沙化草地春季禁牧研究初报

A Preliminary Study of Deferred Spring Grazing on Grassland Vegetation and Animal Production in a Sandy Grassland Area

在锡林郭勒典型草原南部的浑善达克沙化草地进行了春季禁牧试验。从 4月中旬到6月中旬的 5 0～ 70d禁牧期间 ,对牲畜进行舍饲 ,对牲畜体重变化和草地生长情况进行监测 ,并与传统的自由放牧进行了比较。结果显示 ,春季禁牧有效地保护了植物 ,植物生长速度和植被盖度得到了极大的提高。禁牧舍饲牛的增重要高于自由放牧的对照 ,而舍饲羊的增重要小于自由放牧的对照。根据禁牧后饲草收益和家畜表现所做经济分析来看 ,春季禁牧制度是一项既能有效保护草地生态环境又能保证畜牧业高效生产的可行措施。

A deferred spring grazing experiment was conducted on a deteriorated grassland in the Hunshandake sandy land of southern Xinlinguole stippe. Animals were shed fed during the off pasture period. Plant growth and animal liveweight gains were measured in the plots during a 50～70 days of non grazing period started from middle of April in comparison with the season long continuous grazing. Results showed that plant growth was greatly benefited from the non grazing treatment in terms of growth rate and vegetation coverage.