以春小麦两个品种内麦19和永良4为试材，在不同密度、施肥量处理下对春小麦群体库均形成与特性以及在产量形成中的作用进行了系统研究。结果表明，春小麦籽粒体积(库容量)随生育进程呈单峰曲线变化，籽粒干物重的增长(库的充实)随生育进程呈S型曲线变化；每穗结实粒数(库)与开花期群体干物质源的供应呈显著正相关。籽粒体积与灌浆速率及粒重呈极显著正相关，由此说明扩大库容(籽粒体积)，可以促进源的生产、运转与积累，提高籽粒重量。

The formation and characteristics of population sink were studied using two spring wheat varieties under different treatments of density and fertilizer. The results showed that the grain volume (sink capacity) of spring wheat changed as a single peak curve, the grain dry matter increase (filling of sink) changed as a S curve along with the growth, and the number of grains (sink) per spike was related positively to the dry matter (source) supply in florescence. The grain volume appeared extremely a notable positive relation to grain filling rate and its weight. Hence, enlarging sink capacity (grain volume) could enhance the production, delivery and accumulation of source and improve grain weight.