“燕麦枯”麦田优化施用技术研究

本研究采用二次通用旋转组合设计的方法,建立了以小麦产量和野燕麦防除率(％)为目标函数,考虑“燕麦枯”药剂施药量(公斤/公顷),喷液量(公斤/公顷)和施药时期(月/日)三个决策变量的数学模型。通过对模型的综合分析寻优提出:在麦田野燕麦危害严重地区(减产30％以上),“燕麦枯”施药量为8.25——10.05公斤/公顷,喷液量为450——675公斤/公顷,施药时期为12月/10日或翌年3月/10日前后的优化技术方案。运用此“燕麦枯”麦田施用技术,可获小麦每公顷产量4050公斤以上和野燕麦防除率75％以上。

Study on the optimal Application Technique of Difenzoquat in Wheat

the regression method of orthogonal conic substitution with 3 factors was used in this study. The amount of difenzoquat applied (kg/ha), the amount of chemical liquid spribkled(kg/ha) and the date of application (month/day) were tested to establish the mathematical model with two objective functions of the wheat yield and the wild oat control percentage. According to the comprehensive analysis of the model, it was suggested that in theareas infected seriously by the wild oat (more than 30% yield reduction),the amount of chemical liquid sprindled 450-675kg/ha,the amount of defenzoquat applied was 8,25-10, 05kg/ha,the date of application Dec. 10or Mar. 10 the next year. The Wheat Yield of 4050 kg/ha and more than 75% of the wild oat control could be obtained through applying the optimal control technique.