刘割对半干旱草地土壤线虫群落结构的影响

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中图分类号：S812.2 文献标识码：A 文章编号：1007-0435（2026）02-0601-10

Abstract：Soil nematodes are pivotal for material cycling and energy flow in grassand ecosystems. Clipping is a widespread grassand management practice in northern China. However，the mechanisms by which clipping ffects the composition and structure of soil nematode communities remain unclear. nematode functional footprints across plant communities remain poorly understood.This experiment examined how clipping influenced soil nematodecomposition，structure，and functional footprint across six plant communities in the typical steppe of Iner Mongolia，providing a theoretical basis for grassland ecosystem management.Clipping significantly increased the total abundance of soil nematodes，the relative abundance of bacterivores，the maturity index，and the Wasilewska index.At the same time，it reduced the relative abundance of plant parasitic nematodes，the nutritional diversity index，the Shannon-Wiener index，the evenness index，and theenrichment index.Fauna analysis revealed that clipping increased the functional footprint of soil nematodes and food web complexity， while it reduced the enrichment index. Soil nematode community composition was significantly afected by soil nitrate nitrogen content，total carbon content，and liter mass.Our results demonstrated that clipping restructured nematode community composition，reducing plant parasitic nematodes’abundance，thereby improving soil nutrient functions and promoting plant growth. This study concludes that clipping effectively maintains soil nematode community structure in typical steppe，ofering a science-based framework for sustainable grassland management in northern China.

Key Words：Semi-arid grassland ;Clipping;Soil nematodes;Fauna analysis ;Biodiversity

土壤线虫在土壤食物网中占据多个营养级，在促进养分循环、维持土壤生物多样性以及改善土壤质量等方面发挥着重要作用[1-2]。（剩余15897字）