Relationships between methane production and milk fatty acid profiles in dairy cattle
Relationships between methane production and milk fatty acid profiles in dairy cattle
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DOI：
10.1016/j.anifeedsci.2011.04.042
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发表时间：
2011-06-23
影响因子：
3.2
通讯作者：
Berends, H.
中科院分区：
文献类型：
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作者：
Dijkstra, J.;van Zijderveld, S. M.;Berends, H.
有必要制定量化和估计牛的甲烷产量的简单方法。我们的目的是评估甲烷的生产和牛奶脂肪酸（FA）的配置文件之间的关系，以便使用牛奶FA配置文件来预测甲烷的生产在奶牛。使用了来自3个奶牛实验的数据，共10个饮食处理和50个观察结果。饮食处理包括补充富马酸钙、二烯丙基二硫化物、辛酸、癸酸、月桂酸、肉豆蔻酸、挤压亚麻籽、亚麻籽油和丝兰粉。使用开路间接呼吸量热仪测量甲烷，并表示为g/kg干物质（DM）摄入量。通过气相色谱法分析牛奶FA，并将单个FA表示为总FA的分数。为了确定牛奶FA档案和CH 4生产之间的关系，单变量混合模型回归技术，包括随机实验效果。使用逐步程序开发多变量模型，并根据施瓦茨贝叶斯信息准则选择FA。干物质摄入量为17.7 +/- 1.83 kg/天，产奶量为27.0 +/- 4.64 kg/天，甲烷产量为21.5 +/- 1.69 g/kg DM。乳中C8：0、C10：0、C11：0、C14：0异源、C15：0异源、C16：0和C17：0异源正相关（P
There is a need to develop simple ways of quantifying and estimating CH4 production in cattle. Our aim was to evaluate the relationship between CH4 production and milk fatty acid (FA) profile in order to use milk FA profiles to predict CH4 production in dairy cattle. Data from 3 experiments with dairy cattle with a total of 10 dietary treatments and 50 observations were used. Dietary treatments included supplementation with calcium fumarate, diallyldisulfide, caprylic acid, capric acid, lauric acid, myristic acid, extruded linseed, linseed oil and yucca powder. Methane was measured using open circuit indirect respiration calorimetry chambers and expressed as g/kg dry matter (DM) intake. Milk FA were analyzed by gas chromatography and individual FA expressed as a fraction of total FA. To determine relationships between milk FA profile and CH4 production, univariate mixed model regression techniques were applied including a random experiment effect. A multivariate model was developed using a stepwise procedure with selection of FA based on the Schwarz Bayesian Information Criterion. Dry matter intake was 17.7 +/- 1.83 kg/day, milk production was 27.0 +/- 4.64 kg/day, and methane production was 21.5 +/- 1.69 g/kg DM. Milk C8:0, C10:0, C11:0, C14:0 iso, C15:0 iso, C16:0 and C17:0 anteiso were positively related (P