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| Greenhouse Gas Emissions in Different Pig Raising Modes |
| Received:July 24, 2014 |
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| KeyWord:bio-bed pig raising;traditional barn;greenhouse gases;emission |
| Author Name | Affiliation | E-mail | | GUO Hai-ning | College of Environmental Science and Engineering, Yangzhou University, Yangzhou 225127, China | | | LI Jian-hui | College of Environmental Science and Engineering, Yangzhou University, Yangzhou 225127, China | | | MA Han | College of Environmental Science and Engineering, Yangzhou University, Yangzhou 225127, China | | | XUE Hong-bo | College of Environmental Science and Engineering, Yangzhou University, Yangzhou 225127, China | | | YIN Wei-qin | College of Environmental Science and Engineering, Yangzhou University, Yangzhou 225127, China | | | WANG Xiao-zhi | College of Environmental Science and Engineering, Yangzhou University, Yangzhou 225127, China
Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing 210095, China | xzwang@yzu.edu.cn | | FENG Ke | College of Environmental Science and Engineering, Yangzhou University, Yangzhou 225127, China
Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing 210095, China | | | GU Hong-ru | Institute of Animal Science, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China | |
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| Abstract: |
| Livestock production is an important contributor to greenhouse gas emissions. To evaluate greenhouse gas emissions of different pig raising models, an experiment was carried out in a bio-bed and a traditional cement floor barn in Liuhe, Nanjing. Concentrations of CH4, CO2 and N2O in the air of the barns were determined. The fluxes of greenhouse gas emissions from different barns were estimated based on carbon balance principle. The average CH4, CO2 and N2O concentrations in the bio-bed were 61.2%, 78.6% and 125.0% of those in the traditional barn, respectively. Compared with the traditional barn, the average flux of CH4 was 36% lower, but that of N2O and CO2 was 10 times and 1.4 times higher in the bio bed. Taking into consideration the traditional farm manure composting and swine lagoon in the process of follow-up management, the total greenhouse gas emissions as CO2 equivalent per day per pig from the bio-bed were 26.3% more than that in the traditional farm during the experiment. Carbon dioxide, followed by N2O, was the main contributor to the total greenhouse gas emissions in the bio-bed. |
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