Published 12 issues per year
ISSN Print: 1521-9437
ISSN Online: 1940-4344
Indexed in
Influence of Aeration on Development and Productivity of Edible and Medicinal Mushroom Pleurotus eryngii (DC.: Fr.) Quel. (First Contribution)
ABSTRACT
Pleurotus eryngii (DC.: Fr.) Quel. is a cultivated mushroom that is highly appreciated in Southern Italy and also has commercial potential in other European countries. The high production cost, due mainly to the long incubation time, limits the diffusion of this fungus. A reduction of the incubation phase would strongly reduce the production costs, making this organism competitive on the market. It is well known that a high concentration of CO2 may inhibit mycelium development of this species if air flow is not provided in the biofermentor. We decided to study the effect of aeration of the growth room and, consequently, the effect of gas exchange between substrate and environment, on the length of the incubation time and of carpophore production. A Sardinian isolate of P. eryngiiwus cultivated on a substrate based on wheat straw and sugar beet. contained in two types of plastic bag, a traditional one and a new, "transpirant" bag, in which gas exchange occurs more easily. In the "transpirant" bags fungal mycelium was able to completely colonize the substrate within 45 days of incubation, while in the traditional bags the time needed increased up to 90 days. Moreover, highly significant differences in mushroom productivity were obtained in the "transpirant" bags. These results seems to demonstrate the important role of CO2 and of О2 on mycelium development and on the productivity of this species. In order to reduce the incubation period of P. eryngii and to achieve complete substrate colonization, frequent gas exchange between compost and the environment is therefore recommended to ensure a continuous and adequate oxygen rate.
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