对春小麦两个品种在不同密度、施肥量处理下群体库源比值（粒叶比）在产量形成中的作用和相互关系进行了系统的研究，结果表明：在合理的栽培措施下，实现源、库的协调是小麦获得高产的生理基础。叶片单位面积负荷量（粒数／叶）与叶片单位面积有效生产量（粒重／叶）呈极显著正相关。在适宜的群体叶面积指数范围内，采取优化栽培措施，争取形成较多的结实粒数（库容），并提高粒重（库的充实度），是实现高产的有效途径。

Two spring wheat varieties were grown with differen density and fertilizer rates, and the interaction between sink and source and their ratio in the population on the yield of the crop were studied. The results showed that the establishment of a harmonious relation between source and sink through appropriate agronomic techniques is the physiological basis for the realization of high yield. The leaf load per unit are (grain number/leaf) was found to be in a highly significant correlation with effective production per unit area (grain weight/leaf). Within a rational population leaf area index, adopting optimum cultivation techniques to increase the number of filled grains (sink capacity) and improving grain weight (filling rate of sink) constitute the effective approaches to gain high yield.