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| Addition of loess or paleosol reduces greenhouse gas emissions from pig manure |
| Received:November 22, 2018 |
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| KeyWord:livestock manure;greenhouse gases;loess;paleosol;global warming potential |
| Author Name | Affiliation | E-mail | | LEI Ming | College of Natural Resources and Environment, Northwest A & F University, Yangling 712100, China
Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, Yangling 712100, China | | | CHENG Yu-zhen | College of Natural Resources and Environment, Northwest A & F University, Yangling 712100, China
Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, Yangling 712100, China | | | CHEN Zhu-jun | College of Natural Resources and Environment, Northwest A & F University, Yangling 712100, China
Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, Yangling 712100, China | | | ZHOU Jian-bin | College of Natural Resources and Environment, Northwest A & F University, Yangling 712100, China
Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, Yangling 712100, China | jbzhou@nwsuaf.edu.cn |
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| Abstract: |
| Manure storage is an important process that influences greenhouse gas emissions when considering manure management practices. In order to better understand the possible mechanisms of adding loess to livestock housing and its effects on greenhouse gas emissions, an incubation experiment was carried out to study the effects of adding loess and paleosol to pig manure. The results showed that the cumulative release of CO2 and CH4 decreased by 42.4%~64.3% and by more than 99.8%, respectively. Compared to the control(pig manure without the addition of loess or paleosol), the loess and paleosol treatments show a 1.8 to 18.0-fold reduction in the cumulative N2O emissions because of their soil retention abilities and dilution effects. The global warming potential of loess or paleosol treatments was approximately 38.1%~67.0%, compared to that of the control, indicating an effective reduction in greenhouse gas emissions. When compared to the loess treatment, the paleosol treatment had a greater effect on emission reduction owing to the higher content of physical clay and free iron oxide present in paleosol. We conclude that the selection of a suitable additive has an important impact on greenhouse gas emissions during manure storage. |
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