PERFORMANCE OF DIFFERENT SUPPLEMENTS AND THEIR LEVELS ON GROWTH AND YIELD OF THREE OYSTER MUSHROOM SPECIES

Abstract

The experiment was conducted at the Mushroom Development Institute (MDI), Savar, Dhaka, during the period from June to September 2020 to find out the performance of different supplements and their levels on growth and yield of three oyster mushroom species. The experiment consisted of three Oyster mushroom species viz. V 1 (Pleurotus djamor), V 2 (Pleurotus florida) and V 3 (Pleurotuso streatus po10) with seven supplements to sawdust substrate, viz. S 1 (Wheat bran; WB), S 2 (Maize powder; MP), S 3 (Rice straw; RS), S 4 (Wheat bran + maize powder; 1:1), S 5 (Maize powder + rice straw; 1:1), S 6 (Rice straw + wheat bran; 1:1) and S 7 (Wheat bran + maize powder + rice straw; 1:1:1). The experiment was laid out in Completely Randomized Design (CRD) with three replications. In case of the performance of mushroom species, V 1 (Pleurotus djamor) showed best performance on the most of the growth, yield contributing parameters and yield compared to V 2 (Pleurotus florida) and V 3

(Pleurotuso streatus po10). Similarly, the performance of supplements to sawdust substrate, the highest mycelium run rate, total number of fruiting body and effective fruiting body packet -1 , biological yield, economic yield and biological efficiency per spawn packet were observed from the treatment S 7 (wheat bran + maize powder + rice straw; 1:1:1) compared others whereas the lowest was from S 3 (Rice straw; RS). Regarding combined effect of mushroom species and supplements to substrate, V 1 gave the highest mycelium ran rate (0.82 cm day -1 ) and shortest duration of mycelium run complete, pin head initiation and pin head initiation to harvest (14.25, 20.50 and 4.00 days, respectively). V 1 S 7 also gave the highest total number of fruiting body (24.75), number of effective fruiting body (17.13), length, diameter and thickness of pileus (6.39, 8.33 and 1.00 cm, respectively), biological yield (183.10 g), economic yield (173.50 g) and biological efficiency (73.24%) whereas V 1 gave least performance. So, this treatment combination (V 1 S 7 )

can be considered as best compared to other treatment combinations.