为提高科学种田水平,促进农业四化的实现,我们研究了适应水稻机械化发展的化学除草技术.由于机械直播稻田的草害极为严重,消除草害便成为直播水稻成败的关键.消灭直播稻田的杂草难度比较大,只有高速度高效果灭草的方法才符合机械作业的要求.为此,我们探索了直播稻田适合机械化的杂草防除途径.一、直播稻田的杂草种类、发生规律及其为害几年来,我省直播稻的发展有三个类型, In order to improve the level of scientific farming and promote the realization of four modernizations in agriculture, we studied chemical weeding technology to adapt to the development of mechanization of rice, which has become the key to the success or failure of direct-seeded rice due to extremely severe grass damage on direct-seeded rice fields. Weeds are more difficult, and only high-speed and high-efficiency weed-killing methods are suitable for the mechanical operation. Therefore, we explored the mechanized weed control ways for direct-seeded rice fields. Its damage for several years, our province has three types of direct-seeding rice development,