中文摘要：

为了促进草原放牧饲养的科学化管理，研究了内蒙古典型草原的生物量形成过程和适宜的放牧要素参数。结果表明，内蒙古典型草原的生物量形成过程为单峰型生长曲线，日产量为双峰型生长曲线，春季适宜的放牧开始时间为5月中下旬，放牧频次宜为1／30天（放牧间隔期为30天），放牧期内最佳载畜率为8个羊单位～9个羊单位，9月下旬或10月上旬结束放牧，放牧120d～140d，放牧季单位面积羔羊生长增重潜力为160kg-180kg，并至少增加23％的草产量，具有极好的经济效益。表1，图5，参27。

英文摘要：

For promoting management of Inner Mongolia steppe, we evaluated the processes of grassland biomass formation and suit- able grazing parameters. The results show that forage biomass is a single peak curve while the diurnal forage yield is a double peak curve during the period of spring to autumn. Based on the forage yield dynamics and phenology, we recommend the grazing date starts from the last ten-day of May, and ends in the last ten-day period of September or the first ten-day of October for a period of 120 d ~ 140 d. The optimal stocking rate is 8 Au· hm-2 ~ 9 Au· hm-2 （sheep） for the grazing season. The growth potential of grazing lambs could at- tain 160 kg·hm-2 ~ 180 kg·hm-2, and at least a 23% increase in grass yield, and thus has very good economic benefits.