银杏密植丰产园肥料效应初步研究

The research on effect of fertilization in Ginkgo orchard

应用二次回归正交试验设计方法 ,研究了不同肥料配比及施肥量对银杏种子产量的影响。结果表明 :银杏采种园配方施肥能够显著增加种子产量 ,好的处理组合可比对照平均增产 6 9.1 % (常规施肥 )和 2 95 .5 % (不施肥 ) ;平均增加收入 1 4 4.34元·株 -1和 2 6 4元·株 -1。 1 4a生嫁接植株最佳施肥量N :1 .948kg·株 -1、P2 O5:0 6 85kg·株 -1、K2 O∶2 .0 38kg·株 -1,三者之比约为 3∶1∶3。N、P、K三元素对种子产量的肥料效应方程为 :Y =48 6 +3 9896 5 5X1+2 .370 0 6 3X2 +8.6 46 44 4X3 +0 .46 875X1X2 - 3.6 31 2 5X1X3 +0 .39375X2 X3 +1 8 995 99X12 - 3.5 1 2 6 2X22 +0 .1 936 83X3 2 。

For studying the effect of fertilization on seed production in Ginkgo orchard, the experiments were carried out with various kinds and quantity of fertilizers by cubic regression design. The result showed that the optimum fertilizer prescription for the 14-year-old grafted trees was N: 1.948 kg, P 2O 5:0.685 kg and K 2O:2.038 kg. The regression equation of fertilizer effect was Y =48.6+3.989 655 X 1 + 2.370 063 X 2 + 8.646 444 X 3 + 0.468 75 X 1X 2-3.631 25 X 1X 3 + 0.393 75 X 2X 3 + 18.995 99 X 1 2-3.512 62 X 2 2+0.193 683 X 3 2. The yield increased by 69.1% and 295.5% higher than the control (normal and no fertilization) respectively, the benefit increased by 144.36 yuan/tree and 264 yuan/tree respectively when treated with optimum fertilizer.