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Zhu L, Zhao Y, Yang K, Chen J, Zhou H, Chen X, Liu Q, Wei Z. Host bacterial community of MGEs determines the risk of horizontal gene transfer during composting of different animal manures. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 250:166-174. [PMID: 30995570 DOI: 10.1016/j.envpol.2019.04.037] [Citation(s) in RCA: 85] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Revised: 03/31/2019] [Accepted: 04/06/2019] [Indexed: 05/12/2023]
Abstract
Mobile genetic elements (MGEs) play critical roles in transferring antibiotic resistance genes (ARGs) among different microorganisms in the environment. This study aimed to explore the fate of MGEs during chicken manure (CM) and bovine manure (BM) composting to assess horizontal transfer risks of ARGs. The results showed that the removal efficiency of MGEs during CM composting was significantly higher than that during BM composting, because the potential host bacteria of MGEs were eliminated largely during CM composting. Meanwhile, these potential host bacterial communities are significantly influenced by pH, NH4+, NO3- and total N, which can be used to regulate host bacterial communities to remove MGEs during composting. Projection pursuit regression further confirmed that composting can effectively reduce the horizontal transfer risk of ARGs, especially for CM composting. These results identified the critical roles of host bacterial communities in MGEs removal during composting of different animal manures.
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Affiliation(s)
- Longji Zhu
- Key Laboratory of Agricultural Microbiology of Heilongjiang Province Science and Technology Department, Northeast Agricultural University, Harbin, 150030, China; College of Life Science, Northeast Agricultural University, Harbin, 150030, China
| | - Yue Zhao
- Key Laboratory of Agricultural Microbiology of Heilongjiang Province Science and Technology Department, Northeast Agricultural University, Harbin, 150030, China; College of Life Science, Northeast Agricultural University, Harbin, 150030, China
| | - Kangjie Yang
- Key Laboratory of Agricultural Microbiology of Heilongjiang Province Science and Technology Department, Northeast Agricultural University, Harbin, 150030, China; College of Life Science, Northeast Agricultural University, Harbin, 150030, China
| | - Jian Chen
- Beijing Tongzhou Agriculture Products Quality Inspection & Testing Center, Beijing, 101149, China
| | - Haixuan Zhou
- Key Laboratory of Agricultural Microbiology of Heilongjiang Province Science and Technology Department, Northeast Agricultural University, Harbin, 150030, China; College of Life Science, Northeast Agricultural University, Harbin, 150030, China
| | - Xiaomeng Chen
- Key Laboratory of Agricultural Microbiology of Heilongjiang Province Science and Technology Department, Northeast Agricultural University, Harbin, 150030, China; College of Life Science, Northeast Agricultural University, Harbin, 150030, China
| | - Qi Liu
- Key Laboratory of Agricultural Microbiology of Heilongjiang Province Science and Technology Department, Northeast Agricultural University, Harbin, 150030, China; College of Life Science, Northeast Agricultural University, Harbin, 150030, China
| | - Zimin Wei
- Key Laboratory of Agricultural Microbiology of Heilongjiang Province Science and Technology Department, Northeast Agricultural University, Harbin, 150030, China; College of Life Science, Northeast Agricultural University, Harbin, 150030, China.
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Optimization on theBuried Depth of Subsurface Drainage under Greenhouse Condition Based on Entropy Evaluation Method. ENTROPY 2018; 20:e20110859. [PMID: 33266583 PMCID: PMC7512420 DOI: 10.3390/e20110859] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/11/2018] [Revised: 10/16/2018] [Accepted: 10/17/2018] [Indexed: 11/30/2022]
Abstract
Numerous indicators under the plant-soil system should be taken into consideration when developing an appropriate agricultural water conservancy project. Entropy evaluation method offers excellent prospects in optimizing agricultural management schemes. To investigate the impact of different buried depths (30, 45, 60, 75, 90, and 105 cm) of subsurface drainage pipes on greenhouse plant-soil systems, the tomato was employed as plant material, and the marketable yield, fruit sugar to acid ratio, soil electrical conductivity, nitrogen loss rate, as well as crop water and fertilizer use efficiency were observed. Based on these indicators, the entropy evaluation method was used to select the optimal buried depth of subsurface drainage pipes. Both the calculation results of objective and subjective weights indicated that tomato yield and soil electrical conductivity were relatively more crucial than other indexes, and their comprehensive weights were 0.43 and 0.34, respectively. The 45 cm buried depth possessed the optimal comprehensive benefits, with entropy evaluation value of 0.94. Under 45 cm buried depth, the loss rate of soil available nitrogen was 13.9%, the decrease rate of soil salinity was 49.2%, and the tomato yield, sugar to acid ratio, nitrogen use efficiency, and water use efficiency were 112 kg·ha−1, 8.3, 39.7%, and 42.0%, respectively.
