Correlation of residual feed intake, residual average daily gain, and residual intake and gain to carcass and steak characteristics of Hereford × Brahman steers

IF 1.4 Q3 AGRICULTURE, DAIRY & ANIMAL SCIENCE
T.J. Machado , K.L. Montemayor , F.M. Rouquette Jr , R. Reuter , J.C. Paschal , R.D. Randel
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引用次数: 0

Abstract

Objective

Our objective was to expand the understanding of Bos indicus feed efficiency by utilizing Hereford × Brahman steers to determine if residual feed intake (RFI), residual average daily gain (RADG), and residual intake and gain (RIG) influence carcass and steak characteristics.

Materials and Methods

Hereford × Brahman steers (n = 29; age ± SD = 261 ± 41 d) were transported to a facility with a GrowSafe System (GrowSafe Systems Ltd.) to determine RFI, RADG, and RIG, then to a feedyard (BW of 391 ± 39.0 kg), fed 89 d, and slaughtered (BW 731 ± 70 kg). Steers were categorized on their value compared with the mean (x) for RFI, RADG, and RIG into groups of efficient, less efficient, less inefficient, and inefficient.

Results and Discussion

Efficiency measurements RFI, RADG, and RIG were not correlated with carcass or steak characteristics. Carcasses from less inefficient RADG steers had the least internal fat. Carcasses from less efficient RIG steers had the most adjusted backfat, and less inefficient RIG steers had lower yield grades than the less efficient and inefficient RIG steers. Steaks from the less inefficient RFI steers were tougher than the efficient and less efficient RFI. All other carcass and steak characteristics were not different.

Implications and Applications

The results provide information about RFI, RADG, and RIG for Brahman- influenced herds and consideration of the small sample size should occur when applying the information to management decisions for beef herds.

残余采食量、残余平均日增重、残余采食量和增重与赫里福德牛×婆罗门牛胴体和牛排特征的相关性
目标我们的目标是利用赫里福德×婆罗门母牛来确定剩余采食量 (RFI)、剩余平均日增重 (RADG) 和剩余采食量与增重 (RIG) 是否会影响胴体和牛排的特性,从而扩大对雏牛饲料效率的了解。材料与方法将牧羊犬 × 婆罗门牛(n = 29;年龄 ± SD = 261 ± 41 d)运到装有 GrowSafe 系统(GrowSafe 系统有限公司)的设施,以测定 RFI、RADG 和 RIG,然后运到饲养场(体重为 391 ± 39.0 kg),饲养 89 d 后屠宰(体重为 731 ± 70 kg)。根据其与 RFI、RADG 和 RIG 平均值 (x) 的比较值,将阉牛分为高效组、低效组、低效组和低效组。效率较低的 RADG 牛的胴体内部脂肪最少。效率较低的 RIG 牛的胴体具有最多的调整后背脂,与效率较低和效率较低的 RIG 牛相比,效率较低的 RIG 牛的产量等级较低。效率较低的 RFI 牛的牛排比效率高和效率低的 RFI 牛更硬。该结果提供了有关受婆罗门影响的牛群的 RFI、RADG 和 RIG 的信息,在将这些信息应用于牛群管理决策时应考虑到样本量较小的问题。
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来源期刊
Applied Animal Science
Applied Animal Science AGRICULTURE, DAIRY & ANIMAL SCIENCE-
CiteScore
3.00
自引率
6.70%
发文量
68
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