Feed Intake, Weight Gain and Carcass Yield Characteristics of Intact Hararghe Highland Male Goats Fed on Different Hay to Concentrate Ratios

East African Journal of Sciences Pub Date : 2007-01-01 DOI:10.4314/EAJSCI.V1I1.40340

Asnakew Awuk, B. Tamir

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引用次数: 6

Abstract

Feed intake, live weight gain and carcass yield characteristics were studied using twenty-five yearling intact Hararghe highland male goats (17.6 ± 0.11 kg body weight) fed diets containing different hay to concentrate ratios, viz., 100:0, 80:20, 70:30, 60:40 and 50:50% for T1, T2, T3, T4 and T5, respectively, in a randomized complete block design experiment with five animals per treatment that lasted for 90 days. The amount of CP supplied was 3.73, 10.15, 13.36, 16.57 and 19.79% per kg DM and the ME (MJ/kg DM) was 6.64, 7.51, 7.95, 8.38 and 8.82 for the respective treatments. Dry matter and nutrient intakes were measured daily, while live weight gain and feed conversion efficiency were recorded at the weekly interval. At the end of the feeding trial, all goats from each treatment were fasted for 12 h and slaughtered after taking the slaughter weight of each goat. Measurements were also taken on empty body weight, hot carcass weight, dressing percentage (DP) and rib eye muscle area. Concentrate supplementation of goats resulted in high (P 0.05) weak negative correlation (r = -0.16) between ADWG and the level of concentrate supplementation. Considering ADWG, FCE, DP and percentage of boneless meat, the diet with 20% concentrate level could be recommended for optimum live weight gain, feed conversion efficiency and carcass yield characteristics of goats. Keywords : Body Weight Gain; Carcass Yield; Feed Intake; Hararghe Highland Goats; Hay to Concentrate Ratio East African Journal of Sciences Vol. 1 (1) 2007: pp. 45-54

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不同干草精料比下哈拉尔河高原公山羊采食量、增重及胴体产量特征

选用25只体重17.6±0.11 kg的完整哈拉尔河高原公山羊，采用随机完全区组设计，在T1、T2、T3、T4和T5阶段分别饲喂干草精料比为100:0、80:20、70:30、60:40和50:50的饲粮，每处理5只，研究采食量、活增重和胴体产量特征。CP供给量分别为3.73、10.15、13.36、16.57和19.79% /kg DM, ME (MJ/kg DM)分别为6.64、7.51、7.95、8.38和8.82。每天测定干物质和营养物质采食量，每隔一周记录活增重和饲料转化率。饲喂试验结束后，各组山羊均禁食12 h，取屠宰体重后屠宰。测定空体重、热胴体重、屠宰率和肋眼肌面积。山羊精料添加量与平均日增重呈高度(P 0.05)弱负相关(r = -0.16)。综合考虑平均日增重、料重比、DP和去骨肉率，推荐饲粮精料水平为20%时，山羊的活增重、饲料转化效率和胴体产量特性最佳。关键词:体重增加;胴体产量;采食量;哈拉格高原山羊;东非科学杂志Vol. 1 (1) 2007: pp. 45-54

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来源期刊

East African Journal of Sciences

自引率

0.00%

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审稿时长

11 weeks