以盐粳１８７为材料，采用二次回归通用旋转设计，研究不同栽插密度，基蘖肥与穗肥比例，搁田时苗数占预期穗数比例，对产量形成及群体质量的影响。并建立数学模型，通过微机模拟选优，得出盐粳１８７亩产５００ｋｇ以上，适宜栽插密度为每亩２９１５±０１８万穴，基本茎蘖苗１３９９±０８６万。在每亩总施氮量１７５ｋｇ条件下，穗肥占总施氮量３８６７％±３５６％，搁田时苗数占预期穗数的７８５％±３１％ Using salt japonica 187 as material, the quadratic regression general rotation design was used to study the effects of different transplanting density, ratio of basal tiller fertilizer to panicle fertilizer, the proportion of spikelets per plant on the expected number of spikes on yield formation and population quality. And set up a mathematical model. Through computer simulation, the result shows that the production of salt japonica 187 mu is more than 500 kg, and the planting density is 2915 ± 018 000 acre per mu and the basic stems and tillers 1399 ± 0.86 million . Under the total nitrogen application rate of 175 kg / acre, the total nitrogen application rate was 3867% ± 356%, while the number of seedlings in field was 785% ± 31%