沈阳市农机化所研制的2BT-1.1型水稻苗床播种覆土机(见图1),是一种以人为动力的半机械化农具,去年底通过科研鉴定。该机用于水稻旱育苗播种覆土作业,由两人手推(或拉)操作。一次可完成床面上播种、压种、覆土、镇压等项作业,能满足水稻苗床育秧的农艺要求。作业时(见图2),前地轮5将动力经过双道链轮传动机构6传递给排种机构3和覆土机构9。此时, 2BT-1.1 type seedbed planting machine (see Figure 1) developed by Shenyang Agricultural Mechanization Institute is a man-powered semi-mechanized farm implements which was appraised by the end of last year. This machine is used for paddy seedling planting rice covering operation, by two hands (or pull) operation. Once completed on the bed sowing, seed, soil cover, repression and other operations, rice seedlings can meet the agronomic requirements. During operation (see FIG. 2), the front wheel 5 transmits the power to the seed arrangement mechanism 3 and the capping mechanism 9 via the double-sprocket drive mechanism 6. at this time,