山羊补饲与草畜平衡及其系统经济效益分析

为了探究不同放牧处理下山羊补饲、草畜平衡、畜牧业生产经营效益的变化规律，测定了不同牧压下山羊补饲精料、配比组成与成本和山羊体重变化，并对放牧系统经济效益进行核算。经过补饲后，高、低载畜率组羔羊日增重分别为153.8、140.2 g，两组差异显著(P＜0.05)；高载畜率组大多数情况下过牧严重，而低载畜率组又放牧不足，造成草地资源的浪费；高、低载畜率组经济效益分别为113315、64590元，两组毛利、羊的效益分别为2060、1845元；经过补饲后，两组经济效益已存在较大差距，应重视补饲的作用。

Analysis on the Supplementary Feeding of Goats, Grass-livestock Balance and System Economic Benefits

Studies on changes of supplementary feeding of goats,grass-livestock balance and economic benefits of animal husbandry production under different grazing treatments were conducted.The goat supplementary feeding concentrate,its compositions,the costs and goat weights under different grazing rates were measured and the economic benefits of grazing systems were calculated.The lamb daily gains of heavy-and low-grazing after supplementary feeding were 153.8 g and 140.2 g respectively and the difference was significant（P 0.05）.In most cases,there would be overgrazing with heavy-grazing and lack-grazing with low-grazing,resulting in the waste of forage resources.The economic benefits of heavy-and low-grazing were 113315 Yuan and 64590 Yuan,and gross benefits per goat were 2060 Yuan and 1845 Yuan respectively.There was a big difference in economic benefits between heavy-and low-grazing after supplementary feeding.