INFLUENCE OF SUBSTRATE SUPPLEMENTS ON CONTAMINATION, GROWTH AND YIELD OF OYSTER MUSHROOM (Pleurotus ostreatus)

Abstract

ABSTRACT

An experiment was conducted at the Mushroom Culture House (MCH) and Plant Pathology Laboratory of the Department of Plant pathology, Sher-e-Bangla Agricultural University (SAU), during July to October 2020, to investigate the impact of enrichment of substrate with different supplements on contaminations, growth and yield of oyster mushroom. The experiment was followed by Completely Randomized Design (CRD) with 3 replications. Sawdust along with different levels of supplement (viz: Compost, Vermicompost, Mustard oil cake and their mixtures @ 5, 10 & 15 g) were considered used as different treatments for this present experiment. Application of different doses of supplements along with sawdust showed significant variations in respect of the growth and yield characteristics of mushroom. From the experiment it was revealed that the maximum number of primordia /packet (80), number of fruiting body /packet (54.67), number of effective fruiting body /packet (41), stipe length (2.69 cm), length of the fruiting body (6.56 cm), breadth of the fruiting body (5.67 cm), biological yield (153.67 g), economic yield (116.67 g), dry yield (29.33 g) and biological efficiency (51.22 %) were observed in T 2 (10) g Compost supplemented sawdust spawn packet. While the lowest value was observed in Control. Four contaminants viz Penicillium sp, Rhizopus sp, Trichoderma sp, Aspergillus sp were isolated and identified from the contaminated spawn. There was no contamination was observed in T 1 , T 2 , T 3 , T 4 , T 10 and T

during the whole period of experiment whereas the highest contamination severity (77.33%) was recorded from 5g mustard oil cake treated packet at 60 DAT. 11