This study evaluates the effectiveness of liquid algae fertilizers as a sustainable alternative to conventional chemical and organic fertilizers. Chemical fertilizers have historically increased crop productivity; however, excessive use has contributed to soil degradation, nutrient runoff, and water quality impairment. Organic fertilizers can improve soil structure and microbial diversity but may also introduce ecological and nutrient-management challenges. Liquid algae fertilizers, derived from Chlorella vulgaris, offer a promising alternative due to their rich nutrient content and ability to enhance soil structure and plant growth.
A controlled soil amendment experiment was conducted to compare liquid algae fertilizer, a commercial chemical fertilizer (10-10-10 NPK), organic fertilizer (chicken manure), and a water-only control. Soil and plant parameters evaluated included soil pH, electrical conductivity (EC), soil moisture content, organic matter content, and cation exchange capacity (CEC). Preliminary results indicate that liquid algae fertilizer positively influenced soil electrical conductivity within five days of application, suggesting enhanced nutrient availability. Results also indicate that liquid algae fertilizer increased soil cation exchange capacity at levels comparable to the commercial NPK fertilizer. These findings prompted further evaluation of cation exchange capacity and soil nutrient composition.