Variation of leaf nutrition status in relation to fruit growth in mango
1999
Oosthuyse, S.A.(Hort Research SA, Tzanee (South Africa). P.O. Box 3849)
During each of the months of October, November and December 1996 and January 1997, leaves on fruit bearing terminal shoots on 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. The variation in Ca, K, N and Mn was most marked, Mg and P varied very little. The results indicate that leaf nutrient concentrations are generally undergoing flux during the month of November, when the fruits are expanding rapidly. The month of November might thus not be ideal for taking leaf samples for analysis.
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