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采用二次回归通用旋转组合设计方法 ,系统地研究了肥密因素对纯系高粱品种沈 1 3 4 7生长发育和产量的影响。通过计算机模拟 ,得出产量与密度 (X1 )、施氮量 (X2 )、施磷量 (X3)三因素间的关系方程 :Y =6 96 3 .1 86 +2 1 7.2 2 7X1 +75 .1 95X2 +82 .3 8X3- 2 9.0 7X1 X2 +1 8.5 5 5X1 X3+1 2 9.5 5 5X2 X3- 2 6 6 .475X1 2 - 1 81 .0 5X2 2 - 1 40 .2 5X32 ,并提出最高产量时的肥密组合为 :密度 1 2 6 0 75株 /hm2 ,纯氮 1 1 1 .9kg/hm2 和纯磷 6 7.0 5kg/hm2 。最佳经济效益的肥密组合为 :密度 1 2 5 95 5株 /hm2 ,纯氮 96 .1 5kg/hm2 ,纯磷 42 .75kg/hm2 。
The quadratic regression general rotation combination design method was used to systematically study the effects of different fertilizers on the growth and yield of Shenliang sorghum Shen 1 3 4 7. Through computer simulation, the relationship between yield and density (X1), nitrogen (X2) and phosphorus (X3) was obtained: Y = 6 96 3 .1 86 +2 1 7.2 2 7X1 +75. 1 95X2 +82 .3 8X3-2 9.0 7X1 X2 +1 8.5 5 5X1 X3 + 1 2 9.5 5 5X2 X3- 2 6 6 .475X1 2 - 1 81 .0 5X2 2 - 1 40 .2 5X32 with the highest yield When the combination of fat and dense: density 12 6 0 75 plants / hm2, pure nitrogen 1 1 1 .9 kg / hm2 and pure phosphorus 6 7.0 5kg / hm2. The optimal combination of fertilizer and fertilizer is as follows: the density of 125955 plants / hm2, the pure nitrogen of 96.151kg / hm2, the pure phosphorus of 4275kg / hm2.