An inhibitor persistently decreased enteric methane emission from dairy cows with no negative effect on milk production
An inhibitor persistently decreased enteric methane emission from dairy cows with no negative effect on milk production
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DOI：
10.1073/pnas.1504124112
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发表时间：
2015-08-25
影响因子：
11.1
通讯作者：
Duval, Stephane
中科院分区：
文献类型：
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作者：
Hristov, Alexander N.;Oh, Joonpyo;Duval, Stephane
在美国，四分之一的人为甲烷排放来自肠道发酵，主要来自反刍家畜。本试验旨在研究甲烷抑制剂3-硝基氧丙醇（3NOP）对泌乳荷斯坦奶牛肠道甲烷排放的影响。试验选用48头奶牛，采用随机区组设计，共变量期为2周，数据收集期为12周。采食量、产奶量和纤维消化率不受抑制剂的影响。添加3NOP可提高乳蛋白和乳糖产量。瘤胃甲烷排放量线性降低3NOP，平均比对照组降低约30%。3nop处理的奶牛每单位饲料干物质采食量或每单位能量校正奶的甲烷排放量也减少了约30%。在12周的试验期间，3nop处理奶牛的平均增重比对照奶牛高80%。结果表明，在饲料干物质浓度为40 ~ 80 mg/kg的条件下，甲烷抑制剂3NOP在不影响采食量、产奶量和成分的情况下，可使高产奶牛的甲烷排放量减少30%，提高增重。抑制效果持续12周以上，从而为畜牧业提供了一种有效的甲烷减排做法。
A quarter of all anthropogenic methane emissions in the United States are from enteric fermentation, primarily from ruminant livestock. This study was undertaken to test the effect of a methane inhibitor, 3-nitrooxypropanol (3NOP), on enteric methane emission in lactating Holstein cows. An experiment was conducted using 48 cows in a randomized block design with a 2-wk covariate period and a 12-wk data collection period. Feed intake, milk production, and fiber digestibility were not affected by the inhibitor. Milk protein and lactose yields were increased by 3NOP. Rumen methane emission was linearly decreased by 3NOP, averaging about 30% lower than the control. Methane emission per unit of feed dry matter intake or per unit of energy-corrected milk were also about 30% less for the 3NOP-treated cows. On average, the body weight gain of 3NOP-treated cows was 80% greater than control cows during the 12-wk experiment. The experiment demonstrated that the methane inhibitor 3NOP, applied at 40 to 80 mg/kg feed dry matter, decreased methane emissions from high-producing dairy cows by 30% and increased body weight gain without negatively affecting feed intake or milk production and composition. The inhibitory effect persisted over 12 wk of treatment, thus offering an effective methane mitigation practice for the livestock industries.