RELATIONSHIPS BETWEEN MILK-YIELD AND FERTILITY IN DAIRY-CATTLE

被引：67

作者：

OLDS, D

COOPER, T

THRIFT, FA

机构：

[1] Department of Animal Sciences, University of Kentucky, Lexington

来源：

JOURNAL OF DAIRY SCIENCE | 1979年 / 62卷 / 07期

关键词：

D O I：

10.3168/jds.S0022-0302(79)83387-1

中图分类号：

S8 [畜牧、动物医学、狩猎、蚕、蜂];

学科分类号：

0905 ;

摘要：

In three studies of 51,618 Holstein, 6,630 Jersey, and 1,524 Guernsey records, correlation was .07 between 120-day milk yield and number of services required for probable conception, independent of days postpartum. The partial regression coefficient for Holsteins was .014 ± .001 more services for each additional 100 kg of 120-day milk. For Jerseys and Guernseys, .028 ± .008 more services were required for each additional 100 kg of 120-day milk. © 1979, American Dairy Science Association. All rights reserved.

引用

页码：1140 / 1144

页数：5

共 26 条

[1] RELATIONSHIP BETWEEN LEVEL OF MILK PRODUCTION AND BREEDING EFFICIENCY IN DAIRY CATTLE [J].