The Impacts of the C/N Ratio on Hydrogen Sulfide Emission and Microbial Community Characteristics during Chicken Manure Composting with Wheat Straw

Shangying Cai, Yi Ma, Zhenkang Bao, Ziying Yang, Xiangyu Niu, Qingzhen Meng, Dongsheng Qin, Yan Wang, Junfeng Wan and Xiaoying Guo ()
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Shangying Cai: College of Ecology and Environment, Zhengzhou University, Zhengzhou 450001, China
Yi Ma: College of Ecology and Environment, Zhengzhou University, Zhengzhou 450001, China
Zhenkang Bao: College of Ecology and Environment, Zhengzhou University, Zhengzhou 450001, China
Ziying Yang: College of Ecology and Environment, Zhengzhou University, Zhengzhou 450001, China
Xiangyu Niu: College of Ecology and Environment, Zhengzhou University, Zhengzhou 450001, China
Qingzhen Meng: College of Ecology and Environment, Zhengzhou University, Zhengzhou 450001, China
Dongsheng Qin: Henan Sangao Agricultural and Animal Husbandry Co., Ltd., Xinyang 465200, China
Yan Wang: College of Ecology and Environment, Zhengzhou University, Zhengzhou 450001, China
Junfeng Wan: College of Ecology and Environment, Zhengzhou University, Zhengzhou 450001, China
Xiaoying Guo: College of Ecology and Environment, Zhengzhou University, Zhengzhou 450001, China

Agriculture, 2024, vol. 14, issue 6, 1-18

Abstract: Wheat straw (WS) has long been subjected to rough treatment by traditional incineration, which not only results in the waste of biomass resources but also poses a risk of atmospheric pollution and is not conducive to the sustainable utilization of natural resources. With great humification potential, WS can be utilized as a valuable composting material. The study optimized the C/N ratio by mixing WS and chicken manure (CM) as composting raw materials, and found that this method could significantly improve the compost quality. In comparison to the conventional poplar woodchip (PW) conditioning, the incorporation of WS resulted in an elevated composting temperature, an extended high-temperature period, a more expeditious lignocellulose degradation, a notable enhancement in the organic matter content, a suppression of hydrogen sulfide production under low C/N ratio, and a promotion of elemental sulfur conversion, collectively contributing to an enhanced overall quality and environmental friendliness of the compost. Correlation analysis of microbial communities and environmental factors demonstrated that the mixed compost facilitated the growth of actinomycetes and sulfur-transforming bacteria. Additionally, structural equation model indicated that parameters such as temperature and pH value played a key role in the composting process.

Keywords: straw; chicken compost; resource utilization; composting effect; sulfur loss (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: 2024
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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