稻鸭共育体系多因素正交旋转回归试验研究

以水稻种植密度、纯N量、放鸭数3个因子,设置5个水平组成正交旋转回归试验,试验数据分析显示,3个因子对水稻产量影响显著,影响的大小顺序是放鸭数>纯N量>密度,而且密度与纯N量的交互作用明显,纯N量与放鸭数之间的交互作用明显,都达到显著水平.通过方程模拟选优得出,密度在18万~25.5万株/hm2之间、纯N量在72.9~131.85 kg/hm2之间、放鸭数取225~360只/hm2之间,水稻单产可达到较高水平.

Studies on effects of paddy yield using quadratic regression orthogonal rotational combining design in the rice-duck farming system

There are three factors in the five levels compositions orthogonal experiment: the density(X1),the pure N quantity(X2), tends ducks number(X3).Through computer assistance,observed three factors under five different horizontal fields to rice's output.According to the obtained data material: three factors are remarkable to the paddy rice on output influence,the influence size order is X3>X2>X1,the correlation between X1 and X2,X2 and X3 is obvious,which all achieves the remarkable level.Elects superiorly through the equation simulation and obtains the best level combinations of three factors,the density between 180 000 and 255 000/hm2 and the nitrogen between 72.9 and 131.85 kg/hm2 and tends ducks the number between 225 and 360/hm2.