PROBLEM TO BE SOLVED: To provide a hollow cultivation tank that makes a water level, quality, and concentration of culture solution uniform, and can keep the temperature of culture solution playing important role for growth of plants a fixed level by necessary minimum energy.SOLUTION: A cultivation tank for hydroponics comprises a cultivation tank body 1 having a liquid reservoir part 1a which stores culture solution 50, and a cultivation shelf 2 holding plants 8. The cultivation tank body 1 is in a hollow multilayer wall structure equipped with at least an inner wall 10 and an outer wall 11, the multilayer wall structure is partitioned by at least one partition part 3 and a plurality of hollow parts 4 are formed. Because the cultivation tank body 1 is in the hollow multilayer wall structure, and an air layer through which heat is hard to be transmitted is formed between the inner wall 10 and the outer wall 11, the temperature of the culture solution 50 supplied to the liquid reservoir part 1a is kept at an approximately fixed level, and does not become excessively low temperature or excessively high temperature, so that the plants 8 grow smoothly.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2016,JPO&INPIT【課題】培養液の水位、品質、濃度を均一化すると共に、植物の生育に重要な役割を果たす培養液の温度を、必要最小限のエネルギーで一定に保つことのできる中空栽培槽を提供する。【解決手段】培養液50を溜める液溜め部1aを有する栽培槽本体1と、植物8を保持する栽培棚2を備えた水耕栽培用の栽培槽であって、栽培槽本体1は、少なくとも内壁10と外壁11とを備える中空の多層壁構造体となっており、該多層壁構造体は少なくとも1つの仕切り部3により区切られて、複数の中空部4が形成された構成とする。栽培槽本体1が中空の多層壁構造体であり、内壁10と外壁11との間に、熱を伝え難い空気層が形成されるため、液溜め部1aに供給される培養液50の温度が略一定に保たれて、低温になり過ぎたり高温になり過ぎたりしないため、植物8が順調に生育する。【選択図】図2
