Impacts of size reduction and alkaline-soaking pretreatments on microbial community and organic matter decomposition during wheat straw composting
文献类型： 外文期刊
作者： Tan, Hao 1 ; Yu, Yang 2 ; Zhu, Yongqun 3 ; Liu, Tianhai 2 ; Miao, Renyun 2 ; Hu, Rongping 2 ; Peng, Weihong 2 ; Chen, Jian 1 ;
作者机构： 1.Jiangnan Univ, Sch Bioengn, Wuxi, Peoples R China
2.Sichuan Acad Agr Sci, Sichuan Inst Edible Fungi, Res Ctr Microbial Ecol Engn, Chengdu, Peoples R China
3.Sichuan Acad Agr Sci, Inst Agr Resources & Environm, Chengdu, Peoples R China
4.Chinese Acad Agr Sci, Inst Urban Agr, Chengdu, Peoples R China
关键词： Size reduction; Alkaline soaking; Wheat-straw composting; Microbial community shift; Enzymatic activity
期刊名称：BIORESOURCE TECHNOLOGY （ 影响因子：11.889； 五年影响因子：11.139 ）
ISSN： 0960-8524
年卷期： 2022 年 360 卷
页码：
收录情况： SCI
摘要： This study assessed the impacts of size reduction and alkaline-soaking pretreatments on microbial community shifts and organic matter decomposition in wheat straw composting. Bacterial communities were altered by alkaline soaking rather than size reduction, while fungal communities were altered by both pretreatments. Alkaline-soaking pretreatment promoted lignocellulosic saccharification and humification. A combination of both pretreatments increased the proportion of the fungal genus Coprinopsis (39%) at the early stage and pro-moted the proliferation of Ornithincoccus (15%) at the late stage. This facilitated the mineralization of ammonium N from amino acids; decreased the total lipids, free fatty acids, and nitrate N contents; and greatly improved the germination index of the final composting product to a high level of 149% as tested with radish seeds. The findings demonstrate that the combined application of size reduction and alkaline-soaking pretreatments is an effective strategy for improving the product quality of wheat straw compost.
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