不同除草剂对免耕抛秧水稻经济性状和产量影响试验

An impact experiment of different weedicides applying in rice with No-tillage and seedling-broadcasting(NTSB)on economic features and yield

再生稻苗、落粒谷苗、杂草是影响水稻免耕抛秧技术推广的瓶颈。采用农民乐、草甘膦、克无踪等3种除草剂进行2年4造田间试验,结果表明,农民乐和草甘膦药效均较稳定,除草灭茬较彻底,比常耕增产4.3%～12.5%,每667m2增收节支78～120元,增收百分率达16.4%～24.7%,适合当地推广应用。克无踪在同等条件下使用,除草灭茬效果不理想,不宜在免耕田上单独使用。

Regeneration seedlings, drop-grain seedlings and weeds are important bottle-necks impacting extension of rice NTSB technology. To apply three weedicides such as ＂Farmer joy＂ etc. in four seasons growth for two years, the results show that ＂Farmer joy＂ and Glyphosate have a stable effect, which can increase yield by 4.3%~12.5% than regular treatment and save cost by 78-120 Yuan/667m2 （income increase rates： 16.4% -24.7%）, suitable to local extension. In the same condi- tions, the ＂Kewuzhong＂s application effect is not good and not suitable to be used individually in the no-tillage field.