6种除草剂对豫南稻区直播再生稻头季稻田中杂草的防效及安全性评价  

Effect of Six Herbicides on Weeds in The First Season Rice in Direct Seeding Ratoon Rice Fields of Southern Henan and Their Selectivity Evaluation

作　　者：赵海英 刘祥臣 丰大清 余贵龙 张强 谷孟轩 邹俊 吕未 史厚东 孙全东 吴长好 ZHAO Hai-ying;LIU Xiang-chen;FENG Da-qing;YU Gui-long;ZHANG Qiang;Gu Meng-xuan;ZOU Jun;LYU Wei;SHI Hou-dong;SUN Quan-dong;WU Chang-hao(Xinyang City Academy of Agricultural Sciences,Xinyang 464000,China;Henan University of Urban Construction,Pingdingshan 467036,China;Xinyang Agricultural and Rural Bureau,Xinyang 464000,China;Xixian Agricultural and Rural Bureau,Xixian 464300,China)

机构地区：[1]信阳市农业科学院,河南信阳464000 [2]河南城建学院,河南平顶山467306 [3]河南省信阳市农业农村局,河南信阳464000 [4]河南省息县农业农村局,河南息县464300

出　　处：《杂草学报》2023年第2期35-40,共6页Journal of Weed Science

基　　金：河南省农业产业技术体系建设专项资金(编号:Z2012-04-01)。

摘　　要：通过田间试验,验证了6种除草剂对豫南稻区直播再生稻田的除草效果及水稻安全性。结果表明:药后14 d,40%草·丁草胺EC 1875 mL/hm^(2)、39%甲戊·草酮SC 1800 mL/hm^(2)、12%二甲戊灵EC+48%丁草胺EC 1500 mL/hm^(2)对田中多数杂草均有较好的株防效。药后21 d,40%草·丁草胺EC 1875 mL/hm^(2)对稗、莎草科杂草以及部分阔叶杂草的株防效均达91.75%~100.00%;39%甲戊·草酮SC 1800 mL/hm^(2)对莎草科杂草的株防效为75.00%,对其他杂草的株防效均在80.24%~100.00%;12%二甲戊灵EC+48%丁草胺EC 1500 mL/hm^(2)对稗、阔叶杂草的株防效均达100.00%,对莎草科杂草的株防效在67.00%~83.25%之间。以上3个处理鲜重防效均高于其他处理,且三者间差异不显著;实际产量分别比对照提高13.21%、10.12%、14.52%;以上3个处理分别比对照增收2752.8、2108.0、3025.6元/hm^(2)。综上,生产上建议推荐使用以上3种药剂对直播再生稻田进行封闭处理,22 d后再用茎叶处理进行防除,可达较好的除草效果。Through field experiments,we verified effect of six herbicides on weeding and selectivity to direct seeding ratoon rice.The results showed that butachlor·oxadiazon 40%EC with 1875 mL/hm^(2),accotab·oxadiazon 39%SC with 1800 mL/hm^(2)and pendimethalin 12%EC+butachlor 48%EC with 1500 mL/hm^(2)presented excellent plant control effect in the field after 14 days.After 21 days,the plant control effect of butachlor·oxadiazon EC 40%with 1875 mL/hm^(2)was 91.75%~100.00%on Echinochloa crusgalli,Cyperaceae weeds and some broad-leaved weeds.Meanwhile,the plant control effect of accotab·oxadiazon 39%SC 1800 mL/hm^(2)on Cyperaceae weeds reached 75%,but that on other weeds was 80.24%-100.00%.The plant control effect of pendimethalin 12%EC+butachlor 48%EC with 1500 mL/hm^(2)on E.crusgalli and broad-leaved weeds reached 100.00%,and that on Cyperaceae weeds ranged from 67.00%to 83.25%.The fresh weight control effects of the above three treatments were all higher than the other treatments,and the difference among the three was not significant.Compared with the control,the actual yield of the above three treatments increased by 13.21%,10.12%and 14.52%,respectively,while their value of output increased by 2752.8,2108.0,3025.6 yuan/hm^(2).Therefor,the above three herbicides are recommended as pre-emergence herbicides in direct seeding ratoon rice fields.After 22 days,the pro-emergence herbicides were used to achieve better weeding effect.

关 键 词：豫南稻区 直播再生稻 除草剂 除草效果 安全性评价 

分 类 号：S451.2[农业科学—植物保护]