Thinley Gyeltshen & Tshering Dorji
Agriculture in the country is transforming from subsistence to commercial farming system. Most of the time crop residues are left unutilized in the field after harvest. Burning crop debris after harvest is an age old tradition followed by farmers here in Bhutan. Mushroom growers inoculate Oyster mushroom only in rice straw unlike in other countries. Therefore, to diversify Oyster mushroom inoculation to enhance production in the country, and to find best alternative substrates other than rice straw, a comparative study on growth and yield of Oyster mushroom (Pleurotus ostreatus) on different substrates was conducted. Pleurotus ostreatus strain ‘PBN’ was selected species in the study. A Completely Randomize Design (CRD) with five treatments and five replications including control (Paddy straw) was used. Data were analyzed through one-way ANOVA with SPSS version 22. The treatment mean of five replications were compared using Tukey’s Multiple Range Test. The yield and mycelium colonization rate differed among substrates under same climatic condition. There is significant difference in yield between control and T1, T3&T4, and no significant difference in yield between T0&T2 (P<0.01). However, higher yield is obtained from T2. Significant differences in colonization rate were observed among T0, T4 & T3 and in pin head formation among T0, T1 & T3. Yield obtained from each flush from each treatment is directly proportional to the number of pin head formed in each treatment. A total of four effective flushes from five replications were evaluated for yield analysis.
Keywords: Oyster mushroom, Mycelium colonization, Yield, Primordia
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