水稲代かき同時打込み点播機の作業性能および栽培特性

抄録

Performance test of the seed-shooting seeder of rice was carried out in some soil conditions of paddy field and the growth characteristics of rice were investigated.
The results were as follows:
1) Soil viscosity and seeds velocity just shot onto soil surface seemed to influence the germination depth of rice. The depth was 5-20mm in the case that seeds were shot into submerged soil (viscosity: 50-150dPa·s) of a paddy field.
2) The form dimensions of the hill-seeded spot (ellipse in shape) which was obtained in a paddy field was 6-10cm (longer diameter) and 3-5cm (shorter one).
3) Work efficiency of the seeder was 0.4ha/h (working width=2.4m). It was generally equal to one of rotary type transplanter of rice.
4) Lodging tolerance of the hill-seeded rice was nearly equal to one of the transplanted rice and was superior to one of the broadcasted rice.
5) Yield of the hill-seeded rice was about 10% inferior to one of the transplanted rice.