灌溉小麦优质高产生态栽培优化数学模型研究

Study on Selective Mathematic Model for High-yield and Good Quality Ecological Cultivation of Wheat in Irrigation Region

运用农业系统工程原理 ,采用三因子二次饱和D最优设计方案[8] ,选取对小麦产量影响较大的播期x1 、播量x2 和施肥量x3 为调控因子[5,7] ,以每公顷产量y为目标函数研究灌溉小麦优质高产生态栽培优化数学模型。结果表明 ,在试验设计条件下 ,影响灌溉小麦产量的各生态因素权重依次为播期x1 >播量x2 >施肥量x3 ,依据建立的模型 ,目标产量在 75 0 0～ 90 0 0kg hm2 时 ,灌溉小麦优质高产最佳农艺方案为 :播期x1 1 0月 2～ 5日 ,播量x2 1 4 5 91～ 2 1 1 76万粒 hm2 ,施肥量x3 纯N、P (N∶P2 O5=1∶1 ) 1 91 83～ 30 4 73kg hm2 。本研究为灌溉小麦优质高产生态栽培提供科学依据。

The study was carried out by using the principle of agricultural systems engineering and the qualified design of three factor square saturated D,in which the factors of sowing date (x 1 ),sowing quantity (x 2 ),amount of fertilizer application (x 3 ) were taken as the adjusting factors,and the yield (y) of each hm 2 ,as target function,Though the study we got a mathematic model for high-yield and good-quality ecological cultivation of wheat in irrigation region The result indicated that,under the condition of this experiment design,factors affecting wheat yield in irrigation region were in order as sowing date x 1 >sowing quantity x 2 >amount of fertilizer application x 3 when the target yield was from 7500～9000 kg/hm 2 ,the optimum formula of wheat high-yield and good quality in irrigation region was as follows: sowing date x 1 from 2nd to 5th October,sowing quantity x 2 of 145 91～211 76×10 4 seed/hm 2 ,fertilizer application x 3 of pure N、P(N∶P 2 O 5 =1∶1)191 83～304 73 kg/hm 2 。This study provides a scientific foundation for high-yield and good quality ecological cultivation of wheat in irrigation region