Chemical Analysis of Sugar Maple Sap and Foliage as Related to Sap and Sugar Yields
Abstract:Relating sap and sugar yields of Acer saccharum Marsh., to sap and foliage nutrient composition has indicated that: (1) sugar yield per tree may be significantly predicted from dbh and sugar concentration; (2) sap nutrient composition changes within the flow season; (3) sugar and nutrient levels in mid-season sap differ primarily between high and low sugar producing trees; (4) relations between sun and shade foliage ash and P concentrations differ significantly among trees of various sugar yields, (5) young sun foliage ash concentrations and contents, and N, K and Ca contents differ significantly among trees of various sugar yields; and (6) P concentrations of sun foliage just prior to leaf-fall differ significantly among trees of various sugar yield. Significant relations of sugar yield to foliage N, P, K and Ca levels may indicate relationships between winter-stored nutrients, initial spring growth, energy transformations concerned with the sugar-starch-sugar cycle, and foliage nutrient element composition.
Document Type: Journal Article
Affiliations: Research Assistant in Soils, Univ. of Wisconsin, Madison, Wis.
Publication date: September 1, 1964
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