中文摘要：

基于刈割演替实验及放牧场调查，对内蒙古羊草草原在放牧和刈割干扰影响下群落能量固定与分配规律进行了研究，结果显示：在多年的刈割和放牧干扰影响下，羊草种群能量现存量明显下降，糙隐子草显著增加；刈割没有对大针茅种群产生明显影响，而中轻度放牧显著促进了该种群的发展；群落能量向根系的分配及根系能量向0-10cm层的分配比例增加．

英文摘要：

Based on the mowing succession experiment and investigation of rangelands, we studied the changes of energy fixation and allocation of Leymus chinensis steppe in Inner Mongolia. The results showed that the energy standing crop of L.chinensis population obviously declined and that ofCleistogenes squarrosa increased under both mowing and grazing for many years. Stipa grandis population didn＇t change obviously under mowing but increased in proportion under light and moderate grazing. The energy standing crop of community declined obviously, the proportion of root energy accounting for the whole community energy and that of 0 ～ 10cm layers accounting for 0 - 30cm layers increased under successive mowing and grazing.