文献类型： 外文期刊
第一作者： Chen, Yunfeng
作者： Chen, Yunfeng;Chen, Yunfeng;Hu, Ning;Li, Zhongfang;Zhang, Qingzhong;Lou, Yilai;Hu, Ning;Li, Zhongfang;Tang, Zheng;Kuzyakov, Yakov;Wang, Yidong;Kuzyakov, Yakov
作者机构：
关键词： Soil food web; Top-down control; Bottom-up control; Nematode community; Green manure
期刊名称：APPLIED SOIL ECOLOGY （ 影响因子：4.046； 五年影响因子：4.884 ）
ISSN： 0929-1393
年卷期： 2019 年 138 卷
页码：
收录情况： SCI
摘要： Chinese milk vetch (CMV) is widely used as a green manure due to its efficiency for nutrient preservation and soil fertility improvement, as well for providing more organic substances for soil organisms. Detritus micro-food web drives carbon and nutrient cycling and maintains ecosystem productivity. The effects of CMV amendment on detritus micro-food web were investigated in a six-year field experiment. Compared to the mineral fertilizers (NPK) alone, the fertilizers combined with CMV (NPK + CMV) increased soil organic carbon content, and thus enhanced the biomass of microorganisms, as well as protozoa abundance, while did not change micro-feeding nematode abundance (MN). This indicates a substrate-driven bottom-up effect. However, the green manure application increased omnivores-predators (OP) abundance and the OP/MN ratio, suggesting a top-down effect. Higher F/B ratio indicates a shift of the food web energy structure towards to fungi-dominated channel in the manured soil. Here, the green manure amendment should be encouraged to improve soil detritus micro-food web.
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