【摘要】 本文采用正交区组旋转组合设计，定量分析了氮、磷、钾不同施肥量对水稻产量构成因素的影响，并分别建立了其数学模型.对模型的效应分析结果表明：施氮量对产量构成因素的影响最大，一般增施氮肥可以增加平方米穗数和重穗粒数，但结实率和千粒重反而呈下降趋势；施磷量的增加有利于提高平方米穗数、穗粒数和结实率，但不利于千粒重的提高；施钾量的增加有利于结实率和千粒重的增加.更多还原

【Abstract】 With the rotary society of the secondary regression of orthogonal block design,analyzed the effect of different amount of fertilizer N.P and K on the factors of rice production,and seperately established mathematical models. The results of model showed: Nitrogen levels had the greatest effect on the factors of rice prodution. With the increase of fertilizer N, the number of spikes and grains of per squre meter increased, but cropping rateand the weight of thousand grains decreased; With the increase of fertilizer P, the number of spikes grains of per squre meter and cropping rate increased, but the weight of thousand grains decreased; Increasing fertilizer K, increased the weight of thousand grains and cropping rate.更多还原