Effect of N, P, and K Fertilization on Yield and Sugar Content of Sap of Sugar Maple Trees1
- Kenneth G. Watterston,
- Albert L. Leaf and
- John H. Engelken2
Sap yield, sap sugar concentration, and sugar yield data from sugar maple trees collected over 3 years revealed great intra- and interseasonal variations. The effect of N, P, and K fertilizers, applied singly and in combination, affected the yield of sugar by affecting sap yield and/or sap sugar concentration. The combination fertilizer depressed sugar yield the first sap flow season after treatment and increased this yield in the second season. The N or K fertilizer resulted in little change in sugar yield over the control trees while P fertilizer produced a significant effect on sap sugar concentration, thus affecting sugar yield.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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