Straw coverage alleviates seasonal variability of the topsoil microbial biomass and activity

文献类型： 外文期刊

第一作者： Lou, Yilai

作者： Lou, Yilai;Liang, Wenju;Lou, Yilai;Xu, Minggang;He, Xinhua;Wang, Yidong;Zhao, Kai

作者机构：

关键词： soil carbon;soil nitrogenChina: Asia;Palearctic region;seasonal variability;soil moisture;microbial activity;basal respiration;soil porosity;straw coverage;soil physical environment;topsoil microbial biomass;conventional straw removal

期刊名称：CATENA （ 影响因子：5.198； 五年影响因子：5.594 ）

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年卷期：

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收录情况： SCI

摘要： Straw coverage on soil surface is a well-known practice for conserving soil and water. Seasonal variability of microbial biomass carbon (MBC) and basal respiration (BR) in surface soil (0-5 cm) was compared between conventional straw removal (SR) and straw coverage (SC) in a maize (Zea mays L.) field experiment, Northeast China. The straw coverage treatment significantly increased microbial energy, carbon and nutrient sources (soil C and N contents) and improved soil physical environment (moisture and porosity), and thus stimulated MBC and BR across the growth season of maize, as compared to the straw removal treatment. MBC and BR showed similar seasonal trends in soil temperature, with maximum values in summer. In both study years, the straw coverage treatment reduced seasonal variation of soil temperature, therefore it significantly moderated seasonal variability of MBC and BR. Our results demonstrate that straw coverage contributes to stabilizing soil microbial characteristics in season

分类号： S15

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