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| Effects of wheat straw addition on nitrogen emission reduction and bacterial community during chicken manure composting |
| Received:June 26, 2023 |
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| KeyWord:nitrogen emission reduction;wheat straw;chicken manure;aerobic compost;bacterial diversity |
| Author Name | Affiliation | E-mail | | CAO Lina | College of Ecology and Environment, Zhengzhou University, Zhengzhou 450001, China
Henan International Joint Laboratory of Environment and Resources, Zhengzhou University, Zhengzhou 450001, China | | | WANG Yan | College of Ecology and Environment, Zhengzhou University, Zhengzhou 450001, China
Henan International Joint Laboratory of Environment and Resources, Zhengzhou University, Zhengzhou 450001, China | | | WANG Yue | College of Ecology and Environment, Zhengzhou University, Zhengzhou 450001, China
Henan International Joint Laboratory of Environment and Resources, Zhengzhou University, Zhengzhou 450001, China | | | LI Pei | College of Ecology and Environment, Zhengzhou University, Zhengzhou 450001, China
Henan International Joint Laboratory of Environment and Resources, Zhengzhou University, Zhengzhou 450001, China | | | ZHENG Ke | College of Ecology and Environment, Zhengzhou University, Zhengzhou 450001, China
Henan International Joint Laboratory of Environment and Resources, Zhengzhou University, Zhengzhou 450001, China | | | LIU Jiaqi | College of Ecology and Environment, Zhengzhou University, Zhengzhou 450001, China
Henan International Joint Laboratory of Environment and Resources, Zhengzhou University, Zhengzhou 450001, China | | | LI Hongli | College of Ecology and Environment, Zhengzhou University, Zhengzhou 450001, China
Henan International Joint Laboratory of Environment and Resources, Zhengzhou University, Zhengzhou 450001, China | lihonglihn@zzu.edu.cn |
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| Abstract: |
| Aerobic composting is the main technical mean used in the resource use of chicken manure. However, nitrogen loss in the composting process is more severe, which not only reduces the fertilizer efficiency but also causes severe pollution. In this study, the C/N of chicken manure compost was adjusted to 15 using wheat straw. The physicochemical properties, nitrogen conversion, and microbial community changes of the composting process were analyzed, and mechanisms for reducing compost nitrogen loss were explored. The results showed that the duration of high compost temperatures after adding wheat straw lasted 23 days, which was 9 days longer than the control. The pH was significantly reduced, and the nitrogen loss was reduced by 39.67%. The nitrate nitrogen content reached 281.99 mg·kg-1, which was increased by 68.75% compared to the control. The microbial community stabilized, and the relative abundance of bacteria with nitration function, such as o__Staphylococcales, o__Brachybacterium, f__Staphylococcaceae, g__Staphylococcus and g__Salinicoccus, increased by 88.45%, 96.39%, 88.45%, 96.08%, and 79.20% compared with the control group, respectively, which were beneficial to the retention and transformation of nitrogen in the pile. The experimental results showed that the addition of wheat straw affected the bacterial community structure of chicken manure compost, while increasing bacteria abundance with nitrification function, and reducing nitrogen loss in the pile. |
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