PAPERS 2017. [DOI: 10.1007/s11696-017-0245-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Zhou Z, Du C, Li T, Shen Y, Zeng Y, Du J, Zhou J. Biodegradation of a biochar-modified waterborne polyacrylate membrane coating for controlled-release fertilizer and its effects on soil bacterial community profiles. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2015; 22:8672-82. [PMID: 25567059 DOI: 10.1007/s11356-014-4040-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2014] [Accepted: 12/22/2014] [Indexed: 05/17/2023]
Abstract
Biochar-modified polyacrylate-like polymers are promising waterborne polymer-based membrane coatings for controlled-release fertilizers. However, the effect of these membrane polymers on paddy soil is unknown. A soil incubation experiment was conducted using Fourier transform infrared photoacoustic spectroscopy to monitor the changes in the polymer-coated membranes in paddy soil, and Biolog EcoPlates and polymerase chain reaction-denaturing gradient gel electrophoresis were used to detect the effects of the membranes on soil bacterial community profiles. Compared to unmodified membranes, the biodegradation rate of the biochar-modified membrane was slower, and the membrane was more intact, which improved and guaranteed the controlled release of nutrients. Compared to the soil without membranes, the biochar-modified membranes, as well as unmodified ones, showed no significant impacts on the composition diversity of soil dominant bacterial community. The activity and functional diversity of soil culturable microbial community during the early stage of incubation were reduced by biochar-modified membranes due to the release of small amount of soluble organic materials but were both recovered in the 12(th) month of the incubation period. Therefore, the biochar-modified waterborne polyacrylate was environmentally friendly, demonstrating its potential both in the development of coated controlled-release fertilizers and in the utilization of crop residue.
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Affiliation(s)
- Zijun Zhou
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, 210008, Nanjing, China
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Ikeda S, Tokida T, Nakamura H, Sakai H, Usui Y, Okubo T, Tago K, Hayashi K, Sekiyama Y, Ono H, Tomita S, Hayatsu M, Hasegawa T, Minamisawa K. Characterization of leaf blade- and leaf sheath-associated bacterial communities and assessment of their responses to environmental changes in CO₂, temperature, and nitrogen levels under field conditions. Microbes Environ 2015; 30:51-62. [PMID: 25740174 PMCID: PMC4356464 DOI: 10.1264/jsme2.me14117] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2014] [Accepted: 11/10/2014] [Indexed: 01/12/2023] Open
Abstract
Rice shoot-associated bacterial communities at the panicle initiation stage were characterized and their responses to elevated surface water-soil temperature (ET), low nitrogen (LN), and free-air CO2 enrichment (FACE) were assessed by clone library analyses of the 16S rRNA gene. Principal coordinate analyses combining all sequence data for leaf blade- and leaf sheath-associated bacteria revealed that each bacterial community had a distinct structure, as supported by PC1 (61.5%), that was mainly attributed to the high abundance of Planctomycetes in leaf sheaths. Our results also indicated that the community structures of leaf blade-associated bacteria were more sensitive than those of leaf sheath-associated bacteria to the environmental factors examined. Among these environmental factors, LN strongly affected the community structures of leaf blade-associated bacteria by increasing the relative abundance of Bacilli. The most significant effect of FACE was also observed on leaf blade-associated bacteria under the LN condition, which was explained by decreases and increases in Agrobacterium and Pantoea, respectively. The community structures of leaf blade-associated bacteria under the combination of FACE and ET were more similar to those of the control than to those under ET or FACE. Thus, the combined effects of environmental factors need to be considered in order to realistically assess the effects of environmental changes on microbial community structures.
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Affiliation(s)
- Seishi Ikeda
- Memuro Research Station, Hokkaido Agricultural Research Center, National Agriculture and Food Research OrganizationShinsei, Memuro-cho, Kasai-gun, Hokkaido 082–0081Japan
| | - Takeshi Tokida
- National Institute for Agro-Environmental Sciences3–1–3 Kannondai, Tsukuba, Ibaraki 305–8604Japan
| | | | - Hidemitsu Sakai
- National Institute for Agro-Environmental Sciences3–1–3 Kannondai, Tsukuba, Ibaraki 305–8604Japan
| | - Yasuhiro Usui
- National Institute for Agro-Environmental Sciences3–1–3 Kannondai, Tsukuba, Ibaraki 305–8604Japan
| | - Takashi Okubo
- Graduate School of Life Sciences, Tohoku University2–1–1 Katahira, Aoba-ku, Sendai, Miyagi 980–8577Japan
| | - Kanako Tago
- National Institute for Agro-Environmental Sciences3–1–3 Kannondai, Tsukuba, Ibaraki 305–8604Japan
| | - Kentaro Hayashi
- National Institute for Agro-Environmental Sciences3–1–3 Kannondai, Tsukuba, Ibaraki 305–8604Japan
| | - Yasuyo Sekiyama
- National Food Research Institute, National Agriculture and Food Research Organization2–1–12 Kannondai, Tsukuba, Ibaraki 305–8642Japan
| | - Hiroshi Ono
- National Food Research Institute, National Agriculture and Food Research Organization2–1–12 Kannondai, Tsukuba, Ibaraki 305–8642Japan
| | - Satoru Tomita
- National Food Research Institute, National Agriculture and Food Research Organization2–1–12 Kannondai, Tsukuba, Ibaraki 305–8642Japan
| | - Masahito Hayatsu
- National Institute for Agro-Environmental Sciences3–1–3 Kannondai, Tsukuba, Ibaraki 305–8604Japan
| | - Toshihiro Hasegawa
- National Institute for Agro-Environmental Sciences3–1–3 Kannondai, Tsukuba, Ibaraki 305–8604Japan
| | - Kiwamu Minamisawa
- Graduate School of Life Sciences, Tohoku University2–1–1 Katahira, Aoba-ku, Sendai, Miyagi 980–8577Japan
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