【摘要】 采用二次饱和D-最优设计建立了密度和N肥用量与夏直播花生产量的数学模型。进一步分析表明,密度与N肥用量呈负交互效应,肥料用量增加,花生密度可适当减少。密度与N肥用量的最优组合为每公顷播15.36万穴,施纯N99.6kg,最高产量可达到5527.0kg。公顷产量在4500～5527kg范围内的措施组合为:每公顷播15.0～18.7万穴,施纯N65.1～124.4kg。更多还原

【Abstract】 A mathematical model between peanut yield, plant density and N rate was set up with the quadratic saturation D-optimization design. Conclusions can be made from the model: 1) There was a negative interaction between plant density and N rate. The optimum plant density can be decreased as the increase of N rate; 2) The maximum yield based on this experiment can reach to 5527.0 kg/ha and the corresponding combination of N rate and plant density were 99.6 kg/ha and 153600 holls/ha,respectively. The optimum disposition of N rate and plant density for yields of 4500～5527 kg/ha were 65.1～124.4 kg/ha and 150000～187100 holls/ha, respectively.更多还原