氮磷肥及种植密度对茄果产量的影响

The Impact of Fertilizer N, P and Planting Densityon The Yield of Eggplant as Fruits

采用正交区组二次回归旋转组合设计，在土壤差异较大的大田条件下建立了氮、磷肥及种植密度对茄果产量的生产函数，按边际分析原理探讨了氮、磷对茄果产量的影响因素。结果表明：在土壤差异较大的大田条件下，进行二次回归旋转试验时采用正交区组设计，能够有效地提高模型的拟合效果，可谓正交区组是局部控制的好方法；在土地条件较差的瘠薄地上采用高密度载培是提高茄果单产的有效措施之一；氮肥与磷肥间的交互作用显著，并在一定条件下存在着相互替换性。

With the rotary society of the secondary regression of orthogonal block design,productivefunction was made on fertilizer N, P and planting density towards the yield of eggplant in the condition of!quite different soil, According to the theory of marginal analysis, the impact factors of fertilizer N, P on theyield of eggplant as fruits were approached. Results revealed that when the rotary experiment of secondaryregression had been! done in the condition of quite different soil, if the ! orthogonal block design was adopted,it could effectively increase the fitting effect of model·This means that orthogonal block is good way to partly control;! Adopting high density culuivation was an effective measure to improve the perunit area yield ofeggplant as fruits in the poor soil condition ; There was significant interaction between the fertilizer N and P,and there was mutual replancement in certain condition.