Effects of Revalor-XH, Revalor-200, and combination Revalor-IH/Revalor-200 on yearling beef heifer growth performance and carcass characteristics for 138 days on feed

被引：1

作者：

Carlson, Z. E. ^{[1
]}

Coulson, C. A. ^{[1
]}

Jordon, D. J. ^{[2
]}

Cooper, R. J. ^{[2
]}

Scott, T. L. ^{[2
]}

Bundy, S. J. ^{[2
]}

Nuttelman, B. L. ^{[3
]}

Crawford, G., I ^{[3
]}

Nichols, W. T. ^{[3
]}

Streeter, M. N. ^{[3
]}

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

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

Erickson, G. E. ^{[1
]}

机构：

[1] Univ Nebraska, Dept Anim Sci, Lincoln, NE 68583 USA

[2] Cattlemens Nutr Serv, Lincoln, NE 68506 USA

[3] Merck Anim Hlth, Desoto, KS 66018 USA

来源：

APPLIED ANIMAL SCIENCE | 2021年 / 37卷 / 04期

关键词：

coating; finishing; heifer; steroidal implant; yearling; IMPLANTS; TRAITS; STEERS;

D O I：

10.15232/aas.2020-02116

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 finishing heifer implant programs including a single noncoated implant (Revalor-200; REV-200); an initial noncoated implant (Revalor-IH) followed by another noncoated implant (Re valor-200; REV-IH/200) 80 d before slaughter; or a partially coated, delayed-release implant (Revalor-XH; REV-XH) on growth performance and carcass characteristics when heifers were fed for 138 d. Materials and Methods: A commercial feedlot trial used 1,728 crossbred heifers (initial BW = 412 kg; SD = 28.2 kg) to examine the 3 implant strategies. Only heifers implanted with REV-IH/200 were removed from their pen at re-implantation. Results and Discussion: Heifers implanted with REV-IH/200 had greater (P <= 0.05) carcass-adjusted final BW, calculated as hot carcass weight/DP, and G:F compared with heifers implanted with REV-200 or REV-XH. Treatment did not affect (P >= 0.24) final BW or ADG on a live basis. Heifers implanted with REV-IH/200 had greater (P <= 0.05) hot carcass weight and LM area compared with heifers implanted with REV-200 or REV-XH. Marbling score and 12th-rib fat thickness were not different (P >= 0.12) among implant treatments. Calculated YG were decreased (P = 0.05) for heifers implanted with REV-IH/200 compared with heifers implanted with REV-200, with a significant (P < 0.01) shift to a lower calculated YG distribution for heifers implanted with REV-IH/200 compared with REV-200 or REV-XH. Implications and Applications: Greater concentrations of trenbolone acetate and estradiol-170 improved carcass-adjusted G:F and hot carcass weight but did not significantly decrease marbling despite heifers having a lower calculated YG.

引用

页码：470 / 478

页数：9

共 22 条

[21] Effects of a single initial and delayed release implant on arrival compared with a non-coated initial implant and a non-coated terminal implant in heifers fed across various days on feed [J].