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昆山市自1990年开始试验、示范、推广机械直播水稻,表现出劳动生产率高、农艺技术简便、省工增效较为显著等优势,1997年实种面积已达9.85万亩。然而在生产实践中,发现机直播单季晚稻在茬口季节、确保全苗、根除草害、调控群体等方面存在一定的风险,稳产性较差。因此,1993年以来选择不同土壤类型实施了不同稻作方式生产力比较试验、机直播水稻应用品种比较试验、不同播期试验、“密
Since 1990, Kunshan City has experimented, demonstrated and popularized the mechanical direct-seeded rice, showing the advantages of high labor productivity, simple agronomic technology and obvious labor-saving and efficiency enhancement. In 1997, the plant area has reached 98,500 mu. However, in production practice, it is found that there is a certain risk in the direct seeding single season late rice during the stubble season to ensure the whole seedling, the eradication of grass and the regulation of the population, and the poor stability and yield. Therefore, since 1993, different soil types have been selected to carry out comparative experiments on productivity of different rice cultivation methods, comparative experiments on rice varieties under direct seeding, different sowing dates,