Elements in leaves of a trembling aspen clone by crown position and season

Authors

Elon S. Verry
D. R. Timmons

Document Type

Article

Journal/Book Title/Conference

Canadian Journal of Forest Research

Volume

6

Issue

3

First Page

436

Last Page

440

Publication Date

1976

Abstract

Concentrations of N, Ca, K, P, Mg, Na, Zn, Mn, Fe, Al, B, and Cu were determined in the leaves of a 43-year-old stand of Populustremuloides Michx. by upper, middle, and lower crown positions and for seven sampling dates over the growing season. Concentrations of Ca and K in the upper third crown position were consistently lower than those in either the middle or lower third positions by an average of 0.19 and 0.20% ovendry weight, respectively. Concentrations of Mg and Na remained constant over time; concentrations of N, K, and P continually decreased over time; and minor elements showed a net increase over the growing season with an intermediate peak on June 30. Suggestions for sampling schemes are given.

Recommended Citation

Verry, E. S.; Timmons, D. R. 1976. Elements in leaves of a trembling aspen clone by crown position and season. Canadian Journal of Forest Research. 6(3): 436-440.