| 2种稻虾共作模式对土壤有机氮矿化作用的影响 |
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| 引用本文： | 喻召雄,陶先法,贾睿,侯诒然,李子万,董寅,李冰,朱健.2种稻虾共作模式对土壤有机氮矿化作用的影响[J].南方农业学报,2022,53(5):1357-1367. |
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| 作者姓名： | 喻召雄 陶先法 贾睿 侯诒然 李子万 董寅 李冰 朱健 |
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| 作者单位： | 1 上海海洋大学水产与生命学院, 上海 200120;2 南京农业大学无锡渔业学院, 江苏无锡 214000;3 中国水产科学研究院淡水渔业研究中心/农业农村部稻渔综合种养生态重点实验室, 江苏无锡 214081 |
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| 基金项目： | 国家重点研究计划“蓝色粮仓科技创新”重点专项（2019YFD0900305）；现代农业产业技术体系建设专项（CARS-45-25） |
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| 摘 要： | 【目的】研究2种稻虾共作模式对稻田耕层下部土壤有机氮矿化作用的影响及相关微生物对矿化作用的响应机制，为稻虾共生模式中虾类对土壤氮素肥力的影响机理研究及制定氮肥施用方案提供理论依据。【方法】采用对比试验，测定分析稻—红螯螯虾共作模式（RC）与稻—罗氏沼虾共作模式（RM）耕层下部（10~20 cm）土壤有机氮矿化作用相关参...
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| 关 键 词： | 红螯螯虾 罗氏沼虾 有机氮矿化 土壤微生物群落 |
| 收稿时间： | 2021-12-02 |
Effects of two rice-shrimp co-cultural models on soil organic nitrogen mineralization |
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| YU Zhao-xiong,TAO Xian-fa,JIA Rui,HOU Yi-ran,LI Zi-wan,DONG Yin,LI Bing,ZHU Jian.Effects of two rice-shrimp co-cultural models on soil organic nitrogen mineralization[J].Journal of Southern Agriculture,2022,53(5):1357-1367. |
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| Authors: | YU Zhao-xiong TAO Xian-fa JIA Rui HOU Yi-ran LI Zi-wan DONG Yin LI Bing ZHU Jian |
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| Affiliation: | 1 College of Fisheries and Life Science, Shanghai Ocean University, Shanghai 200120, China;2 Wuxi Fisheries College, Nanjing Agricultural University, Wuxi, Jiangsu 214000, China;3 Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences/Key Laboratory of Integrated Rice-Fish Farming Ecology, Ministry of Agriculture and Rural Affairs, Wuxi, Jiangsu 214081, China |
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| Abstract: | 【Objective】To analyze the effects of rice-shrimp co-cultural model on lower arable stratum of paddy soil nitrogen mineralization and microbial response mechanism，so as to provide a theoretical reference for study on mechanism of shrimp on soil nitrogen fertility and formulation of nitrogen fertilizer application scheme.【Method】Comparison experiment was conducted to determine the parameters related to arable stratum（10-20 cm），soil organic nitrogen mineralization，soil nitrogen content and microbial community structure under rice-Cherax quadricarinatus co-cultural model （RC）and rice-Macrobrachium rosenbergii（RM）co-cultural model. Meanwhile，the correlation between microbial community and mineralization parameters was analyzed.【Result】Compared with the beginning period，contents of soil total nitrogen and ammonium nitrogen decreased at final stage，and no significant difference in total nitrogen content between the two models at beginning period（P>0.05）had been found，while the total nitrogen content of RC was significantly lower than RM，at final period（P<0.05，the same below）. The results showed that the cumulative mineralization，mineralization potential，and nitrogen mineralization ratio［131.21±2.12 mg/kg，242.62±5.18 mg/kg，（0.31±0.01）%］in RC were significantly higher than those in RM［119.85±1.36 mg/kg，217.51±1.83 mg/kg，（0.28±0.01）%］at the end of the experiment，respectively. Meanwhile，microbial community data showed that Shannon index of RC was significantly lower than that of RM at final period，and there were significant differences in community structure between RC and RM. In addition，the relative abundance of Actinobacteriota in RC was significantly higher than that in the RM，while the relative abundances of Desulfobacterota，Myxococcota，and Nitrospirota were significantly lower than that in the RM. Moreover，the correlation analysis showed that the cumulative nitrogen mineralization，mineralization potential，and the nitrogen mineralization rate were extremely positive corelated with the Actinobacteriota，Chloroflexi，and Proteobacteria（P< 0.01，the same below），but were extremely negative correlated with Bacteroidota，Desulfobacterota，Myxococcota，and Nitrospirota.【Conclusion】Different living habits of shrimp affect the composition of soil microbial community and create differences in arable stratum（10-20 cm）soil microbial community structure. Hence，In Jingjiang，Jiangsu Province，compared with the RM，there is stronger mineralization and higher values of the mineralization potential and other related parameters in RC，which is more beneficial to the growth of rice. |
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