目前,水稻抛秧盘播种多以人工种土混播为主,其缺点是播种质量差,种子播深不一,出苗时间不一,影响秧苗素质,且工作效率低。我们在2BSP500型苗盘播种机的基础上,试制抛秧盘手摇式播种器,经试用效果良好,能满足农艺技术要求。一、结构及工作原理该手摇式播种器主要由机架、排种机构、排土机构、覆土机构、清土装置、传动装置等部分组成(见示意图) At present, the planting of rice throwing trays is dominated by mixed planting of artificial soil. The disadvantage is that the sowing quality is poor, the sowing depth is different, the emergence time is different, the quality of the seedling is affected, and the work efficiency is low. On the basis of 2BSP500 seedling seeder, we try to make a throwing seedling tray hand-held seeder which has good test results and meets the requirements of agronomic technology. First, the structure and working principle The hand-held seeder mainly by the rack, seed row institutions, dumping agencies, soil cover agencies, earthworks, transmission and other components (see diagram)