裴德明 李民 刘元兵



摘要 为了明确31%丙草胺·丙炔噁草酮水乳剂对水稻移栽田一年生杂草的防除效果、最佳使用剂量和对水稻秧苗的安全性,开展了田间药效试验。结果表明,用31%丙草胺·丙炔噁草酮水乳剂1 350~2 400 mL/hm2拌土(沙)300 kg/hm2均匀撒施后田间保持3~5 cm水层5~7 d,7 d后移栽水稻,施药后45 d对水稻移栽田一年生杂草总草的株防效及鲜重防效分别为92.88%~95.20%、94.02%~96.50%,防除效果较好,且对水稻秧苗生长安全。
关键词 31%丙草胺·丙炔噁草酮水乳剂;一年生杂草;株防效;鲜重防效
中图分类号 S451.21;S481+.9 文献标识码 A
文章编号 1007-5739(2020)13-0084-02 开放科学(资源服务)标识码(OSID)
Abstract In order to determine the control effect and the optimal dosage of 31% pretilachlor·oxadiargyl EW on annual weeds in rice transplanting fields and the safety of rice seedlings, the field efficacy test was carried out. The results showed that the transplanting fields was treated with the mixture of 31% pretilachlor·oxadiargyl EW 1 350-2 400 mL/hm2 and soil (sand) 300 kg/hm2, keeping 3-5 cm water layer for 5-7 d, then rice was transplanting. After 45 d of the treatment, the plant control effect and fresh weight control effect of the total annual weeds in the rice transplanting field were 92.88%-95.20% and 94.02%-96.50%, respectively. The control effect was better and the growth of rice seedlings was safe.
Key words 31% pretilachlor·oxadiargyl EW; annual weed; plant control effect; fresh weight control effect
为明确31%丙草胺·丙炔噁草酮水乳剂对水稻移栽田一年生杂草的防除效果、最佳使用剂量和对水稻秧苗的安全性,本文开展了该药剂防治水稻移栽田一年生杂草的田间药效试验,以期为指导农户科学用药和农药减量增效提供有力支撑。
1 材料与方法
1.1 试验地概况
试验田设在肥西县上派镇中派村,该试验田为圩田,前茬为小麦,土壤类型为水稻土下属黄白土,肥力中上等,有机质含量20.6 g/kg,pH值6.5,地势平坦,排灌方便。
1.2 试验材料
供试作物为本地常种水稻品种Ⅱ优187。供试药剂为31%丙草胺·丙炔噁草酮水乳剂(广东佛山市盈辉作物科学有限公司提供),30%丙草胺乳油(安徽丰乐农化有限责任公司生产,市售自购),80%丙炔噁草酮(稻思达)可湿性粉剂(拜耳(德国)作物科学公司,市售自购)。试验对象为田间主要杂草,即稗草、陌上菜、异型莎草、千金子等一年生杂草。
1.3 试验设计
试验共设……