PROBLEM TO BE SOLVED: To provide a work vehicle performing seedling planting work and fertilization simultaneously, capable of adjusting a fertilizer supply amount and fertilizer supply depth automatically according to conditions of a field, and thereby facilitating steering operation.SOLUTION: A work vehicle includes a paste fertilization device 7 arranged in a travel machine body 2 mounting a seedling planting device 3 thereon and a fertilizer is supplied from the paste fertilization device 7 to a fertilizer guiding member 72 so as to supply the fertilizer into soil in a field during seedling planting travel. The work vehicle includes: field depth detection means 18 detecting a field depth of the field a fertilizer concentration detection device 9 detecting a fertilizer concentration of the field fertilizer supply depth change means 73 changing a fertilizer supply depth of the fertilizer guiding member 72 and fertilization amount adjustment means 76a adjusting a fertilization amount and a control device 8 controlling the fertilizer supply depth change means 73 and fertilization amount adjustment means 76a based on the fertilizer concentration detected by the fertilizer concentration detection device 9 and the depth detected by the field depth detection means 18.SELECTED DRAWING: Figure 4COPYRIGHT: (C)2017,JPO&INPIT【課題】本発明では、苗植付作業と同時に施肥を行う作業車において、圃場の条件に応じて肥料供給量と肥料供給深さを自動的に調整出来るようにして、操縦操作を楽に行えるようにすることを課題とする。【解決手段】苗植付装置3を装着した走行車体2にペースト施肥装置7を設け、該ペースト施肥装置7から肥料案内部材72に肥料を供給して苗植付走行時に圃場の土中に肥料を供給可能にした作業車において、圃場の圃場深さを検知する圃場深度検知手段18と圃場の肥料濃度を検知する肥料濃度検知装置9と肥料案内部材72の肥料供給深度を変更する肥料供給深度変更手段73と施肥量を調節する施肥量調節手段76aを設け、肥料濃度検知装置9が検知する肥料濃度と圃場深度検知手段18が検知する深度に基づいて肥料供給深度変更手段73と施肥量調節手段76aを制御する制御装置8を設けたことを特徴とする作業車とする。【選択図】図4
