Residue mulching has been adopted to improve soil organic carbon and to prevent soil erosion and degradation, which in turn promote the sustainable development of soil ecosystems. Nematode metabolic footprints provide information about the responses of nematodes to resources and also help in quantifying the contributions of nematodes to ecosystem functions and services. However, how production and respiration components of nematode metabolic footprints vary in different mulching amounts is less clear. Therefore, to explore the impact of different mulching amounts on the production and respiration of nematode trophic groups, soil samples were collected from four mulching treatments (without mulching, with 33%, 67%, and 100% mulching of the stover remaining at harvest) at the depths of 0–5 cm and 5–10 cm in a 12‐year long no‐tillage system. Our results proved that the mulching effect on the production and respiration of fungivores was significant, and the production was 71.8%, 62.7%, 71.5% higher and respiration was 67.7%, 61.9%, 70% higher in 100% mulching treatment than without mulching, 33% and 67% mulching, respectively. More basal C flowed into the fungal decomposition pathways and fungivores contributed more to soil carbon sequestration through the decomposition of recalcitrant nutrients from residue at the end of crop growth. There was higher production than respiration in bacterivores and an opposite trend was observed in fungivores. Residue mulching increased the metabolic footprints of nematode communities and carbon use efficiency of fungivores and omnivores and predators and then enhanced the potential of soil carbon sequestration through the metabolic process of different nematode trophic groups.

中文翻译：

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长期免耕系统中基于土壤线虫产生和呼吸作用的残茬覆盖量对代谢足迹的影响

残渣覆盖已被采用来改善土壤有机碳并防止土壤侵蚀和退化，从而促进了土壤生态系统的可持续发展。线虫的代谢足迹提供了有关线虫对资源的反应的信息，还有助于量化线虫对生态系统功能和服务的贡献。然而，线虫代谢足迹的生产和呼吸成分在不同覆盖量下如何变化尚不清楚。因此，为了探讨不同覆盖量对线虫营养组生产和呼吸的影响，从四种覆盖处理中收集了土壤样品（不覆盖，收获时剩余秸秆的覆盖率为33％，67％和100％）在长达12年的免耕系统中，深度为0–5 cm和5–10 cm。我们的结果证明，覆盖对真菌的生产和呼吸作用显着，与不覆盖相比，覆盖率在100％覆盖下的产量分别提高了71.8％，62.7％，71.5％，呼吸分别提高了67.7％，61.9％和70％。 ，分别有33％和67％的覆盖率。更多的基础碳流入真菌的分解途径，而真菌则通过在作物生长结束时从残留物中分解顽固性养分，对土壤碳固存的贡献更大。噬菌体的产量高于呼吸作用，而在真菌中则观察到相反的趋势。