【摘要】 对千金子在直播稻田的发生高峰及叶片生长速度进行了观察 ,并对化学除草及水控除草的效果作了研究。结果表明 ,千金子在直播田只有一个发生高峰期 ,单季晚稻直播田和连作晚稻直播田发生高峰期在播后 1周 ,早稻直播田发生高峰期在播后 2周。千金子的叶片生长速度较水稻秧苗快 1叶左右 ,其生长量前期较小 ,后期较大。扫特、千金、威霸、去稗安和拜田净对千金子防除效果均达 92 .2 %以上 ,适宜的水管理也可以有效防除千金子更多还原

【Abstract】 Germination and growth of Chinese sprangletop, Leptochloa chinensis (L.) Nees,were observed in fields of direct seeded rice,and effect of herbicides and water management on the weed assesed.It showed that Chinese sprangletop germinates to have an emergence peak at 1 week after rice seeded in one season late rice and two season late rice or 2 weeks in early rice.The weed grows quicklier than rice by about 1 leaf,and the weed plant is much bigger at late stage than at early stage.While Sofit (pretilachlor+fenclorim),Clincher (Clincher,cyhalofop),Whip (Whip,fenoxaprop p ethyl),MY 100 (oxaziclomefone) and YRC 2388 (fentrazamide) are highly effective on the weed.Water management may also control it.更多还原