(DOWNLOAD) "Wood Density in Pinus Taeda X Pinus Rigida and Response 10 Years After Thinning in Virginia." by Forest Products Journal ~ eBook PDF Kindle ePub Free
eBook details
- Title: Wood Density in Pinus Taeda X Pinus Rigida and Response 10 Years After Thinning in Virginia.
- Author : Forest Products Journal
- Release Date : January 01, 2007
- Genre: Business & Personal Finance,Books,
- Pages : * pages
- Size : 259 KB
Description
Abstract The purpose of this study was to examine the differences between wood density of loblolly pine and selected pitch pine X loblolly pine crosses, differences in density of the different pitch pine X loblolly pine crosses, and to examine the effect of thinning on the hybrid crosses. 153 trees were sampled, including 17 loblolly pines and 136 pitch pine X loblolly pine hybrids grown in the Piedmont of Virginia (USA). The hybrid pines sampled included trees from 16 different crosses released at four different levels based on the free to grow (FTG) value: C = FTG 2, L = FTG 2 to 4, M = FTG 4 to 6, H = FTG 6. There was a significant difference between the wood density of the hybrid crosses and the loblolly pine (p = 0.0428). It was also found that there were significant differences between the crosses. The densities ranged from 483 kg/[m.sup.3] to 555 kg/[m.sup.3], with significant differences between many of the crosses (p = 0.007). These differences were associated with significant differences in the percentage of latewood produced (p = 0.015). The correlation between latewood percentage and wood density was calculated to be r = 0.825. Trees released at a FTG 6 were significantly less dense than the other release rates (p = 0.007); the difference was related to the percentage of latewood, which was also significantly different (p = 0.004). This study indicates that the wood density of pitch pine X loblolly pine hybrids is high enough with in crosses with low density and a FTG value 6 to produce wood similar to loblolly pine grown in the Piedmont of Virginia.
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