Relationship between jack pine growth and site variables in New Brunswick plantations

Autor:	W. N. Hamilton, H. H. Krause
Rok vydání:	1985
Předmět:	Forest floor Global and Planetary Change Ecology Phosphorus chemistry.chemical_element Forestry Nitrogen Bulk density Jack pine Agronomy chemistry Site occupancy Total nitrogen Environmental science Drainage
Zdroj:	Canadian Journal of Forest Research. 15:922-926
ISSN:	1208-6037 0045-5067
DOI:	10.1139/x85-148
Popis:	Mean and dominant tree heights were determined on 28 sample plots within 18 jack pine (Pinusbanksiana Lamb.) plantations varying in age from 6 to 16 years. An average dominant tree was removed from each plot for stem analysis. The height versus age data were used to determine 2-, 3- and 4-year growth intercepts in each sample tree. Growth intercepts were positively correlated with foliar concentrations of nitrogen, phosphorus, and potassium, total nitrogen concentration in the main rooting layer of the mineral soil, as well as soil physical parameters associated with good drainage. Depth of forest floor and Ae horizon, clay content, bulk density, and drainage class were negatively correlated with growth. Close correlations were also revealed for site occupancy by ericaceous ground cover species and growth intercepts. The numerous site variables included in this study were reduced to five factors with significance to jack pine growth: (i) ericaceous cover – forest floor, (ii) drainage, (iii) extractable P, (iv) exchangeable K, and (v) Ae horizon development.
Databáze:	OpenAIRE
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