Responses of temporal dynamics of aboveground net primary productivity of Leymus chinensis community to precipitation fluctuation in Inner Mongolia
内蒙古羊草草原植物群落地上初级生产力时间动态对降水变化的响应

This paper describes the relationship between aboveground net primary productivity (ANPP) and precipitation in Leymus chinensis community based on the observations made in Inner Mongolia grassland from 1981 to 1994. Our results showed significant differences in annual and seasonal precipitation patterns. Most of the annual precipitation was distributed between June and August with the highest in July. A quadratic relationship was discovered between the ANPP and the accumulative precipitation from the October in previous year to the August of current year; however, no significant correlation between the ANPP and annual or monthly precipitation was detected. The identification of the period of accumulative precipitation appeared to be important in developing a NPP model for the Leymus chinensis community.