苜蓿—玉米草粮兼顾型种植模式田间杂草调查及除草剂筛选

摘要

In order to explore the regularity of weeds occurred in the alfalfa and corn intercropping field,and screen herbicides,the species and quantity of weeds in alfalfa and corn intercropping field were investigated,and the weed control effects of four herbicides on alfalfa and corn intercropping field were researched.The results showed that the relative abundance of main weeds in the corn intercropping field were higher than that of corn monoculture,but the relative abundance of main weeds in alfalfa intercropping field were lower than that of alfalfa monoculture.The control effect of metolachlor was the best in the four herbicides.%为了探究苜蓿玉米间作田杂草的发生规律,并筛选出适合的除草剂,对苜蓿玉米间作田杂草的种类和数量进行了调查,并研究了4种除草剂对苜蓿玉米间作田杂草的防除效果.结果表明:几种主要杂草在间作玉米田中的相对多度要高于单作玉米田,在间作苜蓿田中的相对多度要低于单作苜蓿田.4种除草剂中异丙甲草胺的防效高达91.6％,效果最好,产量最高.