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为了明确内蒙古河套黄灌区食用向日葵氮、磷、钾肥料及密度效应,采用四因素二次回归正交设计法进行试验研究。结果表明,内蒙古河套黄灌区不同密度与不同氮、磷、钾肥梯度配合种植食用向日葵,其产量具有显著增产效果,并能用四元二次多项式表达,最高理论产量可达327.9kg/667m2,最佳产量时肥料的最佳配比为N∶P∶K=1.54∶1.00∶1.16,最佳密度为2494株/667m2。
In order to clarify the effects of nitrogen, phosphorus and potassium fertilizer and density on edible sunflower in Hetaohuang Irrigation Area in Inner Mongolia, four factors quadratic regression orthogonal design method was used to carry out experimental study. The results showed that the output of edible sunflower with different density, different N, P and K gradients in Hetaohuang Irrigation Area of Inner Mongolia was significantly increased with quadratic polynomial expression and the highest theoretical output was 327.9kg / 667m2 The optimal ratio of fertilizer to good yield was N:P:K = 1.54:1.00:1.16, and the best density was 2494 plants / 667m 2.