%0 Research article
%T Identifying heartwood-rich stands or stems of Pinus sylvestris by using inventory data
%A Björklund, Lars
%D 1999
%J Silva Fennica
%V 33
%N 2
%R doi:10.14214/sf.662
%U https://silvafennica.fi/article/662
%X Variations in heartwood percentage, heartwood radius and sapwood width,  within and between stands of Scots pine (Pinus sylvestris L.), were  analysed using a database of 198 CT-scanned (computer tomography) stems  from 33 research plots (stands) throughout Sweden. Heartwood percentage  varied greatly both between individual trees and between stands, and  correlated poorly to site, stand and tree variables. This implies that  it seems unfeasible to identify heartwood-rich stands or stems, e.g.,  for production of heartwood products, by using inventory data. Heartwood  formation expressed as the number of new heartwood rings formed each  year was found to increase with increasing cambial age, from about 0.5  rings per year at a cambial age of 45 years, to about 0.8 rings per year  at a cambial age of 115 years.