寒旱雨养生态区油菜高产高效栽培数学模型研究

Mathematical model of the high yield and benefit of rape planting in cold-arid ecological area

采用二次回归正交试验方法研究了种植密度、氮磷肥用量和配比对寒旱雨养生态区油菜产量、效益及主要农艺性状的影响,并建立其数学模型.根据模型及多年多点生产实践筛选寻优求得666.7 m2产量高于250 kg,纯收益大于150元的最佳农艺组合措施为:密度2.84～3.25万株,纯N 0.82～6.6 kg, P2O5 8.90～9.16 kg, N:P2O5约为1:2.4.

In article, the author states the effect, which was brought by the planting density, quantity and proportion of nitrogenous and phosphate fertilizer, to the spring rape＇s yield, benefit and main farming characters in cold, arid area. Meanwhile it builds up mathematical model. According to the model and texts in various area for years, we find the highest yield is 250 kg in 666.7 m^2.net profit is over 150 yuan and the best way of farming technical＇combination is： density 28 400-32 500 plant/666.7m^2, pure N 0.82-6.6 kg/666.7m^2, P2O5 8.90-9.16 kg/666.7m^2, N： P2O5≈1 ： 2.4.