中文摘要：

以短花针茅草原为研究对象,设置5个放牧强度季节调控试验处理和对照处理,研究了不同放牧强度季节调控对短花针茅荒漠草原优势种群的影响,结果表明：除对照区外,短花针茅、无芒隐子草、旋花、碱韭高度、密度、地上现存量、重要值春季不放牧＋夏季重牧＋秋季适牧和春季不放牧＋夏季适牧＋秋季重牧两种放牧处理均高于其他放牧处理,是合理可行的草地利用方式。

英文摘要：

The experiment was conducted in stipa breviflora desert steppe, we sat up 5 seasonal regulation of grazing intensity treatments and control treatments. Studying on the dominant species population under the differ ent seasonal regulation of grazing intensity treatments. The results showed that the height,the density, the above ground standing crop,the importance value of Stipa breviflora, Cleistogenes songorica, Convolvulus ammannii and Allium polyrhizum in SA1（not grazing in spring,heavy grazing in summer and moderate grazing in autumn） and SA2（not grazing in spring,moderate grazing in summer and heavy grazing in autumn） were higher than that other grazing treatments, In addition to the control area,it is a reasonable and feasible way of grassland grazing.