小麦高产栽培农艺组合措施选优

Optimum Selection of High Yield Culture Agronomy Practices Combination Technic Measures in Wheat Production

本文采用四因素五水平二次旋转回归试验设计测得的参数,建立了以产量为目标的数学模型,通过模拟仿真和频率分析,优选出亩产大于460公斤的农艺组合措施决策方案为:亩施底氮8.49—10.26公斤,底磷(P_2O_5)7.31—9.31公斤,追纯氮1.9—4.03公斤,播量8.39—9.46公斤,其经济最佳投入量为亩施底氮9.25公斤,底磷(P_2O_5)6.92公斤,不追氮,亩播8.81公斤,较频率分析决策方案亩纯增益5.39元。

According to the parameter obtained through guadratic regsresion on the basis of 'four factors' and 'five levels' , the function mathematic model has been established to determine wheat's output. Through the simulation and sieving,and frequency analyses by computer, the agronomic plan for yielding inore than 450kg per mu has been optimally selected, which indudes 8-39-9-46kg seeds per mu, base dressing 8.46-10.26kg pure nitrogen, 7.31-9.31kg P2O5 per mu , topdressing 7.9-4.03kg pure nitrogen per mu.lts optimum economical quantity put into as follow: base' dressing 9-25kg pure nitrogen, 6.92kg P2O5 per mu, no topdressing nitrogen, and 8.81kg seeds. Per mu receipts increased 5-39 yuan compared with another frequency analyses plan.