Effects of days on feed on performance and carcass characteristics of crossbred beef x dairy heifers

被引：0

作者：

Husz, T. C. ^{[1
]}

Word, A. B. ^{[2
]}

Karr, K. J. ^{[2
]}

Holland, B. P. ^{[2
]}

Lawrence, T. E. ^{[1
]}

Perkins, T. L. ^{[1
]}

Hutcheson, J. P. ^{[3
]}

Walter, L. J. ^{[3
]}

机构：

[1] West Texas A&M Univ, Canyon, TX 79015 USA

[2] Cactus Res, Amarillo, TX 79101 USA

[3] Merck Anim Hlth, Rahway, NJ 07065 USA

来源：

APPLIED ANIMAL SCIENCE | 2024年 / 40卷 / 04期

关键词：

beef dairy crossbred; carcass; growth; heifer; serial slaughter; ZILPATEROL HYDROCHLORIDE; BODY-COMPOSITION; LIVER-ABSCESSES; CATTLE; GROWTH; STEERS; BREED; REQUIREMENTS; ASSOCIATION; EFFICIENCY;

D O I：

10.15232/aas.2023-02500

中图分类号：

S8 [畜牧、动物医学、狩猎、蚕、蜂];

学科分类号：

0905 ;

摘要：

Objective: The objective was to evaluate the effect of days on feed (DOF) on performance and carcass characteristics of crossbred beef x dairy heifers. Materials and Methods: Beef x dairy heifers (n = 3,765; initial BW = 508 +/- 8.55 kg) were blocked by arrival date and lot (n = 6 blocks at feedyard 1 and n = 7 blocks at feedyard 2) and randomly assigned to 1 of 4 DOF treatments of 323, 344, 362, or 385 when administered a Revalor-200 (200 mg of trenbolone acetate [TBA] and 20 mg Results and Discussion: Dry matter intake was not from 593 to 655 kg. As DOF increased, ADG and gain: calculated YG, and marbling score increased linearly as DOF increased. Across the 63-d serial slaughter period, hot carcass weight increased 0.67 kg/d. Dressing percentage and backfat thickness increased in a quadratic manner across DOF. Further, QG and YG distribution increased linearly as DOF increased. Liver abscess prevalence or severity did not increase with DOF. Implications and Applications: Results of this study dairy crossbred heifers.

引用

页码：549 / 559

页数：11

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