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Combining organic and inorganic fertilization increases rice yield and soil nitrogen and carbon: dissolved organic matter chemodiversity and soil microbial communities

文献类型： 外文期刊

作者： Xu, Yanggui 1 ; Peng, Zhiping 1 ; Tu, Yuting 1 ; Huang, Jichuan 1 ;

作者机构： 1.Guangdong Acad Agr Sci, Inst Agr Resources & Environm, Jinying Rd, Guangzhou 510640, Peoples R China

2.Minist Agr, Key Lab Plant Nutr & Fertilizer South Reg, Jinying Rd, Guangzhou 510640, Peoples R China

3.Guangdong Key Lab Nutrient Cycling & Farmland Cons, Jinying Rd, Guangzhou 510640, Peoples R China

关键词： Paddy field; Fertilization treatment; Dissolved organic matter composition; Bacterial communities; Net nitrogen mineralization; Yield

期刊名称：PLANT AND SOIL （ 影响因子：4.9； 五年影响因子：5.2 ）

ISSN： 0032-079X

年卷期： 2023 年

页码：

收录情况： SCI

摘要： Background and aimsDissolved organic matter (DOM) is an active component of the soil organic carbon (SOC) and nitrogen (N) pool. However, the relationship between DOM chemodiversity and microbial communities, and their effects on the C and N in paddy fields under organic or inorganic fertilization, are poorly understood but important for sustainable agricultural production.MethodsWe conducted a six-year experiment in paddy fields under the following different organic and inorganic fertilizer treatments: no fertilizer (CK), chemical fertilizer (150 kg & BULL;hm(-2) N; CF), 50% N from chemical fertilizer + 50% N from decomposed cattle manure (CMF50), and manure fertilizer (100% N from decomposed cattle manure; MF).ResultsCMF50 exhibited the highest yield (10.89% increase compared with CF). MF and CMF50 enriched the availability and content of soil N, which in turn exhibited a strong effect on net N mineralization and increased SOC and the amount of recalcitrant components of DOM. However, the continuous use of CF led to an increase in both soil bulk density and the number of anaerobic organisms Anaerolinea and Bellilinea. The fractions of DOM containing lignin-like and lipid-like compounds were strongly correlated with Anaerolinea and Bellilinea and contributed to net N mineralization and SOC. Continuous use of CF facilitated net N mineralization but decreased both DOC and SOC.ConclusionsContinuous applications of CMF50 and MF improved the microbial communities and increased the recalcitrant components of DOM, thus highlighting the importance of the relationship between DOM composition and soil microbial communities while assessing the soil N and SOC.

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