少免耕小麦高产栽培综合农艺措施的组合优选应用研究

Study on Optimization for Agrotechnique Combination on High Yield Wheat Cultivation under Minimum Tillage

根据农业系统工程的最佳模拟理论,运用二次同归正交旋转组合设计和计算机模拟选优方法,选择播期、基本苗、氮、磷、锌肥用量及氮肥用作基肥、壮蘖肥、返青肥、拔节肥、倒2叶肥等对小麦生长发育影响较大的可控因子作为决策变量,以产量及其它农艺性状作为目标函数组成试验计划,取得可靠的田间试验数据后,直接输入计算机。建立多项农艺措施对产量等性状的多维反应面数学模型,依据此模型,在计算机上进行模拟选优,完成3000多个组合方案的动态仿真和统计分析,筛选出一套小麦亩产400-500kg和大于500kg的优化农艺技术组合方案及群体发育指标、产量结构指标。同时还探讨了因素独立、互作效应。

The best agrotechnique combination and conlong growth index and yield formation index for 400-500kg/mu and more than 500kg/mu yield each winter wheat were sifted out from more than 3000 modelling designs on computer,by means of a polynomial mathematics, which was set upon field expriments that took sowing time, basic seedling, vrious quantities of N, P, Zn fertilizer and nitrogen apply in various grouing periods of wheat as factors and the crop yield as a function. The independant factors and their mutual effects were also discussed in this paper.