PROBLEM TO BE SOLVED: To prevent floating seedlings, when using a high-density raising seedling mat.SOLUTION: A rice transplanter 1 includes: a seedling planting device 23 in which seedlings are scraped by a planting claw 30 from a seedling mat placed on a seedling placing stand 29, and are planted on a farm field and a lift control mechanism 39 in which the seedling planting device 23 is subjected to lift control on the basis of a detection value of a lift sensor 325 for detecting an inclination angle of a float 32a for adjusting a planting depth of seedlings. The rice transplanter is constituted as follows: when planting a high-density raising seedling mat, a planting depth of seedlings is deeper in comparison with a planting time of a standard-type raising seedling mat grown so that seedlings have a lower density than the high-density raising seedling mat.SELECTED DRAWING: Figure 35COPYRIGHT: (C)2018,JPO&INPIT【課題】高密度育苗の苗マット使用時の浮き苗を防止する。【解決手段】田植機1は、苗載台29に載置された苗マットから植付爪30で苗を掻き取って圃場へ植え付ける苗植付装置23と、苗の植付深さを調節するフロート32aの傾斜角度を検出する昇降センサ325の検出値に基づいて苗植付装置23を昇降制御する昇降制御機構39とを備える。高密度育苗の苗マットの植付時には、高密度育苗の苗マットよりも苗が低密度に生育された標準型育苗の苗マットの植付時に比べて、苗の植付深さが深くなるように構成している。【選択図】図35
