Effects of long-term straw incorporation on nematode community composition and metabolic footprint in a rice–wheat cropping system
Effects of long-term straw incorporation on nematode community composition and metabolic footprint in a rice–wheat cropping system作者机构：Key Laboratory of Fertilization from Agricultural WastesMinistry of Agriculture and Rural Affairs/Institute of Plant Protection and Soil FertilizerHubei Academy of Agricultural SciencesWuhan 430064P.R.China
出 版 物：《Journal of Integrative Agriculture》 (农业科学学报（英文版）)
年 卷 期：2021年第20卷第8期
页 面：2265-2276页
核心收录：
学科分类：0710[理学-生物学] 0832[工学-食品科学与工程（可授工学、农学学位）] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 1004[医学-公共卫生与预防医学(可授医学、理学学位)] 07[理学] 0905[农学-畜牧学] 0906[农学-兽医学] 0901[农学-作物学] 0703[理学-化学] 0902[农学-园艺学] 0713[理学-生态学]
基 金：This study was funded by the Open Project of Key Laboratory of the Ministry of Agriculture and Rural Affairs,China(KLFAW201705) the National Natural Science Foundation of China(31870501) the Technological Achievements Cultivation Project of Hubei Academy of Agricultural Sciences(2017CGPY01) the Key Project of Technological Innovation in Hubei Province,China(2018ABA091)
主 题：soil nematodes community composition metabolic footprint straw incorporation rice-wheat cropping system top-down effect
摘 要：Soil nematode communities can provide valuable information about the structure and functions of soil food webs,and are sensitive to agricultural practices,including short-term straw ***,currently,such effects under longterm straw incorporation conditions at different fertility levels are largely ***,we conducted a 13-year ongoing experiment to evaluate the effects of long-term straw incorporation on the structure and functions of the soil food web in low and high fertility soils through analyzing its effects on nematode communities,food web indices and metabolic *** treatments were included:straw removal(–S)under non-fertilized(–NPK)or fertilized(+NPK)conditions;and straw incorporation(+S)under–NPK or+NPK *** samples from a 0–20 cm depth layer were collected when wheat and rice were *** with straw removal,straw incorporation increased the abundances of total nematodes,bacterivores,plant-parasites and omnivores-predators,as well the relative abundances of omnivores-predators with increases of 73.06,89.29,95.31,238.98,and 114.61%in–NPK soils and 16.23,2.23,19.01,141.38,and 90.23%in+NPK soils,*** of sampling times and fertilization effects,straw incorporation increased the diversity and community stability of nematodes,as indicated by the Shannon-Weaver diversity index and maturity *** and structure index did not show significant responses to straw incorporation,but a slight increase was observed in the structure *** analysis of nematode metabolic footprints showed that straw incorporation increased the plant-parasite footprint and structure footprint by 97.27 and 305.39%in–NPK soils and by 11.29 and 149.56%in+NPK soils,but did not significantly influence enrichment,bacterivore and fungivore *** conclusion,long-term straw incorporation,particularly under a low fertility level,favored the soil nematodes and regulated the soil food web mainly via a top-down
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