沙化地日光温室黄瓜配方施肥数学模型的建立

为探寻沙化地日光温室内黄瓜的最佳施肥方案,采用三因素五水平二次回归正交旋转组合设计,通过计算机模拟寻优,建立了在含沙量为237.6 g/kg的沙化土中氮、磷、钾施肥量与黄瓜产量的数学模型。通过对数学模型的解析,探讨了氮、磷、钾肥的单因子效应、互作效应、边际产量和最佳施肥量。结果表明,在该土壤条件下的日光温室内,氮(N)、磷(P2O5)、钾(K2O)肥施用量分别为264.28,82.94和290.34 kg/hm2时,黄瓜可达到的最高产量为114 045.30 kg/hm2。

Construction of mathematic model for solar greenhouse cucumber balanced fertilization in the sandy land

By means of quadratic component rotational design,the experiment was conducted in order to get an optimized fertilization scheme for high yield cucumber production.A mathematic model involving the N,P,K and cucumber yield was established by computer optimization under the condition of sandy land with a sand content of 237.6 g/kg.Based on the model,the paper analyzed the effect of single factor and interaction of N,P,K,the marginal yield and the optimal fertilizer application.Under this soil condition,the result showed that the amount of N,P_2O_5 and K_2O for the highest yield were 264.28,82.94,290.34 kg/hm~2 and 114 045.30 kg/hm~2 respectively.