Abstract
This work presents the results of selected wood properties in birch trees grown on a provenance experiment plot established as a seed orchard. The study concerned: basic density, oven-dry density and compression strength along the grain at a moisture content of 0% and at moisture content above fiber saturation point. Analyses were performed on 971 wood samples collected from 28 trees at the level of breast height. It was found high variability for diameter of breast height (22%) and relatively low for basic density (9%) and oven-dry density (11%). Average basic density was 446.5 kg . m -3 and average oven-dry density was 537.9 kg . m -3 . The compression strength at 0% moisture content was four times higher (65 MPa) than the strength at moisture content above the fiber saturation point (16.6 MPa). Most of clones had similar properties within the limits of statistical errors, but a few clones exhibited statistically significant low value.
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Claims 8
Claim · model-written summary
Diameter at breast height showed high variability (22%) among the birch trees.
Verbatim
e1“birch trees grown on a provenance experiment plot established as a seed orchard”
e2“It was found high variability for diameter of breast height (22%)”
Claim · model-written summary
Basic density showed relatively low variability (9%) among the birch trees.
Verbatim
e1“birch trees grown on a provenance experiment plot established as a seed orchard”
e2“relatively low for basic density (9%)”
Claim · model-written summary
Oven-dry density showed relatively low variability (11%) among the birch trees.
Verbatim
e1“birch trees grown on a provenance experiment plot established as a seed orchard”
e2“relatively low for basic density (9%) and oven-dry density (11%)”
Claim · model-written summary
Average basic density of the birch trees was 446.5 kg . m -3.
Verbatim
e1“birch trees grown on a provenance experiment plot established as a seed orchard”
e3“Average basic density was 446.5 kg . m -3”
Claim · model-written summary
Average oven-dry density of the birch trees was 537.9 kg . m -3.
Verbatim
e1“birch trees grown on a provenance experiment plot established as a seed orchard”
e4“average oven-dry density was 537.9 kg . m -3”
Claim · model-written summary
Compression strength at 0% moisture content was four times higher (65 MPa) than above the fiber saturation point (16.6 MPa) in birch wood.
Verbatim
e1“birch trees grown on a provenance experiment plot established as a seed orchard”
e5“The compression strength at 0% moisture content was four times higher (65 MPa) than the strength at moisture content above the fiber saturation point (16.6 MPa)”
Claim · model-written summary
Most birch clones had similar properties, within the limits of statistical errors.
Verbatim
e1“birch trees grown on a provenance experiment plot established as a seed orchard”
e6“Most of clones had similar properties within the limits of statistical errors”
Claim · model-written summary
A few birch clones exhibited a statistically significant low value.
Verbatim
e1“birch trees grown on a provenance experiment plot established as a seed orchard”
e7“a few clones exhibited statistically significant low value”