Testing the Quality of Biofertilizer <i>I</i><i>lletrisoy</i>

Abstract

This is a descriptive analytical study, aims to assess the quality of bio-fertilizers Illetrisoy up to viability resilience bacterial during the storage. Illetrisoy A and B are the two types of biological fertilizers that contains of beneficial bacterial to improving growth and productivity of soybean. The research conducted covers the identification of the microbial are contained in the biological fertilizer Illetrisoy, the characterization of carrier matter and the viability of bacteria on the carrier matter during storage in different of packaging (plastic bag, allumunium foil, and plastic bottle) and storage temperature (refrigerator, room temperature, and incubator 40°C). The research shows that Illetrisoy A and Illetrisoy B contain 4 species of bacteria from the genus Phaenibacillus and Bacillus. The carrier of Illetrisoy is a mixture of RawaPening peat soil and charcoal powders provides a good quality in Illetrisoy A (pH 6.75, C 22.13 g kg-1, N 1.32 g kg-1, P2O5 389 mg kg-1, K 2.68 cmol kg-1and microbial population 36.5 x 108cfu g-1 of matter) and Illetrisoy B (pH 6.92, C 21.74 g kg-1, N 1.25 g kg-1, P2O5 412 mg kg-1, K 2.47 cmol kg-1and microbial population 34.9 x 108cfug-1 of matter). The product of biological fertilizer Illetrisoywith water content 50-60 % could be stored in the plastic packaging bags and be placed in refrigerator temperature 4oC. On the conditions of storage, the product of biological fertilizers Illetrisoy can be survived for 3 months, with the viability of bacteria preserved on the total population of 108cfug-1 of matter.