不同稻田状态下克无踪快速灭茬控草试验  

Technique of Weed-Control and Quick Clear-Stubble by Spraying Herbicide Paraquat in Different States of Paddy Field

作　　者：唐启源[1] 黄见良[1] 邹应斌[1] 龚庆微 石纪成[3] 欧高才[4] 郭兆武[5] 

机构地区：[1]湖南农业大学植物科学技术学院,湖南长沙410128 [2]湖南农科院植物保护研究所,湖南长沙410125 [3]宁乡县农业技术推广中心,湖南宁乡410600 [4]湖南省植保植检站,湖南长沙410005 [5]长沙电力学院环境工程及生物技术研究所,湖南长沙410077

出　　处：《湖南农业大学学报（自然科学版）》2002年第3期199-201,共3页Journal of Hunan Agricultural University(Natural Sciences)

基　　金：湖南省科技厅重点项目 (99NKY10 0 4 0 7);捷利康公司资助项目

摘　　要：为探明不同稻田状态下克无踪快速除草灭茬的效果 ,2 0 0 0年在湖南宁乡进行了克无踪用药量、对水量、施药时天气、增效剂、前作留茬高度等对除草剂清茬的效果试验 .结果表明 :克无踪有效用量为 3.75L/hm2 左右 ,视杂草基数适当增减 ;对水量对灭草和灭稻茬的效果有较大的影响 ;二甲四氯、乙草胺、碳铵 +氯化钾可不同程度地提高克无踪的控草效果 ;留茬高度不同主要影响稻茬的再生蔸率和再生株数 .推荐克无踪施用量 ,早稻冬泡田为3.0 0～ 3.75L/hm2 ,早稻冬干田 3.75～ 4.5 0L/hm2 ,晚稻免耕田为 3.75L/hm2 ,同时加入碳酸氢铵 45kg/hm2 和乙草胺 45 0mL/hm2 为增效剂 ,对水 90 0kg/hm2 于傍晚或清晨喷施 .晚稻免耕清茬时 ,前茬留茬高度不超过 4cm .杂草枯黄以后应及时灌水淹没杂草或稻茬 ,以有效控制杂草或稻茬再生 .To ascertain the effects of paraquat on quick clearing weeds and stubble in different states of paddy field,the experiments of the chemical amount, water adding, weather, synergist and stubble height were conducted in Ninxiang county,Hunan province in 2000. The results show that the effective amount of paraquat is about 3.75 L /hm 2.The water adding has great influence on weed and stubble control. Agroxone, acetochlor,ammonium bicarbonate and potassium chloride can enhance the effects of paraquat at different degrees. Stubble heights affect the hill ratio and plant numbers of ratooning. It is recommended that the application amount of paraquat is 3.00～3.75 L/hm 2 in winter-socked field ,3.75～4.50 L/hm 2 in winter-dry field in early rice, and 3.75 L/hm 2 in no-tilled field in late rice with 45 kg/hm 2 ammonium bicarbonate and 450 mL/hm 2 acetochlor as synergist and 900 kg/hm 2 water.The spray should be conducted at duskor early morning. Meanwhile the stubble height should not be higher than 4 cm. After weeds get withered,it is necessary to flood the weeds and stubbles to prevent then from regenerating.

关 键 词：稻田 灭茬控草 免耕 克无踪 

分 类 号：S511.053[农业科学—作物学]