PROBLEM TO BE SOLVED: To provide a composition for cultivation of agricultural and horticultural product, which can block, in production of an agricultural and horticultural product, radioactive cesium within a cultivation substrate, prevent the cesium from transferring into the agricultural and horticultural product such as a mushroom, and thus effectively prevent the deterioration of quality of the agricultural and horticultural product by causing an active ingredient contained in a cultivation composition that is a cultivation substrate or a cultivation substrate including the cultivation composition effectively and selectively adsorb the cesium adhered to the cultivation substrate through atmospheric air or water.SOLUTION: An composition for cultivation of agricultural and horticultural product includes, as essential components, a metal ferrocyanide compound, a nutrient and a nutrient support.COPYRIGHT: (C)2013,JPO&INPIT【課題】農園芸産物生産において、栽培基材である栽培用組成物、或いは栽培用組成物を含む栽培基材に含まれる有効成分が、大気や水を介して栽培基材に付着した放射性セシウムを効果的に、かつ選択的に吸着することにより、栽培基材中で該セシウムを封鎖し、該セシウムがキノコなどの農園芸産物中に移行するのを防ぎ、延いては農園芸産物の品質劣化を有効に防止する農園芸産物栽培用組成物を提供する。【解決手段】フェロシアン化金属化合物、栄養素、及び栄養素保持体を必須成分とする農園芸産物栽培用組成物である。【選択図】なし