除草剂药后不同间隔时间移栽对稻茬免耕油菜生长发育的影响

摘要

The rape seedlings were transplanted in the no-tillage rice field sprayed with 41% glyphosate isopropylammonium or 200g/L paraquat to study the effects of herbicides on growth of rape and to provide the scientific basis for rational application of herbicides in rape no-tillage transplanting cultivation. The results showed that spraying 41% glyphosate isopropylammonium in no-tillage rice field damaged to growth of the transplanted rape seedlings within four days, especially l~2d after spraying and the optimum transplanting time should be the fifth day after spraying. The rape seedlings could be transplanted in the no-tillage rice field sprayed with 200 g/L paraquat in the same day, but the optimum transplanting time was the second day after spraying.%为稻茬免耕移栽油菜田科学使用除草剂提供依据,采用41%草甘膦异丙铵盐与200 g/L百草枯水剂对稻茬免耕油菜进行了田间试验,研究了其对稻茬免耕油菜生长发育的影响.结果表明,41%草甘膦异丙胺盐水剂在施药当天、药后1～4 d移栽,油菜苗均出现药害症状,特别是施药当天及药后1～2 d移栽油菜苗药害最重,应间隔5 d后移栽药害较轻;200 g/L百草枯水剂可以在施药当天移栽油菜苗,但最好在药后第2天移栽油菜最为安全.