Microbial conversion of farm wastes into fertilizers
1992
Espiritu, B.M. | Abaoag, A.O. | Biagtan, N.R. | Palacpac, N.Q. (Philippines Univ., Los Banos, College, Laguna (Philippines). National Inst. of Biotechnology and Applied Microbiology)
A BIOTECH microbial process was developed to rapidly decompose farm wastes and improve their nutrient content using selected fungal and bacterial inocula. Fungal isolates were used to decomposed various farm wastes in two weeks; Trichoderma sp. strain HIBFF 7 was used on rice straws and coffee hulls, Trichoderma sp. strain HIBFF 3 on swine and chicken manures. Fungal treatments gave 60 to 300 percent increase in crude protein, 11 to 85 percent decrease in crude fiber, and 22 to 170 percent decrease in crude fat, in different substrates as compared to the control. Azotobacter sp. strain HIBFA 4b, a free-living nitrogen-fixing bacterial inoculum, was introduced into different 2-week old fermented materials. Nutrient contents were determined after one week. Treated composts showed significantly higher nutrient contents than the control with the following analysis: 2.3 to 6.9 percent N, 6.9 to 13 percent P and 2.7 to 3.5 percent K. Field trial results of coffee hull-based bio organic fertilizers gave significant yield increases in upland rice (Oryza sativa L.) cv. BPI-76 and baguio beans (Phaseolus vulgaris L.) cv. Silang over the control, over ordinary compost and over compost with manure
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