温室茄子水肥耦合数学模型及其优化方案研究

Effect of Water-Fertilizer Coupling on Maths Model and Optimized Scheme of Eggplant in Greenhouse

采用 3因素二次回归通用旋转组合设计 ,研究了灌水量、钾肥、磷肥的耦合效应对茄子的影响 ,得到茄子产量对 3因素的回归数学模型。结果表明 :1在本试验条件下 ,3因素影响茄子产量的顺序为施钾量 >灌水量 >施磷量。 2各因素间存在交互作用 ,水与钾、水与磷、钾与磷在低于 1.132和 2 .312 ,0 .714和 0 .4 31,- 4 .2 89和 4 .0 92水平时对产量存在正相关关系 ,在分别高于以上水平时又会呈负相关关系。经过计算机模拟 ,得到茄子最高产量达76 4 5 9.34kg/ hm2 时 ,相对应的灌水量、施钾量、施磷量分别为 2 90 4 .6 m3/ hm2 、78.6 kg/ hm2 、15 .5 kg/ hm2 。对试验结果进行的验证表明 。

By means of quadratic general rotational combination design, the comprehensive effects of H_2O,N,K_2O fertilizer on eggplant was studied, three water-fertilizer coupling regression models demonstrating the relationships between yield and factors were established. Analysis results showed:①The effect of three factors on the yield of eggplant increased by degree in the series of K_2O>H_2O>P_2O_5.②The interaction among these three factors existed.There is positive interaction among them in the level lower than 1.132 and 2.312, 0.714 and 0.431,-4.289 and 4.092;and negative interaction among them higher than the levels. By simulation with computer, the amount of N,H_2O and K_2O for the highest yield were 2 904.6 m^3/hm^2,78.6 kg/hm^2,15.5 kg/hm^2 respectively. The experiment proved that the model is accurate and reliable.