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中文摘要：
为了对玛曲县草地初级生产力及栽畜能力进行评价，以指导生产，更加合理利用当地天然草地资源。运用甘肃省玛曲县野外调查和MODIS遥感影像资料，计算玛曲县及下属各乡的产草量和载畜量，对比分析了理论载畜量和季节牧场载畜量，并进行草地分级。结果表明：导致玛曲县草地生产力变化的主要原因是超载过牧和自然环境如气温升高、年降水量减少、草地日趋干旱缺水等。载畜量变化的逆向走势使草地生产力下降，而自然因素能在一定程度上引起草地荒漠化。因此，必须严格控制载畜量，并以最新的理论载畜量和临界载畜量来界定实际载畜量，以扭转载畜量的逆向走势，遏制草地生产力的下降趋势。
英文摘要：
In order to guide the production and use local naturally grassland reasonably, an assessment was conducted on grassland primary production and livestock carrying capacity in Maqu County, Gansu. By used the materials from field investigation on Maqu County of Gansu Province and MODIS images of remote sensing, the carried capacities on theory and seasonal ranges were compared and analyzed based on calculated grassland yields and grazing capacities and grassland ranking was conducted in this paper. The general results of study indicated, the main reasons that led to change on grassland productions of Maqu County were excessive grazing livestock and natural climate conditions such as increasing temperature, decreasing annual precipitation which brought about inadequate rainfall on arid grassland. The reverse tend of change on carrying capacities caused the reduction of grassland productions, and natural climate conditions led to the desertion of grassland in some extents. Consequently, the carrying capacities must be strictly controlled and the practically grazing capacities should be set based on the new theoretical and critical carrying capacity in order to turn back the reverse tend of grazing capacity and eliminate the reduction of grassland productions.
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