Institute of Agro-Environment and Ecology, Hunan Academy of Agricultural Sciences, Changsha, Hunan, 410125, China; College of Environment and Ecology, Hunan Agricultural University, Changsha 410128, Hunan, China.
College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, 410128, Hunan, China.
Bioresour Technol. 2024 Sep;407:131114. doi: 10.1016/j.biortech.2024.131114. Epub 2024 Jul 14.
This research examined the impact of exogenous thermophilic bacteria and ripening agents on greenhouse gas (GHG) emission, enzyme activity, and microbial community during composting. The use of ripening agents alone resulted in a 30.9 % reduction in CO emissions, while the use of ripening agents and thermophilic bacteria resulted in a 50.8 % reduction in NO emissions. Pearson's analysis showed that organic matter and nitrate nitrogen were the key parameters affecting GHG emissions. There was an inverse correlation between CO and CH releases and methane monooxygenase α subunit and NO reductase activity (P<0.05). Additionally, NO emissions were positively related to β-1, 4-N-acetylglucosaminidase, and ammonia monooxygenase activity (P<0.05). Deinococcota, Chloroflexi, and Bacteroidota are closely related to CO and NO emissions. Overall, adding thermophilic bacteria represents an effective strategy to mitigate GHG emissions during composting.
本研究考察了外源嗜热菌和腐熟剂对堆肥过程中温室气体（GHG）排放、酶活性和微生物群落的影响。单独使用腐熟剂可使 CO 排放减少 30.9%，而同时使用腐熟剂和嗜热菌可使 NO 排放减少 50.8%。Pearson 分析表明，有机质和硝态氮是影响 GHG 排放的关键参数。CO 和 CH 释放与甲烷单加氧酶 α 亚基和 NO 还原酶活性呈负相关（P<0.05）。此外，NO 排放与β-1,4-N-乙酰氨基葡萄糖苷酶和氨单加氧酶活性呈正相关（P<0.05）。Deinococcota、Chloroflexi 和 Bacteroidota 与 CO 和 NO 排放密切相关。总的来说，添加嗜热菌是一种有效策略，可以减少堆肥过程中的 GHG 排放。
