Seed and Seedling Size Grading of Splash Pine Has Little Effect on Long-Term Growth of Trees
Seeds from approximately 25 slash pine (Pinus elliottii Engelm. var. elliottii) trees were bulked, separated into three size classes, and planted in the nursery. Seedlings from each size class were graded into small, medium, and large size classes, and the resulting nine treatment combinations were planted in a randomized-block field design. Seed size had no significant effect on heights at outplanting (1 year from seed) or at three measurement ages (3, 10, and 15 years from outplanting) but did significantly affect survival and thus volume per plot at age 15. Seedling size affected heights at age 3 but the effect did not persist to ages 10 and 15 years. The only evidence of interaction between seed size and seedling size was for height and survival at age 3 years. Genetic identity in the study materials was not retained and may have masked the effects of seed and seedling size. Size grading of seeds or seedlings to control variation in long-term growth seems unnecessary for slash pine. Tree Planters' Notes 42(3) :23-27;1991.
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Author(s): Earl R. Sluder
Publication: Tree Planters' Notes - Volumes 42, Number 3 (1991)
Section: Peer-Reviewed Articles
Volume: 42
Number: 3
