Proveniance Test of 12-year-old Slash and Loblolly Pine

Provenance test of 12-year-ole slash and loblolly pine at 7 locations were conducted.Results indicate that there are significant variations among different provenances of lobiolly pine as well as the interaction of provenance×location,though the variance of the interaction is small.L-9,6,10 from the coastal plains of South Atlantic States and Gulf of Mexico(Livingston,Parish,LA) were selected as the superior seed sources for the central and southern subtropical region,according to the growth(height,dbh.) and adaptation (stirvival,pest and cold-resistance) of the provenance performance,L-2,5,6 from coastal plain of NC,SC and inland piedmont are fast growing and cold-resistant.They could be used for the cultivation in northern subtropical region.There is less significant variation among the seed sources of slash pine and the interaction of provenance×location is not significant.The superior seed sources of slash pine could be obtained from the central range of Southern Georgia and northern Florida.Slash and loblolly pine should be cultivated below 400～500 m in the vast low hills and coastal plain of the subtropical regions.Native masson pine could be planted at the places where the elevation is higher than 400～500 m.