Estimates of animal methane emissions
Estimates of animal methane emissions
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DOI：
10.1007/bf00394046
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发表时间：
1996-09-01
影响因子：
3
通讯作者：
Ward, GM
中科院分区：
文献类型：
--
作者：
Johnson, DE;Ward, GM
每年从家畜排放到大气中的肠道甲烷总量约为77 Tg。另外10至14 Tg可能从动物粪便处理系统中释放。全球约95%的动物肠道甲烷来自反刍动物，这是其庞大的种群，体型和食欲以及肠道中发生的广泛程度的厌氧微生物发酵的结果。准确的甲烷估计值对牛和布法罗的普查数字和估计的饮食消费量特别敏感。由于消费在很大程度上是未知的，必须预测，准确性往往受到所需信息的限制，即，动物按类别、重量和生产力的分布。对于世界牛、绵羊和山羊来说，作为肠道甲烷损失的饮食部分大多福尔斯在总能量摄入的5.5-6.5%的范围内。粪便甲烷排放量受厌氧塘处理量的影响很大。非反刍动物，即，猪，成为这些排放的主要贡献者。
The enteric methane emissions into the atmospheric annually from domestic animals total about 77 Tg. Another 10 to 14 Tg are likely released from animal manure disposal systems. About 95% of global animal enteric methane is from ruminants, a consequence of their large populations, body size and appetites combined with the extensive degree of anaerobic microbial fermentation occurring in their gut. Accurate methane estimates are particularly sensitive to cattle and buffalo census numbers and estimated diet consumption. Since consumption is largely unknown and must be predicted, accuracy is limited often by the information required, i.e., distribution of animals by class, weight and productivity. Fraction of the diet lost as enteric methane mostly falls into the range of 5.5-6.5% of gross energy intake for the world's cattle, sheep and goats. Manure methane emissions are heavily influenced by fraction of disposal by anaerobic lagoon. Non-ruminants, i.e., swine, become major contributors to these emissions.