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Experimental evaluation of artificial neural network for predicting drainage water and groundwater salinity at various drain depths and spacing. Neural Comput Appl 2017. [DOI: 10.1007/s00521-017-3155-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Cui HY, Zhao Y, Chen YN, Zhang X, Wang XQ, Lu Q, Jia LM, Wei ZM. Assessment of phytotoxicity grade during composting based on EEM/PARAFAC combined with projection pursuit regression. JOURNAL OF HAZARDOUS MATERIALS 2017; 326:10-17. [PMID: 27987445 DOI: 10.1016/j.jhazmat.2016.09.059] [Citation(s) in RCA: 88] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Revised: 09/14/2016] [Accepted: 09/26/2016] [Indexed: 06/06/2023]
Abstract
Improper treatment of organic waste may result in environmental pollution and harm to plant growth due to the high concentration of phytotoxin. Composting has widely been used for recycling organic waste and reducing phytotoxin to improve soil properties. Assessing the phytotoxicity grades of compost products is essential for achieving high quality compost to guarantee its marketability. In this study, a technique combined parallel factor (PARAFAC) of excitation-emission matrices (EEMs) spectroscopy with projection pursuit regression (PPR) was applied to improve the sensitivity of phytotoxicity assessment during composting. Results showed that composting reduced the concentration of phytotoxin, and increased the germination index (GI). Composts were divided into four grades based on GI values. Five components containing simple DOM (component C1 and C2) and complex DOM (component C3-C5) were successfully developed by PARAFAC. Correlation analysis between phytotoxicity, chemical indices and fluorescence components demonstrated that C1, C4, complex DOM, and the ratio of simple/complex DOM components were more suitable to assess phytotoxicity of composting products. These results revealed that PARAFAC/PPR enabled a rapid and accurate method to assess the phytotoxicity of compost materials for composting plant.
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Affiliation(s)
- Hong-Yang Cui
- College of Life Science, Northeast Agricultural University, Harbin 150030, China
| | - Yue Zhao
- College of Life Science, Northeast Agricultural University, Harbin 150030, China
| | - Yan-Ni Chen
- College of Life Science, Northeast Agricultural University, Harbin 150030, China
| | - Xu Zhang
- College of Life Science, Northeast Agricultural University, Harbin 150030, China
| | - Xue-Qin Wang
- College of Life Science, Northeast Agricultural University, Harbin 150030, China
| | - Qian Lu
- College of Life Science, Northeast Agricultural University, Harbin 150030, China
| | - Li-Ming Jia
- Environmental Monitoring Center of Heilongjiang Province, China
| | - Zi-Min Wei
- College of Life Science, Northeast Agricultural University, Harbin 150030, China.
