不同补充饲喂处理对黑山羊生长性能的影响

Effect of different supplementary feeding treatments on growth performance of black goats

试验旨在探究不同补充饲喂处理对黑山羊生长性能的影响。试验选择6月龄黑山羊60只,随机分为4组,各组3个重复,每个重复5只(公母比例为3∶2)。试验采取的饲喂模式为放牧+补饲,根据补饲量的不同设计如下处理:对照组不予以补饲;试验1组予以精料补充料0.10 kg/(只·d);试验2组予以精料补充料0.15 kg/(只·d);试验3组予以精料补充料0.20 kg/(只·d)。试验期100 d。结果显示:各组间黑山羊初体长、初体高、初胸围、初管围、初腰角宽度差异均不显著(P>0.05);各试验组黑山羊末体长、末体高、末腰角宽度均显著高于对照组(P<0.05)。试验3组黑山羊的末胸围显著高于对照组(P<0.05),试验3组黑山羊的末管围显著高于其他各组(P<0.05)。各试验组黑山羊末重、平均日增重均显著高于对照组(P<0.05),且以试验3组最高。试验3组净收入最高,为159.45元;对照组净收入最低,为59.36元。研究表明,不同补充饲喂处理均在不同程度上提高黑山羊生长性能、饲养经济效益,以补充精料饲养水平为0.20 kg/(只·d)效果更佳。

The purpose of the experiment was to study the effect of different supplementary feeding treatments on the growth performance of black goats. A total of 60 black goats, all aged six months, were randomly divided into four groups,with three replicates in each group and five replicates in each group(the ratio of male to female is 3∶2). The feeding mode adopted in the experiment is grazing+supplementary feeding. According to the different supplementary feeding amount,control group is not given supplementary feeding, each goat in group 1 was supplemented with concentrate 0.10 kg/d, each goat in group 2 was given concentrate supplement of 0.15 kg/d, each goat in group 3 was given concentrate supplement of0.20 kg/d. The test period was 100 d. The results showed that there were no significant difference in initial body length,initial body height, initial chest circumference, initial tube circumference and initial waist angle width among the groups(P>0.05). The end body length, end body height and end waist angle width of each test group were significantly higher than those of control group(P<0.05). The end bust circumference of black goats in group 3 was significantly higher than that in control group(P<0.05), and the end tube circumference of black goat in group 3 was significantly higher than that of other groups(P<0.05). The final weight and average daily gain of black goats in each test group were significantly higher than those in control group(P<0.05), and group 3 was the highest. The net income of group 3 was the highest, which was 159.45yuan. The net income of control group was the lowest, which was 59.36 yuan. The study indicates that different supplementary feeding treatments are beneficial to improve the growth performance and feeding economic benefits of black goats to varying degrees.