Growth requirements of Volvariella speciosa (Fr. ex. Fr.) Sing., a Nigerian mushroom

Growth requirements of Volvariella speciosa (Fr. ex. Fr.) Sing, were studied. All the tested carbohydrates except cellulose significantly enhanced mycelial growth. Mannitol was the most utilized, followed in order by fructose and maltose. All the organic and inorganic nitrogen sources investigated significantly improved growth, with tryptophan being the best. CN ratios also affected growth and a ratio of 1:4 was the most stimulatory. Calcium, magnesium, sodium, potassium and zinc significantly enhanced growth whereas hormones and vitamins did not. The implication of these results is discussed in relation to cultivation of V. speciosa in Nigeria.