Growth Characteristics, Yield and Fruit Soluble Carbohydrate Content of Hydroponically Grown Strawberry with Carbon Dioxide Fertilization

Summary

This field trial examined CO₂ fertilization effects on hydroponically grown strawberries in a commercial setting. Whilst CO₂ application reduced vegetative growth metrics (leaf size by 12–14%, photosynthesis rate), it increased fruit mass by approximately 20% (fresh weight) and 27% (dry weight) in January, and progressively elevated sucrose, glucose and fructose concentrations during the measurement period. The authors conclude that long-term CO₂ fertilization in protected strawberry cultivation can suppress vegetative growth whilst enhancing fruit reproductive development and quality characteristics, though some effects lacked statistical significance.

Regional applicability

The findings are potentially relevant to United Kingdom protected horticulture (glasshouse strawberry production), particularly for commercial growers employing hydroponic systems. However, the trial was conducted in South Korea; transferability depends on matching climate control systems, cultivar, and growing protocols. UK growers considering CO₂ enrichment would need to verify effects under their own environmental conditions and labour economics.

Key measures

Leaf length and width; photosynthesis rate; stomatal conductivity; transpiration rate; fresh and dry fruit weight; total yield; sucrose, glucose and fructose concentrations (μg·g⁻¹); fruit firmness; soluble sugar and acid content

Outcomes reported

The study measured vegetative growth (leaf dimensions, photosynthesis rate), fruit yield, and fruit quality parameters including fresh/dry weight and soluble carbohydrate concentrations (sucrose, glucose, fructose). CO₂ fertilization reduced leaf growth but increased fruit weight and modified sugar composition over the measurement period.

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