Biochar Effectively Reduced N 2 O Emissions During Heap Composting and NH 3 Emissions During Aerobic Composting

Zhi Zhang, Haicheng Wu, Yue Zhao, Yupeng Wu, Runting Ming, Donghai Liu, Yan Qiao, Zhuoxi Xiao, Jian Ren, Yunfeng Chen and Cheng Hu ()
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Zhi Zhang: Key Laboratory of Fertilization from Agricultural Wastes, Ministry of Agriculture and Rural Affairs, Institute of Plant Protection and Soil Fertilizer, Hubei Academy of Agricultural Sciences, Wuhan 430064, China
Haicheng Wu: Key Laboratory of Fertilization from Agricultural Wastes, Ministry of Agriculture and Rural Affairs, Institute of Plant Protection and Soil Fertilizer, Hubei Academy of Agricultural Sciences, Wuhan 430064, China
Yue Zhao: Key Laboratory of Fertilization from Agricultural Wastes, Ministry of Agriculture and Rural Affairs, Institute of Plant Protection and Soil Fertilizer, Hubei Academy of Agricultural Sciences, Wuhan 430064, China
Yupeng Wu: College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
Runting Ming: College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
Donghai Liu: Key Laboratory of Fertilization from Agricultural Wastes, Ministry of Agriculture and Rural Affairs, Institute of Plant Protection and Soil Fertilizer, Hubei Academy of Agricultural Sciences, Wuhan 430064, China
Yan Qiao: Key Laboratory of Fertilization from Agricultural Wastes, Ministry of Agriculture and Rural Affairs, Institute of Plant Protection and Soil Fertilizer, Hubei Academy of Agricultural Sciences, Wuhan 430064, China
Zhuoxi Xiao: Key Laboratory of Fertilization from Agricultural Wastes, Ministry of Agriculture and Rural Affairs, Institute of Plant Protection and Soil Fertilizer, Hubei Academy of Agricultural Sciences, Wuhan 430064, China
Jian Ren: Key Laboratory of Fertilization from Agricultural Wastes, Ministry of Agriculture and Rural Affairs, Institute of Plant Protection and Soil Fertilizer, Hubei Academy of Agricultural Sciences, Wuhan 430064, China
Yunfeng Chen: Key Laboratory of Fertilization from Agricultural Wastes, Ministry of Agriculture and Rural Affairs, Institute of Plant Protection and Soil Fertilizer, Hubei Academy of Agricultural Sciences, Wuhan 430064, China
Cheng Hu: Key Laboratory of Fertilization from Agricultural Wastes, Ministry of Agriculture and Rural Affairs, Institute of Plant Protection and Soil Fertilizer, Hubei Academy of Agricultural Sciences, Wuhan 430064, China

Agriculture, 2025, vol. 15, issue 18, 1-13

Abstract: The composting process generates considerable amounts of greenhouse gases, presenting challenges for environmental protection. The utilization of biochar not only improves the composting efficiency but also reduces nitrogen (N) loss during composting. This study aimed to examine the impacts of adding biochar on the composting process, gaseous N emissions, and the bacterial community, as well as to clarify the difference between anoxic and aerobic composting. The experiment was conducted with cow dung and corn straw, with four treatments over 45 days: heap composting (C1), heap composting with 10% biochar (BC1), aerobic composting (C2), and aerobic composting with 10% biochar (BC2). The findings showed that adding biochar significantly reduced N 2 O emissions during the heap composting, achieving a cumulative emission reduction of 49.51% compared with composting without biochar. Meanwhile, aerobic composting led to a greater decrease in NH 3 emissions, with a cumulative emission reduction of 56.56%. Additionally, there was a marked increase in the abundance of Bacteroidota and Chryseoline . Biochar reduced nitrogen losses, especially N 2 O emissions during heap composting and NH 3 emissions during aerobic composting.

Keywords: agricultural waste; additive; waste treatment; greenhouse gas; microbial community (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2025
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