VARIABLES ASSOCIATED WITH PERIPARTUM TRAITS IN DAIRY-COWS .1. EFFECT OF DIETARY FORAGES AND DISORDERS ON VOLUNTARY INTAKE OF FEED, BODY-WEIGHT AND MILK-YIELD

被引：46

作者：

ZAMET, CN ^{[1
]}

COLENBRANDER, VF ^{[1
]}

CALLAHAN, CJ ^{[1
]}

CHEW, BP ^{[1
]}

ERB, RE ^{[1
]}

MOELLER, NJ ^{[1
]}

机构：

[1] PURDUE UNIV,LARGE ANIM CLIN,W LAFAYETTE,IN 47907

来源：

THERIOGENOLOGY | 1979年 / 11卷 / 03期

关键词：

D O I：

10.1016/0093-691X(79)90031-1

中图分类号：

Q [生物科学];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Daily voluntary intakes of feed by each of 89 Holstein cows were compared between day 220 of gestation and day 30 postpartum over a 21-month period. Diets designed to meet NRC requirements and which contained either chopped hay (29 cows), hay crop silage (HCS; 30 cows) or corn silage (CS; 30 cows) were compared prepartum (27 to 0 days), peripartum (1 day before to 3 days after calving) and postpartum (days 4 to 30 postpartum). Mixed rations, fed during lactation, were 60% forage and 40% concentrate dry matter (DM). Cow management was similar to commercial operations. The experimental hypothesis was that pre-disposition for partum and postpartum disorders (abnormal) could be related either to voluntary intake of different diets or to physical traits. Intakes (DM or estimated net energy) across diets decreased 30% between days 7 and 1 prepartum and averaged 18% and 20% lower peripartum and postpartum, respectively, in abnormal cows than in control cows. Seasonal effects on intakes were significant. In general, changes in body weight and condition and differences in udder edema and milk yield reflected intakes. The results support the original hypothesis. © 1979.

引用

页码：229 / 244

页数：16

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