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Black Poplar (Populus nigra L.) Wood Density Variation With Tree Planting Spacing | ||
| Journal of Tikrit University For Agriculture Sciences | ||
| Article 1, Volume 15, Issue 3, 2015, Pages 14-18 | ||
| Author | ||
| Younis H. Suleman | ||
| Abstract | ||
| Twelve (eight-year-old) trees of black poplar (Populus nigra L.) were planted at three different spacing, (2.00 X 3.00 meters, 2.50 X 3.50 meters, and 3.00 X 4.00 meters). Samples at three different heights; 1.3 meters (DBH), 2.8 meters, and 4.3 meters, were taken from each tree to determine the variation of the wood density with planting spacing change between trees. The results showed a (4%) difference in wood density with each (0.50 X 0.50 meter) decrease in planting spacing. The mean wood density of poplar trees was (0.45 g cm-3) at (3.00 X 4.00 meter) spacing. The density increased to (0.47 g cm-3) at (2.50 X 3.50 meter) spacing and to (0.489 g cm-3) at (2.00 X 3.00 meter) spacing.The density was varied from the pith of the trees outside to the bark and did not show strong relationship to the position on the stem; near pith, intermediate between pith and bark, and near the bark or to the height of the tree. | ||
| Keywords | ||
| black poplar; Populus nigra | ||
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