According to the present invention, there is provided a fungal bed cultivation method of a hon-shimeji mushroom, wherein induction of primordia of a fruit body is conducted by illumination under incubation conditions, and an ongoing culture for fungal bed cultivation of a hon-shimeji mushroom, wherein primordia of a fruit body have been formed thereon during incubation. The culture medium is maintained in a clean state and it is advantageous because the formation of primordia of a fruit body can be carried out in a clean environment and the culture medium wherein primordia of a fruit body have been formed can be transferred to distant mushroom cultivation facilities under clean conditions as such.本發明提供一種藉由在培養條件下進行光照射而進行子實體原基誘導的真姬離褶傘之菌床栽培方法、以及在培養中進行子實體原基形成的培養中之真姬離褶傘菌床栽培用培養物。該培養物經維持在清潔之狀態,從而可在清潔之環境下進行子實體原基形成,並且可於清潔之條件下將子實體原基形成後之培養物直接移送至遙遠地方之菇類栽培設施的方面亦較有用。
