Changes in the intensity of heartwood formation in Scots pine (Pinus sylvestris L.) ontogenesis in three forest types in the middle taiga subzone
Galibina, Nataliya et al. (2022), Changes in the intensity of heartwood formation in Scots pine (Pinus sylvestris L.) ontogenesis in three forest types in the middle taiga subzone, Dryad, Dataset, https://doi.org/10.5061/dryad.prr4xgxnw
An essential stage in woody plant ontogeny – heartwood (HW) formation – determines tree resistance to weather conditions, wood quality (moisture, colour, resistance to biodegradation), and regulates the proportion of functionally active sapwood (SW) in the total trunk biomass. In this study, the patterns of HW formation depending on tree age and cambial age within the same tree were studied in the North-West of Russia in Scots pine in different forest types. In each sample plot, we selected five dominant trees (model trees), from which we took cores at different trunk heights (0.3, 1.5, 4.5, 7.5 and 10.5 m). The cores were treated with 2,6-dichlorophenolindophenol to identify the heartwood zone. The number of annual rings in the xylem, the number of annual rings in HW and SW, radial width in sap- and heartwood were estimated on each core. The sap- and heartwood area was calculated based on the data obtained.
Russian Science Foundation, Award: 21-14-00204