Optimization of Compost Quantity for Fruit Body Yield in Button Mushroom (Agaricus bisporus)

The experiment was conducted to investigate the effect of substrate quantity on yield of button mushroom using plastic bags under controlled condition. No significant difference in morphological characteristics viz. pileus diameter, stipe length and average fruit body weight was observed, however, increase in mushroom yield was recorded with increase in compost quantity. Significant increase in yield was recorded upto 3 kg of compost. Biological efficiency did not exhibit any significant difference using different quantity of substrate. However, maximum biological efficiency of 10.13 was recorded with 3 kg of substrate and thereafter exhibited a consistent decrease with lowest being observed with 5 kg of substrate.