数字农科院2.0

Maize residue retention shapes soil microbial communities and co-occurrence networks upon freeze-thawing cycles

文献类型： 外文期刊

作者： Yang Yu;Quankuan Guo;Shuhan Zhang;Yupeng Guan;Nana Jiang;Yang Zhang;Rong Mao;Keyu Bai;Salimjan Buriyev;Nuriddin Samatov;Ximei Zhang;Wei Yang

作者机构：

关键词： Bacteria;Co-occurrence network;Freezing-thawing cycles;Fungi;Maize residue retention;Soil quality

期刊名称： PeerJ

ISSN： 2167-8359

年卷期： 2024 年 12 卷 6 期

页码：

收录情况： SCIE（2024版）

摘要： Maize residue retention is an effective agricultural practice for improving soil fertility in black soil region, where suffered from long freezing-thawing periods and intense freeze- thawing (FT) cycles. However, very few studies have examined the influence of maize residue retention on soil microbial communities under FT cycles. We investigated the response of soil microbial communities and co-occurrence networks to maize residue retention at different FT intensities over 12 cycles using a microcosm experiment conditioned in a temperature incubator. Our results indicated that maize residue retention induced dramatic shifts in soil archaeal, bacterial and fungal communities towards copiotroph-dominated communities. Maize residue retention consistently reduced soil fungal richness across all cycles, but this effect was weaker for archaea and bacteria. Normalized stochastic ratio analysis revealed that maize residue retention significantly enhanced the deterministic process of archaeal, bacterial and fungal communities. Although FT intensity significantly impacted soil respiration, it did not induce profound changes in soil microbial diversity and community composition. Co- occurrence network analysis revealed that maize residue retention simplified prokary- otic network, while did not impact fungal network complexity. The network robustness index suggested that maize residue retention enhanced the fungal network stability, but reduced prokaryotic network stability. Moreover, the fungal network in severe FT treatment harbored the most abundant keystone taxa, mainly being cold-adapted fungi. By identifying modules in networks, we observed that prokaryotic Module #1 and fungal Module #3 were enhanced by maize residue retention and contributed greatly to soil quality. Together, our results showed that maize residue retention exerted stronger influence on soil microbial communities and co-occurrence network patterns than FT intensity and highlighted the potential of microbial interactions in improving soil functionality.

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