氮、磷、钾、硅肥配施对水稻产量及其构成因素的影响

在大田条件下 ,应用四因素五水平二次正交回归组合设计方法 ,研究了山西石灰性草甸土壤合理施用氮、磷、钾、硅肥对水稻产量及其构成因素的影响。结果表明 :氮、磷、钾、硅肥的合理配施对水稻产量的形成有极显著的促进作用 ,四因素与产量的主效应回归方程为y =6973.5+2 4 89x 1+7.912x 2 +7.388x 3 +7.0 4 72x 4 。氮肥主要是通过影响有效穗、穗粒数、结实率、千粒重而促进产量的形成 ,磷肥主要是通过影响有效穗、穗粒数而促进产量的形成 ,钾肥主要是通过影响有效穗、结实率而促进产量的形成 ,硅肥主要是通过影响千粒重、结实率、穗粒数、有效穗而促进产量的形成

The Effects of Combined N-P-K-Si Fertilization on Rice Yield and Component Factors

The experiment was conducted on calcareous soil of Shanxi province with design of ordinary second order straight regression of four factors. Under the condition f experiment combined application of nitrogenous fertilizer (N), phosphate fertilizer (P), potash fertilizer (K) and silicon fertilizer (Si) to rice was studied for its effects on yield and component factors. The results showed: applying proper N P K Si fertilizer can significantly increase rice yield. The regression equation of N P K Si fertilizer to yield is y=6973.5+24 89x 1  +7.912x 2  +7.388x 3  +7.042x 4  . N fertilizer can increase rice yield by increasing effective ears, seeds per ear, setting percentage and 1 000 grain weight; P fertilizer can increase rice yield by increasing effective ears and seeds per ear; K fertilizer can increase rice yield by increasing effective ears and setting percentage; Si fertilizer can increase rice yield by increasing 1 000 grain weight, setting percentage, seeds per ear, effective ears.