水稻免耕栽培除草灭茬技术探讨

Technologies of eliminating weeds and ratoons in notillage cultivation of rice

通过田间对比试验 ,早造水稻免耕田除草灭茬每公顷用农民乐 74 7除草剂 3kg,或克芜踪 375 0 m l,效果最好 ;晚造灭茬 ,前作留茬应低于 12 cm ,每公顷用草甘膦 15 kg加百草枯 30 0 0 ml和碳铵 30 kg,或克芜踪 4 5 0 0 ml加碳铵30 kg,灭茬效益最高。

According to the comparative test of eliminating weeds and ratoons in notillage cultivation of rice during 2002~2003 in Pubei County, the best effect of the elimination in early cropping resulted by the treatment of 3 kg of 74.7% glyphosate or 3750ml paraquat /hm2. The best elimination effect in the late cropping resulted by the treatment of 15 kg of 74.7% glyphosate added by 3000ml paraquat and 30kg ammonium bicarbonate, or 4500ml paraquat added with 30 kg ammonium bicarbonate.