Effect of different growing media and bio-fertilizers on tomato production in plastic greenhouses

Summary

This greenhouse factorial trial evaluated combinations of growing media (soil, vermicompost and sand in varying ratios) and bio-fertilizer treatments (Azotobacter and phosphate solubilising bacteria) on protected tomato production. A soilless medium of vermicompost to sand (2:1) combined with Azotobacter seedling treatment yielded the highest fruit production and quality metrics, including yield of 5.01 kg per plant and elevated ascorbic acid (36.45 mg per 100 g) and lycopene (5.21 mg per 100 g) over two growing seasons.

Regional applicability

The findings are directly relevant to protected horticulture in the United Kingdom, where greenhouse tomato production is commercially significant. The principles of media composition optimisation and bio-fertilizer use are transferable to UK growing conditions, though vermicompost sourcing and seasonal adaptations would require local validation.

Key measures

Number of fruits per plant, average fruit weight (g), fruit yield per plant (kg), total soluble solids (°Brix), ascorbic acid (mg per 100 g), lycopene content (mg per 100 g)

Outcomes reported

The study evaluated the effects of different growing media compositions and bio-fertilizer treatments on tomato fruit yield, weight, and nutritional quality (soluble solids, ascorbic acid, lycopene) under protected greenhouse conditions. Soilless media with vermicompost and sand combined with Azotobacter inoculation produced the highest yields and nutrient concentrations.

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