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Eight Year Results of Slash and Loblolly Pine Provenance Tests in China

Seeds of loblolly and slash pine were obtained from natural range of the species in the US (loblolly pine, 10 states; slash pine, 6 states). Provenance tests were carried out in 7 locations (latitude range from 21.9-31.8 N) in China in 1981. There was significant variation among different seed sources of loblolly pine in 8-year height, diameter and volume growth. Significant positive correlations were found between growth and mean annual temperature, mean minimum temperature of January, rainfall of June-September, and frost free season; a significant negative correlation was found between growth and latitude. The interaction of seed sources by locations were highly significant for height and volume growth. The best seed sources in southern and central subtropical regions of China were from the coastal regions of Florida, South Carolina, and Louisiana (Livingston). For the northern subtropical region of China, the piedmont or inland seed sources were better than the coastal seed sources due to greater cold tolerance.

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Author(s): P. Zhigang

Publication: Tree Improvement and Genetics - Southern Forest Tree Improvement Conference - 1989

Section: Concurrent Session 3A