玉米田苗后除草剂二氯喹啉酸和苯达松混用效应及配方控制研究

Study on Joint Action and Prescription Adjustment of Postemergence Herbicides Quinclorac and Bentazon Mixture in Corn Field

采用二因素五水平二次正交旋转组合设计,通过田间试验,以杂草防效和玉米产量为目标函数,对二氯喹啉酸、苯达松的二元混用效应及玉米田施用的最佳配方进行了初步探讨。结果表明,二氯喹啉酸、苯达松混用具有显著增效作用;玉米田施用的最佳配方为:二氯喹啉酸(903g ai hm-2)+苯达松(918 15g ai hm-2);最佳配方范围为:二氯喹啉酸(723～1031g ai hm-2)+苯达松(758～888g ai hm-2)。

Field trial was conducted. Using methods of rotational regression design and making control efficacy and yield of corn as goal function, we studied joint action and prescription adjustment of the herbicide mixture. The result showed that there was synergism between quinclorac and bentazon. It was concluded that the best dosage of above two herbicides was quinclorac(903gaiha-2),bentazon(918.15gaiha-2),and the best ranges were quinclorac(723～1031gaiha-2)plus bentazon (758～888gaiha-2).