供试品种为武育粳2号.设分蘖肥、促花肥、保花肥、粒肥及水分等处理,研究其对一、二次枝梗各粒位籽粒粒重和饱粒率的影响.结果表明:(1)施氮量、施肥时期、土壤水分状况对不同粒位籽粒饱粒率和粒重的影响程度不同;(2)在一次枝梗六个粒位中,第1粒的饱粒率既有最高的,也有最低的,还有处于2—5位的,其它粒位也是如此,二次枝梗籽粒亦有类似趋势;(3)二次枝梗各粒位籽粒的粒重顺序与开花早迟一致,一次枝梗籽粒除第二粒外,其它粒位籽粒的粒重顺序因栽培条件不同而变化. The test variety was Wuyujing 2. The effects of tillering, promoting flower, fertilizer, fertilizer and moisture on the grain weight and grain-filling rate of the first and second branchlets were studied.The results showed : (1) The effects of nitrogen application rate, soil fertility period and soil moisture status on the grain filling rate and grain weight of different grain positions were different; (2) Among the six grain positions of primary branch, the grain filling rate Both highest and lowest, and also in 2-5 positions. The same was true for other grain positions, and similar trends were observed for the secondary branchlets; (3) Flowering early and late, a branch of the grain except the second grain, the grain weight of other grain weight order changes due to different cultivation conditions.