PROBLEM TO BE SOLVED: To ensure cultivation of plants by preventing excess or short supply of liquid according to the weather.SOLUTION: A nutritious liquid supply apparatus is configured so that: liquid supply controlling means which controls nutritious liquid supply to cultivation beds (5) is provided； the liquid supply controlling means sets liquid supply available time zone in which liquid can be supplied during daytime in a day, supplies liquid every time when accumulated amount of solar light based on a solar radiation sensor reaches set accumulation amount of solar light if it is in the liquid supply available time zone, and making at least a part of time zone in liquid supply available time zone correction time zone, corrects liquid supply available time zone based on accumulated amount of solar light for correction in correction time zone.COPYRIGHT: (C)2016,JPO&INPIT【課題】 本発明は、天候に応じて給液の過剰や不足を防止することにより、植物の栽培を的確に行うことを課題とする。【解決手段】 栽培ベッド（５）への養液の給液を制御する給液制御手段を設け、該給液制御手段は、１日のうち日中に給液が可能な給液可能時間帯を設定し、日射量センサに基づく積算日射量が設定積算日射量に達する度に給液可能時間帯であれば給液し、給液可能時間帯における少なくとも一部の時間帯を補正用時間帯とし、補正用時間帯における補正用積算日射量に基づいて給液可能時間帯を補正する構成とした養液供給装置とした。【選択図】図１
