Jiangsu Key Laboratory for Microbes and Functional Genomics, Jiangsu Engineering and Technology Research Center for Industrialization of Microbial Resources, College of Life Sciences, Nanjing Normal University, Nanjing, 210023, Jiangsu, China.
Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Science, Nanjing, 210014, Jiangsu, China.
Curr Microbiol. 2022 Apr 27;79(6):172. doi: 10.1007/s00284-022-02863-z.
Rice-wheat rotation is one of the most intensive agricultural planting modes in China and is pivotal to develop optimized straw-returning management in situ to improve soil fertility and productivity in agricultural ecosystems. Previous studies have mainly focused on the effects of straw return with a single application of organic fertilizers. The integrated management of different fertilizers in improving the management of straw return in situ is not well known. In this study, a field experiment was conducted from 2017 to 2019 to explore the effects of a combined system of modified organic substrate (MOS) and straw-degrading compound microbial agent (CMA) on soil physiochemical properties, labile organic carbon, microbial activities, and soil microbial community composition under the background of direct crop straw return and chemical fertilizer utilization. Four treatments were designed: (1) control check; (2) CMA; (3) MOS; and (4) MOS + CMA. The results showed that the MOS + CMA treatment had the combined advantages of soil organic matter (SOM) accumulation, soil nutrient increase and soil microbial community alteration, which may be more suitable for improving the quality and fertility of sandy loam soil. This study provides novel insights for further understanding the effects of organic substrates and composite microbial agents on SOM changes and microbial community composition and function in the field, which has important implications for sustainable crop production and agricultural development.
水稻-小麦轮作是中国最集约化的农业种植模式之一，对发展优化的原位秸秆还田管理以提高农业生态系统的土壤肥力和生产力至关重要。以前的研究主要集中在单一施用有机肥对秸秆还田的影响上。不同肥料的综合管理在改善原位秸秆还田管理方面的作用尚不清楚。本研究于 2017 年至 2019 年进行了田间试验，以探索在直接作物秸秆还田和化肥利用的背景下，改良有机基质（MOS）和秸秆降解复合微生物剂（CMA）联合系统对土壤理化性质、活性有机碳、微生物活性和土壤微生物群落组成的影响。设计了四种处理：（1）对照；（2）CMA；（3）MOS；和（4）MOS+CMA。结果表明，MOS+CMA 处理具有土壤有机质（SOM）积累、土壤养分增加和土壤微生物群落改变的综合优势，可能更适合提高砂壤土的质量和肥力。本研究为进一步了解有机基质和复合微生物剂对田间 SOM 变化和微生物群落组成和功能的影响提供了新的见解，对可持续作物生产和农业发展具有重要意义。
