The role of microorganisms in solid biofertilizer production

Abstract

Trials of making organic fertilizer using seaweed, fish silage, molasses, and a consortium of microbes were carried out. This study aimed to determine the activity of Bacillus subtilis, Pseudomonas florescent, and Trichoderma sp to produce micro and macro nutrients, humic acid, water content, and growth hormone. The organic fertilizer formula consisted of 26.6% sargassum flour, 16% fish silage, 1.8% molasses, 2.4% K. alvarezii paste; and 53.2% sargassum paste. The treatments consisted of formulated without adding microbial consortium (SK) and with adding microbial consortium (SM) as much as 10% volume per weight (v/w), then fermented for 10 days at room temperature. The balance values of growth hormone auxin (IAA), gibberellin (GA3) and cytokinins in SM treatment were the best measured at 181 ppm, 73 ppm, and 120 ppm, respectively.