Variation of leaf nutrition status in relation to fruit growth in mango.
Oosthuyse S. A.
Author Affiliation: HortResearch SA, P.O. Box 3849, Tzaneen 0850, South Africa.
Yearbook - South African Mango Growers' Association 17 : 25-28
Abstract : During October, November and December 1996 and January 1997, leaves from fruit bearing terminal shoots of trees of the mango cultivars Zill, Tommy Atkins, Sensation, Heidi and Kent were taken for analysis. N, P, K, Ca, Mg, Cu, Fe, Mn and Zn leaf concentrations were determined. Leaf N, K, Ca, Mn, Fe, Cu and Zn concentrations generally increased during the rapid phase of fruit growth, and generally decreased during the later stages of fruit development. Variation in the concentrations of Ca, K, N and Mn was very marked; Mg and P varied little. Leaf nutrient concentrations generally undergo flux during November when fruits are expanding rapidly. November might not be ideal for taking leaf samples for analysis.