75%嗪草酮水分散粒剂对夏大豆田阔叶草的防除效果及其安全性  

Control Effect of Metribuzin 75%WG on Broad-Leaved Weeds in Summer Soybean Fields and Its Selectivity

作　　者：祁志尊[1] 申贝贝 刘朝芳[1] 黄冀南 刘小民[1] 郭鑫丽 张双应 梅凤月 王建平[1] QI Zhi-zun;SHEN Bei-bei;LIU Chao-fang;HUANG Ji-nan;LIU Xiao-min;GUO Xin-li;ZHANG Shuang-ying;MEI Feng-yue;WANG Jian-ping(Key Laboratory of Crop Cultivation Physiology and Green Production of Hebei Province/Institute of Cereal and Oil Crops,Hebei Academy of Agriculture and Forestry Sciences,Shijiazhuang 050035,China;Qiaochang Agriculture Group Co.,Ltd.,Binzhou 256600,China)

机构地区：[1]河北省作物栽培生理与绿色生产重点实验室/河北省农林科学院粮油作物研究所,河北石家庄050035 [2]侨昌现代农业有限公司,山东滨州256600

出　　处：《杂草学报》2023年第3期69-74,共6页Journal of Weed Science

基　　金：河北省农林科学院基本科研业务费项目(编号:2021060204);河北省农林科学院现代农业科技创新工程课题(编号:2022KJCXZX-LYS-13)。

摘　　要：采用田间小区试验法研75%嗪草酮水分散粒剂对大豆田阔叶草的除草效果及安全性。结果表明,在夏大豆播后苗前喷施土壤处理75%嗪草酮水分散粒剂506.26、562.50、618.75 g/hm^(2),对杂草的鲜重总防效分别为89.2%、93.3%、94.7%,对马齿苋的鲜重防效分别为89.1%、91.3%、95.0%,对反枝苋的鲜重防效分别为98.1%、98.9%、95.4%,处理间差异均不显著;对酸浆的鲜重防效分别为46.4%、80.6%、88.6%,562.50 g/hm^(2)与618.75 g/hm^(2)处理间差异不显著,均与506.26 g/hm^(2)处理差异显著。75%嗪草酮水分散粒剂处理后,夏大豆出苗正常,苗后表现出轻微的药害症状,测产结果显示,各剂量处理与人工除草处理差异不显著,但显著高于空白对照。75%嗪草酮水分散粒剂在夏大豆田中的推荐使用剂量为562.50~618.75 g/hm^(2),该剂量下药后45 d对阔叶草的鲜重防效为93.3%~94.7%,且对夏大豆安全。A field plot experiment was conducted to study control effect of metribuzin 75%WG on broad-leaved weeds in summer soybean fields and its selectivity.The results showed that total fresh weight control effects of metribuzin 75%WG at 506.26,562.50,618.75 g/hm^(2) on broad-leaved weeds were 89.2%,93.3%,94.7%,their fresh weight control effects on Portulaca oleracea were 89.1%,91.3%,95.0%,and fresh weight control effects on Amaranthus retroflexus were 98.1%,98.9%,95.4%,when three doses of metribuzin were applied at pre-emergence stage.Meanwhile,there were not significant differences between metribuzin treatments.The fresh weight control effects on Physalis alkekengi L.were 46.4%,80.6%,88.6%,separately.And it had no significant differences between the treatments of 562.50 g/hm^(2) and 618.75 g/hm^(2).Both these two treatments had significant difference with the treatment of 506.25 g/hm^(2).After the application of metribuzin,the summer soybean normally emerged,presented slight phytotoxicity symptoms.The effect of metribuzin weeding on summer soybean yield was not significantly different from that of artificial weeding,but it was significantly better than that of blank control.In general,the recommended dose of metribuzin in summer soybean fields was at 562.50-618.75 g/hm^(2) with fresh weight control effect on broad-leaved weeds was 93.3%-94.7%,and it was selectivity to summer soybean.

关 键 词：嗪草酮 夏大豆 阔叶草 除草效果 安全性 

分 类 号：S451[农业科学—植物保护]