RESEARCH ON PRODUCTION OF MICROBIAL PREPARATIONS TO TREAT POSTHARVEST AGRICULTRURAL BY-PRODUCTS

Abstract

             Treatment of agricultural waste and by-products by biological methods is paid special attention in present, because it helps to reduce environmental pollution of agriculture and rural areas and satisfies a part of requirement of organic fertilizer. The authors have studied the selection of indigenous microorganisms that have high ability to decompose cellulose compounds to produce microbial products which help to shorten decomposing time and improve the quality of organic matters. Within the scope of this paper, the authors present some results: Five microorganisms strains which have been isolated and selected are: cellulose decomposing bacteria (VPX5, HNX2), nitrogen fixation bacteria (HLN5), phosphorus decomposing bacteria (HNL1) and antagonistic bacteria (VPK2) from the soil samples and the waste decomposed from Ha Nam, Vinh Phuc, Quang Nam, Thanh Hoa and indentified the optimal specifications for multiplying biomass of these micro strains; have chosen carriers for the production of microbial products including 95% of peat + 5% of molasses and constructed the production process of two the VNBAC microbial preparations (VNBAC1 and VNBAC2) to treat agricultural by-products, creating high-quality organic matters, ensuring the density of cells of each strains to reach 108 CFU/g, and the best time to use the products is within 6 months from the date of manufacture.