Influences of different tillage and residue management systems on soil nematode community composition and diversity in the tropics

文献类型： 外文期刊

第一作者： Zhong, Shuang

作者： Zhong, Shuang;Jin, Zhi-qiang;Zhong, Shuang;Zeng, Hui-cai

作者机构：

关键词： Nematode;Community composition;Tillage;Residue;Metabolic footprint

期刊名称：SOIL BIOLOGY & BIOCHEMISTRY （ 影响因子：7.609； 五年影响因子：8.312 ）

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年卷期：

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收录情况： SCI

摘要： Soil nematode and microbial community composition in different tillage and residue systems were investigated in a 12-year old field experiment in Hainan Island. The experiment was based on a split-plot design with tillage system (conventional tillage, cony. till; reduced tillage, reduced till; no-tillage, no till) as main plots and residue management (0% residue input, 0% res.; 50% residue input, 50% res.; 100% residue input, 100% res.) as subplots. Soil samples were taken at depth of 0-40 cm in 2015-2016. A total of 56 nematode genera with relative abundance over 0.1% were identified. Rotylenchulus and Meloidbgyne in 0% res. cony. till were the dominant genera. In comparison with cony. till, reduced till and no till increased the number of protozoa, bacterivores and omnivore carnivores. In case of microflora, similar patterns were observed with greater abundance of bacteria and arbuscular mycorrhizal fungi in reduced till and no till than in cony. till. The residue addition soils favored bacterivores, fungivores and high colonizer-persister (c-p) value omnivores and carnivores, but less plant parasites. Soil food web in 50% res. no till, 100% res. reduced till and 100% res. no till treatments were highly structured, mature and moderately enriched as indicated by Structure (SI), Maturity (MI) and EnrichMent (El) indices, respectively. Higher number of bacterivores and lower values of Channel index (CI) suggested bacterial dominated decomposition in no -tillage soil. Nematode community analysis indicated that no -tillage with residue addition increased nematode abundance and their functional metabolic footprint, and favored a more diverse residue resource entry into soil food webs.

分类号： S1

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