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采用耕作方法消灭杂草是我国传统农业的重要内容之一。我区稻田的主要杂草为稗草、三棱草和芦草,其生命力顽强,传播方式多,繁殖力高,是水稻生产的顽敌。过去调查,在插秧田中,每穴混有稗草1～2株,随稗子分蘖力的不同,水稻减产在20.2～63.6,严重的减产92.07%;水稻旱直播因稗草和三棱草危害,每亩水稻减产在200～400余斤,损失严重。近年来,大力推行化学
The use of farming methods to eliminate weeds is one of the important contents of traditional agriculture in our country. The main weeds of paddy field in our district are barnyard grass, rhombic grass and reed grass. Their vitality is tenacious, their propagation mode is high and their fertility is high. They are the enemy of rice production. In the past investigation, 1 to 2 strains of barnyardgrass were mixed per hole in the field of seedling transplanting. With the different tillering power of the weeds, the yield reduction of rice was between 20.2 and 63.6% with a serious decrease of 92.07% The yield per mu of rice is between 200 and 400 jin and the loss is serious. In recent years, vigorously promote chemistry