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应用反演式气体扩散技术测定奶牛场甲烷的排放特征

Keywords: 奶牛场,甲烷,反演式气体扩散模型,开路式激光仪,日排放特征

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Abstract:

为了准确揭示奶牛场的甲烷排放特征,在我国首次采用国际上最新的反演式气体扩散技术与开路式激光仪相结合的研究方法,分别于2009年冬季和2010年春季测定了保定市某奶牛养殖基地甲烷的排放特征,测定期间养殖基地的动物总量平均为1200头。结果表明,奶牛养殖场尺度的甲烷排放在冬季和春季均呈现出规律性的日排放特征,即养殖场甲烷日排放高峰出现在05:00、11:30和16:30,排放高峰的出现时间与上料时间基本吻合;冬季和春季试验期间该养殖场的反刍和粪尿甲烷总排放量分别为0.31t·d-1和0.36t·d-1,养殖基地内整个牛群平均每头牛的反刍和粪尿甲烷日排放总量分别为0.26kg·d-1和0.30kg·d-1,春季的甲烷日排放量比冬季约高16.7%,初步揭示了奶牛场尺度甲烷排放的季节性差异。

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