机直播水稻“播喷同步”机械除草新技术在安徽单季稻生产中的应用

Application of a new weed mechanical control technology of"synchronous seeding and spraying"for direct seeding rice in the single season rice production in Anhui

为解决机直播田草害难除问题,在安徽省宣城地区进行了机直播水稻“播喷同步”机械化除草试验。结果表明:300g/L丙草胺(450 g a.i./hm^2)+10%苄嘧磺隆(30 g a.i./hm^2)和30%丙草胺(585 g a.i./hm^2)+10%苄嘧磺隆(30 g a.i./hm^2)处理均对水稻生长安全;机械施药26d后,对田间稗草(Echinochloa crus-galli)、千金子(Leptochloa chinensis)、碎米莎草(Cyperus iria)和节节菜(Rotala indica)、陌上菜(Lindernia procumbens)、鸭舌草(Monochoria vaginalis)等阔叶草的植株密度防效均在93%以上,水稻产量在9000kg/hm^2以上。试验表明,300g/L丙草胺+10%苄嘧磺隆和30%丙草胺+10%苄嘧磺隆均可以在机直播水稻“播喷同步”机械除草技术中使用。

In order to solve the weed problems in direct seeding field,a new weed mechanical control technology of"synchronous seeding and spraying"for direct seeding rice was applied in Xuancheng,Anhui Province.The results showed that the treatments of 300 g/L pretilachlor(450 g a.i./hm^2)+10%bensulfuron methyl(30 g a.i./hm2)and 30%pretilachlor(585 g a.i./hm^2)+10%bensulfuron methyl(30 g a.i./hm2)were safe for rice growth,and the plant density control effects of Echinochloa crus-galli,Leptochloa chinensis,Cyperus iria and broadleaf weed(Rotala indica,Lindernia procumbens,Monochoria vaginalis)were all over 93%after 26 days of mechanical application.The rice yields of the 2 treatments were above 9000 kg/hm^2.It showed that 300 g/L pretilachlor+10%bensulfuron methyl and 30%pretilachlor+10%bensulfuron methyl could be used in the"seeding and spraying synchronization"weed mechanical control technology of direct seeding rice.