A Practical Study on development of a seeding machine with correct seeding depth for direct seeding with coated rice in submerged paddy field.

完成了一种新型水田包衣稻直接播种播种机的研制。该播种机是为改进和稳定DSSP的百分比设置而研制的。它具有正确的播种深度，不受土壤质地和土壤硬度的影响。在设计时特别考虑了以下几点。播种深度近1厘米。灌水后立即在周水田播种的能力。本研究将旧播种机的投种机构应用于新型播种机。在水稻土中只制造了包衣水稻直接播种机作为试验。旧播种机的基本部件挖沟机被取消了。研制了一种新型播种轮。采用播种轮在水田中播种包衣水稻。在周水田的情况下，土壤从底部上升到浮子的顶部，并沿着停留在玫瑰土上的种子引导落下包衣的水稻。因此，它们不是通过播种机在水田中播种，而是在水田表面携带。为了解决这些问题，在浮子和导种器上增加了一些新的机构。三年来，在土壤槽和水田进行了多次试验。这种新型播种机，能在稳定的深度和每周的稻田中播种包衣水稻。希望本研究成果得到有效利用，推广DSSP栽培，降低水稻生产成本。

Development of a new seeding machine for DSSP (direct seeding with coated rice in submerged paddy field) has been completed. This seeding machine is developed for improvement and stabilization of percentage establishment for DSSP. And it has the correct seeding depth that are not under the influence of soil texture and soil hardness.The followings were especially considered for the design of it.1.Nearly 1 cm seeding depth.2.Ability of seeding in the week paddy field immediately after puddling.In this study, a seed feeding mechanism of the old seeding machine was applied to the new seeding machine. Only direct seeding mechanism which seeded the coated seed rice in paddy soil was manufactured as an experiment.A ditcher, it is a basic element of the old seeding machine, was did away with. A seeding wheel was developed newly. Coated rice were seeded in submerged paddy field by the seeding wheel.In the case of week paddy field, the soil rose to the top of a float from the bottom of it, and dropped coated rice along a seed guide stayed on the rose soil. As a result, they were not seeded in the paddy field by the seeding wheel and carried on the surface of paddy field. For solution of these problems, some new mechanism were add to the float and the seed guide.For three years, many experiments have been tried on a soil tank and paddy field. The new seeding machine, which is able to seed the coated rice at the stable depth and in very week paddy field.It is expected that the result of this study will be made good use of, cultivation by DSSP will be popularized, and the cost of rice production will be reduced.