Z-FERT: natural fertility for better plant growth

Global agriculture faces critical challenges as soil fertility declines due to intensive farming practices and excessive chemical fertilizer use, with approximately 33% of soils worldwide being moderately to highly degraded. This study introduces Z-FERT, an innovative biological approach that utilizes Zophobas atratus larvae to transform horse dung into an effective organic fertilizer for enhanced plant growth. The research employed a Randomized Complete Block Design with seven replicates per treatment, conducted over six weeks using Spinacia oleracea (spinach) as the model plant species. The experimental framework incorporated Z. atratus larvae (1.5-2.5 inches) to accelerate the decomposition of sterilized horse dung (100g per sample), creating a nutrient-rich organic fertilizer. Soil organic matter content, plant height, dry biomass, and relative growth rate were measured using Loss on Ignition method and statistical analysis through two-way ANOVA and paired t-tests. Results demonstrated that horse dung-treated soil showed significantly higher organic matter content (2.588 ± 0.13%) compared to control groups. Plants grown in horse dung-treated soil exhibited significantly greater height increases (p = 0.001), with growth rates of 19.05% versus 14.29% in control conditions. The relative growth rate was also significantly higher (0.025±0.004 g/day) compared to control soil (0.012±0.0026 g/day). This innovative approach represents a breakthrough in sustainable agriculture by providing a scientifically rigorous, economically viable solution to soil degradation. Z-FERT harnesses natural decomposition processes to create a scalable alternative to chemical fertilizers while reducing organic waste pollution and CO₂ emissions, ultimately supporting next-generation farming practices that balance high productivity with environmental stewardship.