Nodulating associations among rhizobia and legumes of the genus Glycine subgenus Glucine |
| |
Authors: | Pueppke S G |
| |
Institution: | (1) Environmental Studies Program, Dartmouth College, 103A Nathan Smith Building, 03755 Hanover, NH, USA;(2) School of Natural Resources, Aiken Center, Univ. of Vermont, 05406 Burlington, VT, USA;(3) USDA Forest Service, P.O. Box 968, 05402 Burlington, VT, USA |
| |
Abstract: | Current and one-year-old foliage was collected from sixty-five red spruce trees growing in thirteen stands at different elevations
in the Green Mountains of Vermont and Adirondacks of New York. Sample trees were randomly selected from visually healthy trees
at each site. Foliage was analyzed for major and minor elements. In July 1984, foliar Ca, Mg, and Zn concentrations were significantly
greater at low than at high elevations. In October 1984, Ca, Mg, and Zn concentrations were higher at low elevations and Ca
and Mg concentrations varied significantly among locations within elevational groups. Nitrogen concentration was significantly
higher in the high-elevation group in July but not in October. The average red spruce foliar Mg concentration at the end of
the growing season in the high elevation stands (442 mg kg−1) is much lower than values reported for other mature red spruce stands in the eastern United States. |
| |
Keywords: | foliar chemistry forest tree nutrition red spruce |
本文献已被 SpringerLink 等数据库收录! |
|