不同除草剂对稻田杂草的防效及水稻生长和产量的影响

Influence on Weeds Control,Rice Growth and Yielding of Different Herbicides

[目的]筛选水稻田杂草千金子、稗草的有效药剂。[方法]通过小区试验研究了惠茎1号、惠茎2号和五氟磺草胺等除草剂对水稻田千金子、稗草的防治效果。[结果]在千金子防治上,各处理最终效果均达100%。对于稗草防治,陶氏益农生产的17%稻喜1.2 kg/hm^2的除草效果最好,产量也比对照药剂增加2.58%,其次是惠茎1号1.2 kg/hm^2,产量比对照药剂增加1.80%,江苏华农生物化学有限公司生产的氰氟嘧啶肟1.2 kg/hm^2,产量比对照药剂增加1.06%。该3种药剂处理下的水稻苗数较对照略有增加,后期株高无差异,安全性好。[结论]该研究结果为水稻田稗草和千金子的防治提供了理论依据。

[Objective]The aim was to screen out effective herbicides for Echinochloa crusgalli(L.)Beauv.and Leptochloa chinensis(L.)Nees.in rice field.[Method]We studied the control effect of some herbicides like Huijing1,Huijing2and Penoxsulam against Echinochloa crusgalli(L.)Beauv.and Leptochloa chinensis(L.)Nees.in rice field through plot test.[Result]For the Leptochloa chinensis(L.)Nees.,every herbicide showed the same effect,up to100%.But for the Echinochloa crusgalli(L.)Beauv.,their control effects were different.17%Daoxi from Dow with1.2kg/hm2application amount obtained the best control effect,which raised the yielding up to2.58%.Next was Huijing1,with1.2kg/hm2application amount,and the yield of rice was increased by1.8%.The third was Cyanouracil oxime,from Jiangsu Huanong biochemistry Co.,Ltd.,application amount was1.2kg/hm2,which increased the yielding up to1.06%.For the rice growth,under the treatment of the above three herbicides,the seedling number was increased,and had no difference in height,as well as the high safety,compared with the other herbicides.[Conclusion]The results provide theoretical basis for control of Echinochloa crusgalli(L.)Beauv.and Leptochloa chinensis(L.)Nees.in rice field.