陵川半细毛羊不同饲养方式不同月龄屠宰经济效益的分析

陵川半细毛羊是我省培养的新类群。本试验旨在测定其产肉性能,最佳屠宰月龄,一般饲养及短期补饲肥育的经济效益,探讨最佳经济效益的饲养途径。试验结果表明,八月令为最佳屠宰月龄,其产肉性能和经济效益最高(二十月龄次之,十三月龄最差),肉毛比例将近2:1,其产值比率为二十月龄的2.64倍。在分期饲养试验中,跑茬期羊群在放牧时获得足够营养,虽不补充饲料其日增重仍高于青草期,确为我省羊群增膘的黄金季节。枯草期反为增重最快,说明短期补饲可以促进羊群的生长发育,从而提高了经济效益。

The stuay of Economic Eficiency for killing in Diferent Months Old and Feeding Systems on Lin Chuan middle-fine-wool sheep

Middle-fine wool Sheep of Lin Chuan is a new variaty cul tured by our province. This tudy aims to definite it's property of producing meats, the best age for killing economic efficiency of general feeding and adding feed for fatling within short time, and find out a path of the best economic efficiency for raising. Rresults show that 8 months old is the best age for killing. Since, it's property of producing meats and economic efficiency are the best, The ratio between meat and woof is almost equal to 2 to 1, and it's output is 2.64 times higher than at the age of 20 months. Divided-period test shows that the everage increase in daily body weight is still higher in seeds-mature, period than in green-grass period although any supplement of feed do not be given becouse of the animals can take sufficient nutrition during mature period. So it is the gold season of growth, The fact of the body weight to increase during withered period proved that implement of feed for short time could promote growth and economic efficieecy of sheep. From this, the auther suggests that killing lamb within the same year in order to promote efficiency, shorten feeding-period, appease the presure of lack in feed in winter and spring maintain ewes' persentage in herds, and create a condition for gradually elevating meats efficiency, increase persentage of sheep for sale, and rise economic efficieny.