文献类型： 外文期刊
作者： Yi, Ming 1 ; Shen, Qi 1 ; Tang, Jiangwu 1 ; Sun, Hong 1 ;
作者机构： 1.Zhejiang Acad Agr Sci, Inst Environm Resource Soil & Fertilizer, 298 Desheng Middle Rd, Hangzhou 310021, Peoples R China
2.Zhejiang Acad Agr Sci, Inst Plant Protect & Microbiol, Hangzhou, Zhejiang, Peoples R China
关键词： Ectopic fermentation system; Pig manure; Straw; N2O; nosZ; CO2
期刊名称：JOURNAL OF ENVIRONMENTAL MANAGEMENT （ 影响因子：8.4； 五年影响因子：8.6 ）
ISSN： 0301-4797
年卷期： 2024 年 370 卷
页码：
收录情况： SCI
摘要： Straws are commonly used padding materials in the ectopic fermentation system, but their effects on greenhouse gas emissions are not well understood. This study compared the effects of rape, rice and corn straws on the fermentation performance of the ectopic fermentation system. Compared with corn straw, the treatment groups with rape straw and rice straw significantly increased the alpha diversity of the fermentation system, and simultaneously mitigated the cumulative emissions of CO2 and N2O by up to 32.4% and 93.9%, respectively. The CO2 and N2O peak emission in the treatment group with corn straw reached 1.4 x 106 6 and 36.2 mg/m(2)/d, respectively. CH4 4 peak emission was one order of magnitude lower than that of N2O in the ectopic fermentation system. Redundancy analysis showed that Pseudoxanthomonas sp000510725 was the key specie that positively affect the fermentation temperature, CO2 and N2O emissions in the fermentation system. Nitrogen metabolism genes, such as nosZ, nirK, and nirS were more abundant in the surface layer of the fermentation system, indicating more active nitrogen metabolism in this region, and the core zone could be the primary source of N2O emissions. Those findings indicated that rape and rice straw can be potential padding materials for mitigating greenhouse gas emissions in large-scale ectopic fermentation system.
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