Relationships of metabolic profiles to milk production and feeding in dairy cows
Relationships of metabolic profiles to milk production and feeding in dairy cows
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DOI：
10.1292/jvms.65.671
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发表时间：
2003-06-01
影响因子：
1.2
通讯作者：
Kida, K
中科院分区：
文献类型：
--
作者：
Kida, K
本研究的目的是评价代谢谱试验(MPT)在奶牛饲养评价中的实用性。采用逐步回归分析的方法，对343个商品奶牛群中4679头奶牛的最低产奶时间与饲喂和产奶量之间的关系进行了分析。在10种血液代谢物的参考值和身体状况评分的偏离值中，通过正向设置选择确定了显著的解释变量，以预测每个或所有哺乳期和干燥期的因变量，即产奶量和喂食量与营养需求的比率。全哺乳阶段的产奶量模型拟合度最大(校正R2=0.214，p
The aim of this study was to assess the practicality of the metabolic profile test (MPT) for feeding evaluation in dairy cattle. Stepwise regression analysis was used to evaluate the relationships of MPT to feeding and milk production of 4,679 cows in 343 commercial dairy herds. Significant explanatory variables were determined by forward set-up selection, among the deviated values from the reference values of 10 blood metabolites and body condition score, to predict dependent variables, i.e., milk production and the rate of feeding to nutrient requirements, in each or all lactation stages and the dry period. The milk production model of the all-lactation stage showed the greatest goodness-of-fit (adjusted R-2=0.214, p