EFFECT OF DIFFERENT SAWDUST ON THE GROWTH, YIELD AND PROXIMATE COMPOSITION OF Ganoderma lucidium

Abstract

The study was conducted at the Biochemistry laboratory and Mushroom Culture House (MCH) of the Department of Biochemistry, Sher-e-Bangla Agricultural University, Dhaka to study the effect of different sawdust on the growth, yield and proximate composition of Reishi mushroom (Ganoderma lucidum).Six different types of sawdust viz: jackfruit (Artocarpus heterophyllus) sawdust, mango (Mangifera indica ) sawdust, rain tree (Albizia saman) sawdust, shegun (Tectona grandis) sawdust, mahagony (Swietenia mahagony) sawdust and mixture of all five supplemented sawdust (jackfruit, mango, rain tree, shegun, mahagony) with 30% wheat bran and 1% lime as basal substrates were selected for research. Data on different growth, yield and nutrient composition and mineral content were recorded and significant variation was found for different studied parameter. Mycelium running rate in spawn packet and highest average number of primordia/packet was found to be differed due to different sawdust used. The highest average number of fruiting body per packet was obtained 10.00 with mango sawdust. The highest biological yield (97.3 g), economic yield (89.2 g), biological efficiency (55.60%), cost benefit ratio (4.89) was counted under mango sawdust with 30% wheat bran and 1% lime. Among the chemical characteristics highest content of carbohydrate (74.15%), protein (12.25%), ash (1.36%), lipid (3.23%) was found with mango sawdust treatment. Among the minerals highest amount of nitrogen (1.96%), potassium (2.65%), calcium (1.92%) was found with mango sawdust with 30% wheat bran and 1% lime treatment and the lowest amount of magnesium (0.673mg), zinc (15.15mg) was found with jackfruit sawdust with 30% wheat bran and 1% lime treatment. Therefore it can be concluded that mango sawdust with 30% wheat bran and 1% lime contributed significantly on different growth, yield and nutrient composition and mineral content of Reishi mushroom (Ganoderma lucidum) .