放牧绵羊的生物学效率

THE BIOLOGICAL EFFICIENCY OF GRAZING SHEEP

采用消化代谢试验方法，研究了放牧绵羊生物学过程的功能。试验结果表明，牧草的营养价值随着粗纤维含量的增加而降低，其中每公斤牧草干物质中的可消化蛋白７、８、９、１０月分别为１０８．７４、７１．７１、５３．１７和３３．４１ｇ；牧草蛋白的生物学效率相应是１６．６７％、１４．２９％、１４．４５％和５．７７％。依据系统功能，研究提出了通过放牧管理──转移牧草或家畜，调节土壤、牧草和绵羊三者的关系，使其供求平衡，达到持续有效生产和保护生态环境的目的。

Using digestive metabolic testing method, the action of biological course of grazing sheep was studied.The result showed that the nutrient value of herbage abated by the increasing contents of crude fibre.And the soluable protein in dry matter of per kilograme herbage was 108.74,71.71,53.17 and 33. 44 grame,respectively,in July,August,September and October;the biological efficiency of herbage protein was respectively 16.67%,14.29%,14.45%and 5.77%.According to systematical action,the paper has put forward transforming herbages or animals by grazing management and adjusting the relation between soil and herbage and sheep to balance between supply and demand and to achieve the goal of sustaining effecient production and protect ecological environment.