氮磷钾施用量与日光温室西瓜产量的相关性研究

Correlation studies between application rates of N,P,K and yield of watermelon in sunlght greenhouse

采用3因素二次回归通用旋转组合设计,对氮磷钾施用量与日光温室西瓜产量的相关性进行了研究,建立了三元二次回归方程,并通过F检验表明:氮、磷、钾3因素皆与产量存在相关性,影响西瓜产量的顺序为:N>P>K.经计算机模拟,当施氮肥(N)为717.00 kg/hm2,磷肥(P2O5)为225.00 kg/hm2,钾肥(K2O)为717.00 kg/hm2时,西瓜产量最高,最高产量为24 621.77 kg/hm2.

The regression method of quadratic general rotary unitized with 3 factors was used to analyze and simulate the level of fertilizer （N, P, K） applied to watermelon in sunlight green house for high-yield, hence the regression equation was set up. The relationship between the application of level of fertilizer （N, P, K） and the yield of watermelon was analyzed, in addition, the order of three fertilizers＇ effect on the yield from high to low was as follows：N〉P〉K. By simulation with computer, when the fertilizer quantity was N 717.00 kg/hm^2, P2O3 225.00 kg/hm^2 and K2O 717.00 kg/hm^2 respertively, the highest yield of watermelon could reach to 24621.77 kg/hm^2.