Cultivo de shimeji [Pleurotus ostreatus (Jacq.: Fr.) Kummer] em capim-elefante (Pennisetum purpureum Schum) suplementado com farelos

Abstract

The edible mushroom Pleurotus spp. (shimeji) is cultivated in different lignocelullosics substrate. According to the medium formulation of cultivation, larger productivity can be obtained. Thus, this research were carried out to study the development, growth rate and the productivity of three P. ostreatus strains, under the effect of brains supplemented in different concentrations to the medium of culture to the elephant grass base. In experiment 1 it was studied the three mushroom strains cultured in elephant grass culture media supplemented with soy, wheat, rice or corn bran with three different concentration (0, 10 and 20%). The cultures were incubate at 28ºC for six days. Mass and mycelium growth were evaluated. In experiment 2 it was studied dry elephant grass cut in small fragments, and enriched with the same substrate used in experiment 1. The cultures were incubated for 19 days at 28ºC and the mycelium growth was evaluated. In experiment 3 it was used the same treatments as in experiment 2. However the aim of this experiment was to evaluate productivity and biological efficiency. It was verified that the medium of cultivation with 20% of soy brain increased the mycelium mass and the growth mycelium for the three strains of P. ostreatus, except for the growth mycelium of HF19; wheat bran supplement was less efficient than soy bran, while rice and corn they did not present increase effect of the mycelium mass and growth mycelium of the cultivated strains. In the mycelia phase supplementation with brans did not increase the growth rate, but it increased the energy of the mycelium. The strain BF24 was the most productive compared to the others; elephantgrass supplemented with wheat, rice and corn bran in concentrations of 10 and 20% increased the productivity and biological efficiency, while the soy brain presented negative effect for the strains of P. ostreatus.