苏协粳在淮北稻区一般5月上旬播种,8月中旬齐穗,10月初成熟,全生育期150天左右,是一个迟熟中粳型品种。该品种穗型大、米质优、产量高,但每穗粒数变幅较大(100～200粒),开花受精后有分批灌浆结实的现象。为了探索苏协粳在不同栽培条件下灌浆结实的规律,掌握最佳齐穗期,提高结实率,挖掘大穗多粒的高产潜力,我们研究了不同播栽期、不同亩穗数和单穗不同颖花量对结实的影响,结果如下: (一)不同播栽期稻穗分批灌浆结实情况 Suji japonica rice is planted in the early May in Huaibei rice area, mid-August and full ripening in early October. The whole growth period is about 150 days. It is a late maturing japonica rice variety. The varieties of large panicle type, high quality rice, high yield, but larger grain size per panicle (100 ~ 200), after flowering and fertilization grouting strong phenomenon. In order to explore the law of GMS in different cultivation conditions, to grasp the best heading stage, improve the seed setting rate and tap the high yield potential of big spike and grain, we studied the effects of different planting stages, The effect of different amount of spike on the firm, the results are as follows: (a) at different sowing stage rice grain filling grouting