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Chinese Electric Power Development Coordination Analysis on Resource, Production and Consumption: A Provincial Case Study. SUSTAINABILITY 2017. [DOI: 10.3390/su9020209] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Zhai Y, Yang Q, Wu Y. Soil Salt Distribution and Tomato Response to Saline Water Irrigation under Straw Mulching. PLoS One 2016; 11:e0165985. [PMID: 27806098 PMCID: PMC5091775 DOI: 10.1371/journal.pone.0165985] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Accepted: 10/20/2016] [Indexed: 11/24/2022] Open
Abstract
To investigate better saline water irrigation scheme for tomatoes that scheduling with the compromise among yield (Yt), quality, irrigation water use efficiency (IWUE) and soil salt residual, an experiment with three irrigation quotas and three salinities of irrigation water was conducted under straw mulching in northern China. The irrigation quota levels were 280 mm (W1), 320 mm (W2) and 360 mm (W3), and the salinity levels were 1.0 dS/m (F), 3.0 dS/m (S1) and 5.0 dS/m (S2). Compared to freshwater, saline water irrigations decreased the maximum leaf area index (LAIm) of tomatoes, and the LAIm presented a decline tendency with higher salinity and lower irrigation quota. The best overall quality of tomato was obtained by S2W1, with the comprehensive quality index of 3.61. A higher salinity and lower irrigation quota resulted in a decrease of individual fruit weight and an increase of the blossom-end rot incidence, finally led to a reduction in the tomato Yt and marketable yield (Ym). After one growth season of tomato, the mass fraction of soil salt in plough layer under S2W1 treatment was the highest, and which presented a decline trend with an increasing irrigation quota. Moreover, compared to W1, soil salts had a tendency to move to the deeper soil layer when using W2 and W3 irrigation quota. According to the calculation results of projection pursuit model, S1W3 was the optimal treatment that possessed the best comprehensive benefit (tomato overall quality, Yt, Ym, IWUE and soil salt residual), and was recommended as the saline water irrigation scheme for tomatoes in northern China.
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Affiliation(s)
- Yaming Zhai
- Key Laboratory of Efficient Irrigation-Drainage and Agricultural Soil-Water Environment in Southern China, Hohai University, Nanjing, 210098, China
- College of Water Conservancy and Hydropower, Hohai University, Nanjing 210098, China
| | - Qian Yang
- Henan Vocational College of Agriculture, Department of Gardening, Zhengzhou, China
| | - Yunyu Wu
- Key Laboratory of Efficient Irrigation-Drainage and Agricultural Soil-Water Environment in Southern China, Hohai University, Nanjing, 210098, China
- College of Water Conservancy and Hydropower, Hohai University, Nanjing 210098, China
- * E-mail:
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Hou M, Zhu L, Jin Q. Surface Drainage and Mulching Drip-Irrigated Tomatoes Reduces Soil Salinity and Improves Fruit Yield. PLoS One 2016; 11:e0154799. [PMID: 27153110 PMCID: PMC4859519 DOI: 10.1371/journal.pone.0154799] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2016] [Accepted: 04/19/2016] [Indexed: 11/19/2022] Open
Abstract
A study on the effects of mulched drip irrigation combined with surface drainage on saline soil and tomatoes was conducted in coastal areas of eastern China, where the crops are subjected to excessive salt. The treatments contained three irrigation rates—200, 250 and 300 m3/ha—and three drain ditch depths—10, 20 and 30 cm. The contents of soil salinity, organic matter and available nutrient were observed, and the tomato plant height, stem diameter and leaf area index during different growth periods were recorded. Results showed that the total removal rate of salt from soil at a 0–1 m depth was 8.7–13.2% for the three drainages. Compared with the control, the treatments increased the content of available N (by 12.1–47.1%) and available K (by 5.0–21.9%) in the soils inside the mulch and decreased the content of available N (by 3.4–22.1%) and available K (by 7.5–16.4%) in the soils outside the mulch. For tomatoes, the plant height and the stem diameter was increased significantly by the irrigations but was not significantly affected by the drainages, and the leaf area index was increased by 0.39~1.76, 1.10~2.90 and 2.80~6.86 respectively in corresponding to the seedling, flowering and fruit-set stage. Moreover, yield-increase rates of 7.9–27.6% were found for the treatments compared to the control with a similar amount of applied water.
