Supercharging Pineapple Yields: How PSB & KMB Biofertilizers Drive Leaf Mass, Fruit Weight, and Sugar Content

Pineapple (Ananas comosus) is a tropical bromeliad with a long crop cycle (12–18 months) and significant nutrient demands. Because pineapple plants feature a relatively limited, shallow root system, efficient nutrient uptake from the upper soil zone is critical. Phosphorus (P) is vital during sucker establishment, canopy leaf expansion, and early inflorescence emergence, while Potassium (K) is the dominant driver for fruit sizing, eye development, acidity regulation, sugar synthesis (Brix), and juice density.

In acidic, highly leached tropical soils, synthetic phosphatic fertilizers tend to react with iron and aluminum, forming fixed complexes, while applied potassium can leach or become trapped within clay layers. Applying Phosphate Solubilizing Bacteria (PSB) (Bacillus megaterium) and Potassium Mobilizing Bacteria (KMB) (Frateuria aurantia) ensures a steady flow of bioavailable nutrients to the root zone:

• Vegetative Leaf Expansion & Root Vigor: PSB secretes organic acids (citric, gluconic) that release trapped orthophosphate, driving robust leaf length, high chlorophyll accumulation, and dense adventitious root branching,

• Maximum Fruit Weight & Eye Development: KMB converts locked potassium minerals into plant-available, facilitating sugar translocation into the developing syncarp (fruit), resulting in larger fruit diameter, well-filled fruit eyes, and higher average weight per unit,

• Higher TSS (Brix) & Optimal Flavor Ratio: Readily available biological potassium boosts sugar synthesis, raising total soluble solids (TSS/Brix) and balancing fruit acidity for a sweet, highly palatable juice profile in commercial varieties like Queen and Kew,

• Drought Resilience & Canopy Strength: Beneficial bacterial colonization secretes natural growth regulators and exopolysaccharides, strengthening leaf cuticle wax and helping plants tolerate dry spells without losing fruit weight,