Effect of row spacings on soil nematode communities and ecosystem multifunctionality at an aggregate scale

文献类型： 外文期刊

第一作者： Zhang, Guizong

作者： Zhang, Guizong;Kou, Xinchang;Zhang, Xiaoke;Liang, Wenju;Bai, Wei;Kou, Xinchang;Zhang, Guizong

作者机构：

期刊名称：SCIENTIFIC REPORTS （ 影响因子：4.379； 五年影响因子：5.133 ）

ISSN： 2045-2322

年卷期： 2020 年 10 卷 1 期

页码：

收录情况： SCI

摘要： Effect of crop row spacing on the belowground ecosystem, especially at an aggregate scale, remains unexplored. To explore how row spacing influenced nematode community and ecosystem function at the aggregate scale, four row spacings i.e. equidistant-row (ER, 50 cm-inter-row distance, 33 cm-intra-row between plants in each row) and non-equidistant-row including NR1 (100cm + 50cm row distance and 22cm intra-row), NR2 (100cm + 50cm inter-row and 25cm intra-row), and NR3 (60cm+40cm inter-row and 33cm intra-row) were compared, and four soil aggregate fractions i.e. >2mm, 1-2mm, 0.25-1mm and <0.25mm were separated. Row spacing did not impact C and N, but significantly influenced P. The regulation effect of acid phosphatase on soil available P was aggregate-scale dependent. Nematode faunal analysis indicated that NR3 within 0.25-1mm was less disturbed or relatively undisturbed environments. Structural equation model showed row spacing pattern directly affected multifunctionality, while aggregate fractions indirectly contributed to multifunctionality mainly by regulating the richness of total nematodes and trophic groups. It was concluded that NR3 had potential to construct more stable food web, and therefore was possibly the suitable planting pattern.

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