旱地豌豆农艺措施数学模型的研究

STUDY ON MATHEMATICAL MODEL OF AGRONOMIC PRACTICES FOR PEA IN NONIRRIGATED FORMLAND

本试验以河北坝上地区豌豆主栽品种前进一号为材料,选择氮肥(X_1)、磷肥(X_2)、密度(X_3)三因素为决策变量,产量为目标函数,采用“311—A”最优设计,通过对结果进行统计分析得回归方程为: 在设计水平范围内,进行数学模型解析得到各因素对产量的作用顺序为磷肥最大,氮肥次之,密度最小。高产稳产优化方案的农艺措施为亩施碰铵7.1～10.5公斤,亩施过磷酸钙32.5～38.8公斤,密度4.0～4.5万株/亩。

Using the popular pea variety Forward NO. 1 as material, selecting the thre e elements nitrogen fertilizer x_1, phosphate fertilizer X_2, density X_3 as dec ision variables, yield yas target function, adopting'311—A'optimization dasign,we conducted this study in Bashang, Hebei Prouince. The statistics analysis of the study showed the regressional equation as follow: y=88.43-1.25x_1+6.68x_2+1.91x_3-3.15x_1x_2- 1.42x_1x_3-3.04x_2x_3-3.37x_1~2-3.76-x_2~2+2.09x_3~2The methmaticl modl analysis of the three elements within the design leowl slope showed that the action order as fouow: phosphate fertilizer X_2 as the first one,nitrogen fertilizer X_1 as the second one, density X_3 as the last one. The agtier ltvral practices for high and stable yields are as follow:sthe amount of NH_4. Hco_37.1～10.5kglmn,Calcinm snperphosphate 32.5～38.8kg/mn,ctensity40000～45000。