Performance of loblolly and slash pine nursery selections

Abstract

Select loblolly pine seedlings averaging 126 percent taller than controls at planting were 10.8 ft or 45 percent taller than controls at age 10, and total stem-wood volume of the average selected tree was 3.4 times greater than controls. Select slash pine seedlings with an initial superiority of 104 percent over the controls were 5.2 ft or 20 percent taller than controls at age 10, and the total stem-wood volume of the average select tree was 1.8 times greater than controls. Select loblolly and slash trees had less within-plot variation in diameter and height at age 10 than did their controls. The control loblolly had more variation in height than did the control slash, but the selects of the two species had comparable variation. Select trees in comparison with controls did not show significant differences with respect to percent infection from fusiform rust, stem forking, cone production, or seedling survival, but select loblolly stems had significantly more sweep than control loblolly.

Citation

Hatchell, Glyndon E.; Dorman, Keith W.; Langdon, O. Gordon. 1972. Performance of loblolly and slash pine nursery selections. Forest Science. 18(4): 308-313.