Scots pine (P. sylvestris L.) wood moisture and sapwood ratio on different forest site types
2002
Kask, R. | Pikk, J. | Kuusepuu, T. (Estonian Agricultural University, Tartu (Estonia). Department of Forest Management)
The relationship between pine wood physical properties and tree characteristics were studied. One hundred and sixty model trees were felled from 21 different pine stands. Blocks of stem were cut as samples at breast height, half of tree height and 3/4 of tree height. Wood moisture content and sapwood ratio were determined. Correlation and regression analysis were used to test for significant relationship between tree and site type characteristics and sapwood area. There is more wood moisture in pines growing on peatlands than in those growing on Vaccinium vitis-idaea or Myrtillus site types. On peatlands, heartwood moisture content in pines is higher at half of tree height than at breast height. Sapwood moisture content is higher on the south side of the stem than on the north side. This difference is great in the crown part of the stem. A close correlation was observed between sapwood ratio and stand quality class and age. The correlation between sapwood ratio and tree crown volume is moderate
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