日光温室西葫芦水肥耦合效应量化指标研究

The effect of water-fertilizer coupling on the quantitativeindex of summer squash 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、氮肥、钾肥的耦合效应对西葫芦产量的影响,得到西葫芦产量对3因素的回归数学模型。结果表明:1在本试验条件下,3因素对西葫芦产量的影响顺序为氮>水>钾。2各因素间存在交互作用,水与氮、水与钾、氮与钾分别在低于0.6302与1.9280,0.6302与0.3392,3.9704与-3.9970水平时,与产量存在正相关关系,在高于以上水平时又呈负相关关系。经计算机模拟,当西葫芦达到最高产量(88578kg/hm2)时,相对应的灌水量为2515.5m3/hm2,施氮、施钾量分别为583.1和265.4kg/hm2。对试验结果进行验证表明,构建的模型准确可靠。

By means of quadratic general rotational combination design,the comprehensive effects of H2O,N,K2O fertilizer on the squash were studied,three water-fertilizer coupling regression models demonstrating the relationships between yield and factors were established.Analysis results showed that:① The effect of three factors on the yield of squash increased by degree in the series of N>H2O>K2O.② The interaction among these three factors existed.There is positive interaction among them in the level lower than 0.630 2 and 1.928 0,0.630 2 and 0.339 2,3.970 4 and -3.997 0;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 2 515.5 m^3/hm^2,583.1 kg/hm^2,265.4 kg/hm^2 respectively.The vertification experiment proved that the model is accurate and reliable.