The effects of using photosynthetic bacteria in bio-fertilizer products

This study aimed to examine the chemical composition of the bio-fertilizer formula by utilizing photosynthetic bacteria (PB) combined with other components, including agricultural residual raw materials, including rice husk (RH), Teak sawdust (TS), corn kernel (CK), coconut bark (CK) and cattle manure (CM). Eight treatments were arranged in a Complete Randomized Design (CRD) with three replicates. In the production of the bio-fertilizer formula, materials were fermented in black plastic bags for a total fermentation period of 45 days. Subsequently, the bio-fertilizer samples were analyzed to determine Chemical composition value, including pH, OM, N, P₂O₅, K₂O and EC. The results of each bio-fertilizer formula exhibited statistically significant differences at 95% (p<0.05). The bio-fertilizer formula with higher chemical composition values than all others was treatment T₈, which showed increases in the following parameters: OM (25.22%), N (4.47%), P₂O₅ (0.25%), K₂O (1.29%) and EC value (2.58 dS/m), followed by treatment T₇. Furthermore, when compared with bio-fertilizer formulas without PB composition (T₁-T₄), statistically significant differences were observed, with increases in chemical composition for 1-3 times. From this study, it can be concluded that photosynthetic bacteria (PB) solution can enhance the chemical composition values for plant nutrients in each bio-fertilizer formula, with statistically significant correlations.