Short communication: Verifying Holstein heifer heart girth to body weight prediction equations

被引：21

作者：

Heinrichs, A. J. ^{[1
]}

Heinrichs, B. S. ^{[1
]}

Jones, C. M. ^{[1
]}

Erickson, P. S. ^{[2
]}

Kalscheure, K. F. ^{[3
,7
]}

Nennich, T. D. ^{[4
,8
]}

Heins, B. J. ^{[5
]}

Cardosoll, F. C. ^{[6
]}

机构：

[1] Penn State Univ, Dept Anim Sci, University Pk, PA 16802 USA

[2] Univ New Hampshire, Dept Biol Sci, Durham, NH 03824 USA

[3] South Dakota State Univ, Dairy Sci Dept, Brookings, SD 57007 USA

[4] Purdue Univ, Dept Anim Sci, W Lafayette, IN 47907 USA

[5] Univ Minnesota, West Cent Res & Outreach Ctr, Morris, MN 56267 USA

[6] Univ Illinois, Dept Anim Sci, 328 Mumford Hall, Urbana, IL 61801 USA

[7] USDA ARS, US Dairy Forage Res Ctr, Madison, WI 53706 USA

[8] Famo Feeds Inc, Freeport, MN 56331 USA

来源：

JOURNAL OF DAIRY SCIENCE | 2017年 / 100卷 / 10期

关键词：

dairy heifer; body weight; heart girth; CATTLE;

D O I：

10.3168/jds.2016-12496

中图分类号：

S8 [畜牧、动物医学、狩猎、蚕、蜂];

学科分类号：

0905 ;

摘要：

The estimation of Holstein heifer body weight (BW) from heart girth measurements is needed, as many farms do not have animal scales to make the management decisions that require BW. The correlation between heart girth and BW is known to vary with differing animal conformation. The previous equation to correlate the 2 measures for Holstein dairy heifers was done 25 yr ago. Data were derived from 6 US experiment stations that are part of Regional Research Project NC-2042: Management Systems to Improve the Economic and Environmental Sustainability of Dairy Enterprises. After deriving a new equation from a data set of observations and using a second validation data set, it was determined that the equation developed in 1992 was still valid and further equation development was not needed at this time.

引用

页码：8451 / 8454

页数：4

共 8 条

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