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Affiliation(s)
- Maomao Hou
- College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou, Fujian province, China
- * E-mail:
| | - Lvdan Zhu
- Institute of Water Conservancy and Ecological Engineering, Nanchang Institute of Engineering, Nanchang, Jiangxi province, China
| | - Qiu Jin
- Institute of Water Conservancy Science of Jiangsu Province, Nanjing, Jiangsu province, China
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Zhai Y, Yang Q, Hou M. The Effects of Saline Water Drip Irrigation on Tomato Yield, Quality, and Blossom-End Rot Incidence --- A 3a Case Study in the South of China. PLoS One 2015; 10:e0142204. [PMID: 26540394 PMCID: PMC4634986 DOI: 10.1371/journal.pone.0142204] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2015] [Accepted: 10/19/2015] [Indexed: 11/25/2022] Open
Abstract
Saline water resources are abundant in the coastal areas of south China. Most of these resources still have not been effectively utilized. A 3-year study on the effects of saline water irrigation on tomato yield, quality and blossom-end rot (BER) was conducted at different lower limits of soil matric potential (-10 kPa, -20 kPa, -30 kPa, -40 kPa and -50 kPa). Saline water differing in electrical conductivity (EC) (3 dS/m, 4 dS/m, 4.5 dS/m, 5 dS/m and 5.5 dS/m) was supplied to the plant after the seedling establishment. In all three years, irrigation water with 5.5 dS/m salinity reduced the maximum leaf area index (LAIm) and chlorophyll content the most significantly when compared with other salinity treatments. However, compared with the control treatment (CK), a slight increase in LAIm and chlorophyll content was observed with 3~4 dS/m salinity. Saline water improved tomato quality, including fruit density, soluble solid, total acid, vitamin C and the sugar-acid ratio. There was a positive relationship between the overall tomato quality and salinity of irrigation water, as analyzed by principal component analysis (PCA). The tomato yield decreased with increased salinity. The 5.5 dS/m treatment reduced the tomato yield (Yt) by 22.4~31.1%, 12.6~28.0% and 11.7~27.3%, respectively in 2012, 2013 and 2014, compared with CK. Moreover, a significant (P≤0.01) coupling effect of salinity and soil matric potential on Yt was detected. Saline water caused Yt to increase more markedly when the lower limit of soil matric potential was controlled at a relatively lower level. The critical salinity level that produced significant increases in the BERi was 3 dS/m~4 dS/m. Following the increase in BERi under saline water irrigation, marketable tomato yield (Ym) decreased by 8.9%~33.8% in 2012, 5.1%~30.4% in 2013 and 10.1%~32.3% in 2014 compared with CK. In terms of maintaining the Yt and Ym, the salinity of irrigation water should be controlled under 4 dS/m, and the lower limit of soil matric potential should be greater than -20 kPa.
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Affiliation(s)
- Yaming Zhai
- Key Laboratory of Efficient Irrigation-Drainage and Agricultural Soil-Water Environment in Southern China (Hohai University), Ministry of Education, Nanjing, China
- College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing, China
| | - Qian Yang
- Henan Vocational College of Agriculture, Department of Gardening, Zhengzhou, China
| | - Maomao Hou
- Key Laboratory of Efficient Irrigation-Drainage and Agricultural Soil-Water Environment in Southern China (Hohai University), Ministry of Education, Nanjing, China
- College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou, Fujian, China
- * E-mail:
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Effects of different regulatory methods on improvement of greenhouse saline soils, tomato quality, and yield. ScientificWorldJournal 2014; 2014:953675. [PMID: 25147873 PMCID: PMC4122107 DOI: 10.1155/2014/953675] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2014] [Revised: 06/19/2014] [Accepted: 06/23/2014] [Indexed: 11/17/2022] Open
Abstract
To identify effective regulatory methods scheduling with the compromise between the soil desalination and the improvement of tomato quality and yield, a 3-year field experiment was conducted to evaluate and compare the effect of straw mulching and soil structure conditioner and water-retaining agent on greenhouse saline soils, tomato quality, and yield. A higher salt removing rate of 80.72% in plough layer with straw mulching was obtained based on the observation of salt mass fraction in 0 ~ 20 cm soil layer before and after the experiment. Salts were also found to move gradually to the deeper soil layer with time. Straw mulching enhanced the content of soil organic matter significantly and was conductive to reserve soil available N, P, and K, while available P and K in soils of plough layer with soil structure conditioner decreased obviously; thus a greater usage of P fertilizer and K fertilizer was needed when applying soil structure conditioner. Considering the evaluation indexes including tomato quality, yield, and desalination effects of different regulatory methods, straw mulching was recommended as the main regulatory method to improve greenhouse saline soils in south China. Soil structure conditioner was the suboptimal method, which could be applied in concert with straw mulching.
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