Response of soil nematode community composition and diversity to different crop rotations and tillage 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： Nematodes;Community composition;Tillage;Rotation;Monoculture;Metabolic footprint

期刊名称：APPLIED SOIL ECOLOGY （ 影响因子：4.046； 五年影响因子：4.884 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： Soil nematode community composition and diversity response to banana-pineapple (BA), banana papaya (BP), banana-rice (BR) rotations and banana monoculture (CK) (12-year annual crops) under no-tillage (NT) and conventional tillage (CT) were assessed in the Wanzhong Farm in Hainan Island, China. Soil samples were taken at depth of 0-40 cm in 2014-2015. A total of 47 nematode genera with relative abundance over 0.1% were identified. Acrobeloides in RANT and BRCT, Aphelenchus in BANT, BACT, BRNT and BRCF, Helicotylenchus, Rotylenchulus and Meloidogyne in CKNT and CKCT were the dominant genera. In comparison with CK, BA, BP and BR increased the number of bacterivores, fungivores and omnivore-carnivores, and the concentration of bacterial PLFA and fungal PLFA. The no-tillage soils favored bacterivores, fungivores and high colonizer-persister (c-p) value omnivores and carnivores, but reduced plant parasites. Soil food web in the rotation combined with no-tillage systems was highly structured, mature and moderately enriched as indicated by Structure (SI), Maturity (MI) and Enrichment (EI) index values, respectively. Higher number of bacterivores and lower values of Channel index (CI) suggested bacterial-dominated decomposition in no-tillage soil. Soil nematode diversity and functional metabolic footprint were much greater after 12 years of crop rotation. The descriptive indicators were useful to provide insight into the effect of rotation and tillage, and the evaluative indicators were more comprehensive for interpreting the structure and function of the soil food web under different crop rotations and tillage. (C) 2016 Elsevier B.V. All rights reserved.

分类号： S154.1

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