The Distribution of Elements in ‘Elberta’ Peach Tree Tissues and the Influence of Potassium and Magnesium Fertilization1

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Abstract
Concentration of elements varied widely in different portions of peach trees. Levels of N, P, K, and Zn in the fruit were similar to foliar levels while Cu, Fe, Mn, and especially Mg and Ca were much lower than foliar levels. Concentrations of Ca and Zn in the twigs were similar to those in the foliage. Levels of other elements in the twigs were lower than in the foliage. The lowest concentration of each element except Ca was in the trunk and branches. Concentration of P in the roots was near that of the foliage, while most of the other elements were more abundant in the roots than in the trunk and branches, but less so than in the above ground active metabolic tissue. Application of either K or Mg increased the concentration in the foliage of the element applied. Antagonistic influence between these 2 elements occurred in the foliage, but not in other tissues. Application of either K or Mg depressed levels of Ca in most portions of the tree. Application of K increased and Mg decreased Mn levels in most portions of the tree. The influence of treatments upon the concentration of other micronutrients was not clear and was usually limited to specific tissue.

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