A major pathway for carbon and nitrogen losses-Gas emissions during storage of solid pig manure in China

【摘要】 This study investigated the carbon（C） and nitrogen（N） gas emissions（N₂O,NH₃,CO₂ and CH₄） from solid pig manure management in China.Gas emissions were quantified from static piles over 60 days during summer in China’s Yangtze River Basin,using Drager-Tube and static chamber-gas chromatography techniques.High emissions of NH₃ and N₂ O were observed at the early stage of storage,but high emission of CH₄ occured later during storage.Overall,62% of the total C in the original pile was lost; CO₂ and CH₄ emissions accounted for 57 and 0.2% of C lost respectively.Over the same time,41% of the total N in the original pile was lost; NH₃ and N₂ O emissions accounted for 15 and 0.3% of N lost respectively.The volatilization of NH₃ during storage in summer was 4.56 g NH₃ per kg dry weight.The total greenhouse gas（GHG） emissions during storage accounted for 67.93 g CO₂ equivalent per kg dry weight; N₂ O and CH₄ contributed to 46 and 55% of total GHG emissions respectively.Given China’s major role in pig production,further attention should given to pig manure management to mitigate its contribution to atmospheric pollution.更多还原

【Abstract】 This study investigated the carbon（C） and nitrogen（N） gas emissions（N₂O,NH₃,CO₂ and CH₄） from solid pig manure management in China.Gas emissions were quantified from static piles over 60 days during summer in China’s Yangtze River Basin,using Drager-Tube and static chamber-gas chromatography techniques.High emissions of NH₃ and N₂ O were observed at the early stage of storage,but high emission of CH₄ occured later during storage.Overall,62% of the total C in the original pile was lost; CO₂ and CH₄ emissions accounted for 57 and 0.2% of C lost respectively.Over the same time,41% of the total N in the original pile was lost; NH₃ and N₂ O emissions accounted for 15 and 0.3% of N lost respectively.The volatilization of NH₃ during storage in summer was 4.56 g NH₃ per kg dry weight.The total greenhouse gas（GHG） emissions during storage accounted for 67.93 g CO₂ equivalent per kg dry weight; N₂ O and CH₄ contributed to 46 and 55% of total GHG emissions respectively.Given China’s major role in pig production,further attention should given to pig manure management to mitigate its contribution to atmospheric pollution.更多还原