Composting Agricultural Residues For Value Addition: Supplementation Studies

ISBN: 3639276051

Author: Garcha, Seema

Condition: New

Three supplements,Cottonseedmeal(CSM),Soyabean meal(SBM) and Peanutmeal(PNM)@2% were evaluated on strains P1 and U3 of Agaricus bisporus. Wheat straw compost with three initial N level 1.75%,1.5% and 1.25%.Supplementation of CSM at the time of spawning in 1.75% N compost gave the best results.Ruffling of the compost during supplementation had a detrimental effect,related to the increase in temperature. Of the four concentrations of supplement tried, CSM @2% added at the time of spawning or casing proved to be best giving a yield of 29.6 and 31.3 kg/100kg compost, respectively.Treatment of CSM and SBM with 1000-7000ppm of formaldehyde andb addition at spawning/casing had no positive effect on the yield.The yield response of seven strains to the supplementation of formaldehyde treated (3000ppm CSM @1.5%) on three types of compost mixture resulted in poor yield.Three growth promoters,cysteine hydrochloride, hydroxyl ammonium chloride and ethylene glycol were also evaluated.All of them resulted in increased protease (162- 166%) and cellobiase (150-175%) activity.An increase in yield of 16% and 28% of U3 and P1 respectively,was obtained with weekly spray of ethylene glycol(@3500ppm)