北京地区晚播小麦高产、高效益综合农艺要素优化的初步研究

A Preliminary Study on the Optimization of the Key Agronomical Measures for High Yield and Profit of Winter WheatSown Later Than Due Time in Bejing

本文通过5因素2次旋转组合设计(1/2)实施,选择施氮量(X1)、基本苗(X2)、春季灌水次数(X3)、施磷量(X4)、春季施氮叶龄(X5) 为决策变量,以小麦产量(Y)、利润(P)为目标函数,建立10月5日和10月18日两个播期的数学模型以及大于450kg及利润为150～200元的优化组合方案。

In the experiment, the conducted design of orthogonal rotating regression is used for its conduction, five factors such as the amount of net N applied (X1), seeding density (X2), irrigation frequeney in spring (X3). the amount of P applied (X4) and The leaf number by nitrogen applying (X5) are selected as the decisive variables for the design, and the wheat yield, and the wheat yield and profit are chosen as this design 's target functions.From the ressults of the experimen't, two mathmatical models based on the seed-sown date of oct.5th and oct. 18th respectively have been established, and the optimum scheme of agronomic measures for both a wheat yield of 450kg/mu and a profit of 150～200 Yuans / mu has been made.