Chemical Analysis of Sugar Maple Sap and Foliage as Related to Sap and Sugar Yields
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.
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Document Type: Journal Article
Affiliations: Research Assistant in Soils, Univ. of Wisconsin, Madison, Wis.
Publication date: 1964-09-01
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