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首页> 美国卫生研究院文献>Saudi Journal of Biological Sciences >The impact of cover crop shoot decomposition on soil microorganisms in an apple orchard in northeast China
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The impact of cover crop shoot decomposition on soil microorganisms in an apple orchard in northeast China

机译：东北苹果园覆盖作物芽分解对土壤微生物的影响

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摘要

Mowing can facilitate the incorporation of cover crop shoots into soil and improve the properties of soils in apple orchards. This article evaluated how apple orchard soil responds to the decomposition of the shoot residues of three cover crops[native mixed herbs (NMS), red clover (RCS), and ryegrass (RES)] in terms of microbial metabolism and biomass, and discussed the relationships between microbial responses and shoot chemistry. The chemical composition of shoots was analysed and a buried bag experiment was carried out to simulate shoot decomposition in an apple orchard. The results revealed significant differences in the chemical compositions and shoot C:N ratios (NMS: 10.9, RCS: 19.1, and RES: 12.9) of the three cover crops. The decomposition of the cover crop shoots promoted microbial metabolism and boosted soil bacterial reproduction (increase in the biomass indicator muramic acid: 19.44, 124.15, and 14.83 mg kg , respectively. But there are different types of effects on soil fungal reproduction (change in the biomass indicator glucosamine: 712.51, 887.45, and 103.97 mg kg ), and they are obviously negative, significantly positive, and non-significant respectively. Thus, the native mixed herbs and red clover are preferable swards for better shoot enhancement in apple orchard.
机译：修剪可以促进将农作物芽苗并入土壤并改善苹果园土壤的特性。本文从微生物代谢和生物量的角度，评估了苹果园土壤对三种覆盖作物[原生混合草药（NMS），红三叶草（RCS）和黑麦草（RES）]的枝条残留物分解的响应，并讨论了微生物反应和枝条化学之间的关系。分析了芽的化学成分，并进行了埋袋实验以模拟苹果园中芽的分解。结果表明，三种覆盖作物的化学成分和茎秆碳氮比（NMS：10.9，RCS：19.1和RES：12.9）存在显着差异。覆盖作物芽的分解促进了微生物的新陈代谢，促进了土壤细菌的繁殖（生物量指标山mic酸的增加分别为19.44、124.15和14.83 mg kg。但对土壤真菌的繁殖有不同类型的影响（变化）。生物量指标葡糖胺：712.51、887.45和103.97μg/ kg），它们分别明显为阴性，显着阳性和无显着性，因此，最好采用天然混合草药和红三叶草来增强苹果园的枝条生长。

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