Intercropping outweighs straw incorporation driving community and functional diversity of microarthropods after 5 years of tillage practices

文献类型： 外文期刊

第一作者： Liu, Yuhang

作者： Liu, Yuhang;Gao, Qiang;Sun, Xin;Wang, Bin;Sun, Xin;Liu, Yuhang;Wang, Yongjun;Yao, Fanyun;Wang, Bin;Sun, Xin;Wu, Haitao;Sun, Xin

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关键词： Maize-peanut intercropping; Microarthropods; Straw incorporation; Sustainable agriculture

期刊名称：AGRICULTURE ECOSYSTEMS & ENVIRONMENT （ 影响因子：6.4； 五年影响因子：6.8 ）

ISSN： 0167-8809

年卷期： 2025 年 377 卷

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收录情况： SCI

摘要： Crop-leguminous intercropping and straw incorporation are considerable approaches to sustainable agriculture and have been widely used as a coping strategy to mitigate the negative effects caused by intensive agriculture. Yet, as a sustainable agriculture requires a deeper understanding of the impacts of conservation tillage practices on soil fauna, such as collembolans and acarid mites. These organisms are considered the most abundant and functionally critical soil fauna in many terrestrial natural, agricultural, and urban systems. In the present study, we assessed the responses of the community and functional diversity of collembolan and acarid mite assemblages to long-term intercropping and straw incorporation practices in a temperate farming land, in China. The experimental site was established with a fullfactorial design of conservation managements (maize monocropping, maize-peanut intercropping, without maize straw addition, and with maize straw addition) over five consecutive years. Results showed that intercropping doubled collembolan and acarid density. Most of the enriched species in the intercropping field were euedaphic collembolans and cleptoparasitic mites. Nonetheless, the density of most phoretic species decreased, resulting in a negative effect of intercropping on acarid diversity. Despite straw incorporation additionally boosting the intercropping-induced increases in biomass, richness, and density of the collembolan community, the effects of straw incorporation on the community structure of collembolans and acarid mites were negligible. Similarly, intercropping affected the functional composition of collembolans and mites differently. Intercropping favored euedaphic collembolans characterized by less-developed furca, ocelli and sexual reproduction, but fungivorous, and benefited the cleptoparasitic mites that might be transported by their provisional hosts during pollinating peanut flowers. Moreover, intercropping decreased the functional dispersion of acarid mites, resulting in an acarid community with a homogenized ecological niche of acarid mites. In contrast, the ecological niche was more differentiated. Similar to intercropping, the ecological niche of collembolans in the field with straw was relatively higher, as well as the functional divergence, suggesting more intense resource competition between collembolans. In conclusion, intercropping has species-specific effects on the community and functional diversity of collembolans and mites and is relatively beneficial to collembolans, whereas straw incorporation has a marginal advantage on collembolans and acarid mites.

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