EFFECT OF DIFFERENT SAWDUST SUBSTRATE ON THE GROWTH, YIELD, AND PROXIMATE COMPOSITION OF OYSTER MUSHROOM (Pleurotus high-king)

Abstract

The study was conducted at the Biochemistry laboratory and Mushroom Culture House (MCII) of the Department or Biochemistry, Sher-e-Bangla Agricultural University. Dhaka - 1207 during the period from June to December 2015 to study effect of different sawdust on the growth, yield and proximate composition of oyster mushroom (Plew-otus high-king). Mother culture of oyster mushroom (Pleuroxus high-king) was used as experimental materials. The experiment consists of six different type of sawdust. The experiment was laid out in single factor Completely Randomized l)esign (CRD) with three replications. Data on different growth, yield and nutrient composition and mineral content were recorded and significant variation was found for different studied parameter. The highest mycelium running rate (0.64 cm) was recorded from I'3, while the lowest mycelium running rate (0.47cm) was observed in T2. The maximum average number of fruiting body per packet (83.33) was observed from T4. again the minimum average number of fruiting body per packet (50.00) was found in 'l'2. The highest average weight of individual fruiting body (4.0 g) was attained from 1*1 and the lowest average weight of individual fruiting body (2.99 g) was thund in T2 The highest biological yield observed in i'4 and T1 was (297.00g) and the lowest attaind from T5 was (280.4). The highest economic yield (296.7g) was found from 14

and T1.the lowest economic yield was found in T5 (280.0g).The highest benefit cost ratio (4.13) was found from 14 and the lowest benefit-cost ratio (3.88) was attained in T2 and T.I. In ease of proximate analysis, the highest moisture content (90.38%) was observed from 14, while the lowest moisture content (90.02%) was found in T. The highest protein content (26.24%) was recorded from T4, while the lowest protein content (21.43%) was observed in T2. The highest carbohydrate (42.23%) was observed from T2, whereas the lowest carbohydratc content (36.85%) was observed in T53'he highest amount of calcium content (2.13%) was attaind from 14 while the lowest (1.53%) from 13 The highest amount of lipid content (4.45%) was attained from 1'4 whereas the lowest lipid content (3.5 1%) was found in 1',. Among the treatments i'4: Mahagony sawdust -1 30% wheat bran was found contributed significantly different growth. yield and nutrient composition and mineral content of oyster mushroom (Plewvlus high-king).