群落初级生产力积累动态呈单峰值曲线，大体可分为“缓增型”和“急增型”两种。
Dynamic state of the accumulated primary productivity is in conformity with in single peak value.
结果表明：降水量的年度变化及其季节分配直接导致了克氏针茅草原群落初级生产力的年度波动；
The results show that annual changes and seasonal distribution of precipitation led to the fluctuation of the primary productivity of the community;
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