配施肥和合理密植对西葫芦制种产量的影响

为给西葫芦制种高产提供科学依据,采用二次回归正交旋转组合设置4个因素5个水平试验,研究了配施氮磷钾肥和合理密植对西葫芦制种产量及因素间互作的影响。结果表明:4项措施不同量综合作用对西葫芦产量影响显著,单因素措施量分别与西葫芦制种产量呈一元二次抛物线关系,氮肥、磷肥和氮肥、密度相互作用对西葫芦制种产量影响均达到显著水平,即互作涉及的两个因素之一的增产效应在另一个因素不同水平间有显著的差异。综合分析表明:本试验条件下,4个因素综合作用经济效益以氮肥量223~249 kg/hm~2,磷肥量152~174 kg/hm~2,钾肥量164~168 kg/hm~2,种植密度量39391~40456株/hm~2时最佳。

Effect of Combined Fertilization and Rational Close Planting on Seed Yield of Pumpkin

To provide production basis for high yield of pumpkin seeds, the authors used quadratic regression orthogonal rotary combination to set tests of four factors and five levels, and studied the effects of NPK combined fertilization and rational close planting on seed yield of pumpkin. The results showed that different amounts of four measures had comprehensive and significant effect on pumpkin yield, single factor measure and seed yield presented an unitary quadratic parabola relationship, the interaction effect of nitrogen, phosphate, nitrogen, and density on seed yield of pumpkin reached significant level, namely, the yieldimproving effect of one of the two factors and the other factor had significant differences between different levels. Comprehensive analysis showed that: under this experimental condition, the best treatment was nitrogen fertilizer of 223-249 kg/hm2, phosphate fertilizer of 152-174 kg/hm2, potash fertilizer of 164-168 kg/hm2 and planting density of 39391-40456 strain /hm2.