摘要
试验结果表明:藏系羔羊日粮中精料比例越高,个体增重、饲料转化率达到最大的时间就越长,曲线的峰值就出现的越晚。各育肥期羔羊个体增重在育肥组之间差异不显著,但同一育肥组羔羊的个体增重在不同育肥期之间差异显著(P<0.05)。3个育肥组和对照组羔羊个体总增重的顺序为:第1组>第3组>第2组>对照,且它们的增重率分别为51.27%、50.08%、48.75%和-8.25%,且3个育肥组羔羊个体增重极显著地高于对照组(P<0.01)。不论从羔羊个体增重,还是从饲料转化率的角度考虑,利用相应的日粮组成育肥1岁羔羊时,第1组、第2组和第3组分别不能少于50d、40d和40d。3个育肥组羔羊个体增重与实际采食量之间均呈显著的正相关关系,且第1、第2和第3组的线性回归方程依次为:Y=0.5951X-4.7596(r=0.8037,P<0.05);Y=0.5456X-6.2214(r=0.8587,P<0.05);Y=0.2418X-6.408(r=0.8474,P<0.05)。当X=7.998kg/10d·只,11.403kg/10d·只和26.502k/10d·只时,第1组、第2组和第3组羔羊的个体增重均为零,即在这种采食量水平下,只能够维持各组羔羊的基础代谢,只有采食量大于这种水平时,羔羊才能进行净生产。
The tria results indicated that the higher the ratio of concentrate in ration was, the longer the time when the liveweight gain and food efficiency of yearling tibetan sheep yearling was. and the later the peak of gain curve for lambs reached to. There was not sigrificart difference between gain of lambs in every group, but the difference was sigrificart between one of different fattening periods in the same group (P < 0.05). The order of live weight gain among the three fattening and control groups was:the first group > the third group > the second group > the control group, and there rate of live weight gain was 51.27% ,50.08%, 48.75% and - 8.25%, resp, and the individual gain of lamb in the three fattingeuing groups were significantly hight than the control group ( P < 0.01). Whatever thinking according to the indiridual gain of lambs or food efficiency. the days of fattening yearling Tibetan sheep with corresponding ration were not less than 50d 40d and 40d for the first the second and the third group respectively. The body weight gain of three fattening groups was significantly correlated with their true intake and linear regression equation for the first , the second and the third group was respectively. the first group Y = 0.5951X-4.7596(r = 0.8037, P < 0.05), the second group Y = 0.5456X - 6.2214(r = 0.8587, P < 0.05), the third group Y = 0.2418X- 6.408(r = 0.8474, P < 0.05), And the individual gain of the second and third group was zero when the true intake X = 7.998,11.403 and 26.502 kg/10d·head respectively which could only maintain the basai metabolism of lamb for every group . If only intake of every lamb for corresponding fattening group was more than this lamb could conduct net prodeuction
出处
《青海畜牧兽医杂志》
2003年第5期3-6,共4页
Chinese Qinghai Journal of Animal and Veterinary Sciences
基金
国家"十五"攻关项目(编号2001BA606A-05)
关键词
高寒牧区
藏系绵羊
冬季
暖棚育肥试验
饲料搭配
Alpine-cold pasture region
Yearling Tibetan sheep
Winter
Hothouse fattening