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采用二次回归正交旋转组合设计,研究杂交粳稻新组合滇杂35产量与栽插密度及N、P、K施用量间的关系,建立了各因素与产量的数学模型。各因素对滇杂35产量影响大小依次为栽插密度>施氮量>施钾量>施磷量。提出了滇杂35获得8.42t/hm2以上产量的栽插密度及N、P、K施用量优化配比方案:即栽插密度24.743万～27.345万穴/hm2,N施用量257.625～306.900kg/hm2,P2O5施用量151.725～178.275kg/hm2,K2O施用量165.525～199.950kg/hm2。
The quadratic regression orthogonal rotation combination design was used to study the relationship between the yield and the transplanting density and N, P and K application rate of hybrid rice Dianza 35, and the mathematical model of each factor and yield was established. The effects of various factors on the yield of Dianza 35 were as follows: planting density, nitrogen application rate, potassium application rate and phosphorus application rate. Proposed Dianza 35 yield above 8.42t / hm2 planting density and N, P, K application rate optimization program: planting density 247.43 million to 27.345 million holes / hm2, N application rate of 257.625 ~ 306.900kg / hm2, 151.725 ~ 178.275kg / hm2 for P2O5 and 165.525 ~ 199.950kg / hm2 for K2O.