Potassium nitrate sprays improve early fruit ripening in strawberries

Aspersion, Berries, Foliar, Maturation, Maturation, Performance, Precocity, Precocity, Strawberry, Strawberry,

In strawberry, hydrogen cyanamide (CH) and potassium nitrate (NP) can be used to interrupt dormancy. To study the effects of these substances, four experiments were conducted in Spain to find the most appropriate product, dosage and application period. In one of these experiments with 3.0% potassium nitrate and 0.5% CH, potassium nitrate produced the earliest harvest (P=0.05), but total yield was similar. The average fruit weight of plants treated with potassium nitrate and CH was higher than control plants at the end of the season, but no significant differences in early yield were detected (Table 1). Table 1. Commercial yield and average fruit weight after direct crown spray application with potassium nitrate (NP) and hydrogen cyanamide (CH).

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Author

Maroto, J. V., S. Lopez-Galarza, A. San Bautista, B. Pascual, J. Alagarda and M.S. Bono. 1997. Response of strawberry plants to hydrogen cyanamide and potassium nitrate applications. Acta Horticulturae VIII International Symposium on Plant Bioregulation in Fruit Production 463: 153-158.

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