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Purpose <p>This study aimed evaluating root morphometric variables, as well as the concentrations of N, P, K, Ca and Mg in roots and leaves of coffee throughout the stages of fruit development, in high-yielding year (HY) and low-yielding year (LY).</p> Methods <p>The experiment was settled in split-plot scheme and randomized block design, with three replications. The HY and LY years were assigned to the plots and the stages of fruit development to the subplots. In each phenological phase, root samples were collected in the crown projection of six plants, using a 51-mm diameter probe. Mature and young leaves were collected from branches of the same plants. N, P, K, Ca and Mg concentrations in root and shoot samples dry matter and, fresh mass, length, surface and volume of root were evaluated. Data were submitted to analyses of variance and regression.</p> Results <p>Fruit load promotes reductions in morphometric traits of coffee roots, with growth reduction in HY and growth recovery in LY years. In HY years, the concentrations of P, K, Ca and Mg decrease in the roots during fruit development. The points of minimum growth and concentration of nutrients in roots take place at the grain filling/ripening stages.</p> Conclusions <p>Fruit load modifies the morphoagronomic traits of coffee roots; contents of P, K, Ca and Mg in the roots decrease throughout fruit development; in well-managed crops, the effect of the high fruit load on the concentrations of N, P, K, Ca and Mg in mature leaves is small.</p>

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Root Growth, Leaf and Root Chemical Composition Along Coffee Fruit Development

  • 期刊论文

  • 发表日期：

    2025年2月3日

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  • Welliton de Magalhães,
  • Samuel Coelho Araújo,
  • Paulo R. Cecon,
  • Mateus Antero Nogueira,
  • Herminia E. Prieto Martinez

摘要

Purpose

This study aimed evaluating root morphometric variables, as well as the concentrations of N, P, K, Ca and Mg in roots and leaves of coffee throughout the stages of fruit development, in high-yielding year (HY) and low-yielding year (LY).

Methods

The experiment was settled in split-plot scheme and randomized block design, with three replications. The HY and LY years were assigned to the plots and the stages of fruit development to the subplots. In each phenological phase, root samples were collected in the crown projection of six plants, using a 51-mm diameter probe. Mature and young leaves were collected from branches of the same plants. N, P, K, Ca and Mg concentrations in root and shoot samples dry matter and, fresh mass, length, surface and volume of root were evaluated. Data were submitted to analyses of variance and regression.

Results

Fruit load promotes reductions in morphometric traits of coffee roots, with growth reduction in HY and growth recovery in LY years. In HY years, the concentrations of P, K, Ca and Mg decrease in the roots during fruit development. The points of minimum growth and concentration of nutrients in roots take place at the grain filling/ripening stages.

Conclusions

Fruit load modifies the morphoagronomic traits of coffee roots; contents of P, K, Ca and Mg in the roots decrease throughout fruit development; in well-managed crops, the effect of the high fruit load on the concentrations of N, P, K, Ca and Mg in mature leaves is small.