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首页> 外文期刊>Applied Soil Ecology >Soil texture and straw type modulate the chemical structure of residues during four-year decomposition by regulating bacterial and fungal communities
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Soil texture and straw type modulate the chemical structure of residues during four-year decomposition by regulating bacterial and fungal communities

机译：通过调节细菌和真菌群落，土壤纹理和秸秆型调节四年分解过程中残留物的化学结构

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The changes of chemical structure and decomposer community during straw degradation have been inconsistent in previous reports, showing either convergence or divergence of chemical structures or microbial communities among different straw types. Hence the strength of their relationship remains unclear. Here, we directly measured the chemical structures and bacterial and fungal communities of wheat (Triticum aestivum L.) and maize (Zea mays L.) residues after four-year decomposition in three Calcaric Fluvisols that varied in soil textures. Separation of the chemical structures among the six soil-straw combinations (two straw types x three soil textures) were generally coupled with trends in the communities of bacterial and fungal decomposers, but the nature of their coupling differed. In the sand soil, soil texture was the central feature that shaped bacterial and fungal communities for both straw types, driving in turn the convergence of chemical structures of both decomposing straws. In contrast, in the sandy loam and silty clay soils, straw type was the primary regulator of the colonizing bacterial and fungal communities, which resulted in the divergence of chemical structures according to straw type.
机译：在稻草降解期间化学结构和分解群体的变化在先前的报告中仍然存在不一致，显示化学结构的收敛性或分歧或不同秸秆类型之间的微生物群落。因此，他们的关系的力量仍然不清楚。在这里，我们直接测量了小麦（Triticum aestivum L.）和玉米（Zea mays L.）残留的化学结构和细菌和真菌社区在土壤纹理中变化的三种钙化氟酚的四年分解后的残基。六种土秸秆组合中的化学结构（两种秸秆类型x三种土壤纹理）的分离通常与细菌和真菌分解的社区趋势相结合，但它们的耦合性质不同。在沙地土壤中，土壤质地是塑造秸秆类型的细菌和真菌社区的中央特征，驾驶反转两种分解吸管的化学结构的收敛。相比之下，在桑迪壤土和粉质粘土土壤中，秸秆型是殖民化细菌和真菌社区的主要调节因子，这导致了根据秸秆型化学结构的分歧。

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