SULFUR UPTAKE AND NUTRIENT COMPOSITION OF PRUNE TREES AS AFFECTED BY SULFUR APPLICATION

One year-old trees of Marianna 2624 (Prunus cerasifera X P. munsoniana ), grafted with French prunes (P. domestica) were grown in the greenho use in pots containing vermiculite and supplied with graded amounts of sulfate-sulfur (SO4-S) to study the sulfur (S) distribution in the tr ees and elemental composition as affected by S additions. Leaf, stem, bark, wood, and root samples were analyzed for different S fractions. Tissue nitrogen (N), phosphorus (P), and boron (B) concentrations decr eased with S application, and that of potassium (K) and iron (Fe) were increased. Roots and leaves contained higher concentrations of S than the other tissues. Sulfur concentrations increased with the shoot hei ght.