萧山区位于钱塘江南岸,常年晚稻种植面积在2郾7万hm2左右,且95%以上为单季晚稻,其中单季直播晚稻达2万hm2左右。直播稻高产的主要障碍因子之一是杂草,故萧山历来把直播稻的除草作为主要栽培技术来抓。2004年6月23日,区农业局相继接到一些镇关于直播晚稻田因使用除草剂60%丁草胺 Xiaoshan District is located on the southern bank of Qiantang River. The perennial rice planting area is about 2 郾 70,000 hm2, and more than 95% is single-season late rice, of which about 200,000 hm2 are direct-seeding late-season rice. One of the main obstacles to the high yield of direct seeding rice is weeds. Therefore, Xiaoshan has always regarded the direct seeding of weeds as the main cultivation technique. June 23, 2004, the District Bureau of Agriculture have received a number of towns on the direct broadcast late rice due to the use of herbicides 60% Butachlor