Boron and zinc foliar application enhanced the morphophysiological responses and mineral absorption in the hydroponically grown ‘Aromas’ strawberry

Summary

This factorial greenhouse trial evaluated the effects of zinc sulfate (0, 100, 200 mg L−1) and boric acid (0, 500, 1000 mg L−1) applied three times as foliar sprays to hydroponically cultivated 'Aromas' strawberries. Optimal combined application (200 mg L−1 zinc + 500 mg L−1 boron) significantly enhanced fruit yield, shoot biomass, potassium and zinc uptake, and anthocyanin content, whilst improved nitrogen and boron absorption and fresh weight metrics across all treatment combinations, though manganese and copper content were unaffected.

Regional applicability

This hydroponic study conducted in Iran may have limited direct applicability to United Kingdom strawberry production, where soil-based and substrate systems predominate. However, the nutrient physiology findings regarding boron and zinc roles in fruit set and mineral bioavailability could inform UK horticultural practice, particularly for protected crops or intensive systems, though climate and cultivar differences warrant independent validation.

Key measures

Marketable fruit number and weight (g plant−1), shoot biomass, K and Zn content, anthocyanin concentration, N and B absorption, shoot and root fresh weight, Mn and Cu content

Outcomes reported

The study measured marketable fruit yield, number and weight per plant, shoot and root biomass, mineral nutrient content (N, K, Zn, B, Mn, Cu), and anthocyanin concentration in hydroponically grown 'Aromas' strawberries under foliar boron and zinc application.

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