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Related Concept Videos

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Optimizing Agronomic Zinc Biofortification in Carrots.

Godfred Okyere-Prah1, Paul A Asare1, Kwadwo K Amoah1

  • 1Department of Crop Science, School of Agriculture, College of Agriculture and Natural Sciences University of Cape Coast Cape Coast Ghana.

Plant-Environment Interactions (Hoboken, N.J.)
|September 25, 2025
PubMed
Summary

Zinc biofortification in carrots improves yield and nutritional content. Early and foliar applications are most effective for increasing zinc in plants, especially in deficient soils.

Keywords:
Daucus carota LZn application methodsZn biofortificationnutrient accumulationtime of Zn applicationtropical agriculture

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Area of Science:

  • Agricultural Science
  • Plant Nutrition
  • Soil Science

Background:

  • Zinc deficiency impacts over 2 billion people globally, particularly in areas with zinc-deficient soils.
  • Biofortification of staple crops like carrots is a sustainable strategy to address widespread zinc deficiency.
  • Understanding optimal zinc application methods is crucial for enhancing crop yield and nutritional value.

Purpose of the Study:

  • To investigate the effects of different zinc (Zn) application methods, rates, and timings on carrot growth, yield, and zinc accumulation.
  • To determine the most effective strategies for zinc biofortification in carrots for improved human nutrition and agricultural productivity.
  • To analyze the impact of soil versus foliar application on zinc uptake and translocation in different carrot tissues.

Main Methods:

  • Greenhouse study evaluating zinc application via soil and foliar methods.
  • Tested zinc rates from 0 to 6 kg ha⁻¹ at 30, 50, and 70 days after sowing (DAS).
  • Measured plant growth parameters, chlorophyll content, carrot yield, and tissue zinc concentrations.

Main Results:

  • Zinc application significantly enhanced carrot growth, chlorophyll content (up to 36%), and yield (up to 97.2%).
  • Foliar application resulted in higher shoot zinc concentrations (51% more than soil application at 6 kg ha⁻¹).
  • Early application (30 DAS) maximized root zinc accumulation (175% increase vs. control), with an optimal rate around 6 kg ha⁻¹.

Conclusions:

  • Zinc biofortification effectively improves both nutritional value and agricultural productivity in carrots.
  • Optimal strategies involve early application (30 DAS) and potentially combined soil-foliar methods for sandy soils.
  • Findings provide viable solutions for combating zinc deficiency in affected regions through crop enhancement.