夏直播绿豆规范化栽培密度与氮肥优化配置研究

Optimized Allocation Research on Standardized Planting Density and Nitrogen Fertilizer of Summer-Sowing Mung Bean

应用二次饱和D—最优设计,研究了施氮量和种植密度对绿豆的产量效应,建立了施氮量和密度与夏直播绿豆产量的数学模型。分析结果表明,密度效应大于施氮量效应,二者呈负向交互作用,密度增加,施氮量可适当减少。施氮量与密度的最优组合为:每公顷施氮53.73 kg,密度14.17万株,绿豆最高产量可达到1 664.45 kg/hm^2。产量≥1 600 kg/hm^2的措施组合为:每公顷施氮47.96~59.54 kg,种植密度(13.45~14.88)万株。

Using the quadratic saturation D - optimum design, the yield effects of N application rate and planting density on summer -sowing mung bean were studied, and corresponding mathematical models were developed. The results showed that the density effect was greater than the N fertilizer effect, and they had negative interaction. The N fertilizer could be appropriately reduced through increasing density. The maximum yield of mung bean could be up to 1 664.45 kg/hm2 under the optimal combination of N fertilizer （53.73 kg/hm2） and density （ 141 700 plants/hm2 ）. The combinations of yield exceeding 1 600 kg/hm2 were N fertilizer of 47.96 - 59.54 kg/hm2 and density of 134 500 - 148 800 plants/hm2.