Impact of straw return and decomposition agent on Tibetan barley yield and soil microbial community in Xizang, China

文献类型： 外文期刊

第一作者： Sun, Quanping

作者： Sun, Quanping;Qin, Jiwei;Pen, Jun;Tian, Min;Dai, Xianglin;Wang, Shangwen

作者机构：

关键词： Straw returning; tibetan barley; soil microorganisms; crop yield; decomposition agent

期刊名称：ARCHIVES OF AGRONOMY AND SOIL SCIENCE （ 影响因子：1.8； 五年影响因子：2.5 ）

ISSN： 0365-0340

年卷期： 2025 年 71 卷 1 期

页码：

收录情况： SCI

摘要： Returning straw to the fields is an important practice for enhancing soil organic matter, however, its effects on Tibetan barley growth and soil microbial communities of use have not been comprehensively investigated. A 2-year field experiment with eight treatments varying in straw return and decomposition agent application was conducted, to assess their effects of straw return on Tibetan barley yield and soil microbial communities. The results indicated that straw can decomposes slowly at low temperatures if soil moisture is adequate. The addition of a decomposition agent significantly accelerated this process. Returning straw supplemented with a decomposition agent for two years resulted in a greater increase in Tibetan barley yield than a single year of return. Soil microbial analysis showed that straw return increased relative abundances of Acidobacteria and Chloroflexi, while Actinobacteria decreased and Proteobacteria declined with higher straw return. When the amount of straw returned was <= 50%, Chao1, Observed_species and Shannon were higher in treatments with the decomposition agent compared to those without. These findings indicate that the decomposition agent is effective for straw return in highland areas, and may support farmers in developing more improved straw management strategies for Tibetan barley cultivation in Xizang, China.

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