Presowing Treatments Affect Shortleaf Pine Seed Germination and Seedling Development
Two experiments using 6 half-sib families of skortleaf pine (Pinus echinata Mill.) were conducted to provide better information on seed stratification needs. Results from laboratory and nursery germination tests and evaluations of seedling development in the nursery indicate that stratification for 15 days was adequate when germination conditions were nearly ideal. However, results from the studies indicate that the speed of germination was much slower when germination temperatures and daylengths were lower than optimum. Under these conditions, 45 days of stratification were needed to achieve uniform rates of germination. The more adverse the germination conditions were, the more important it was that stratification was longer. Seeds that germinated early produced larger stock than those that germinated later. Predictions of seed germination in nurseries can be improved by determining the typical environmental conditions at the time of sowing and by requesting that germination tests be conducted under corresponding conditions. Tree Planters' Notes 44(2):58-62; 1993.
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Author(s): James P. Barnett
Publication: Tree Planters' Notes - Volumes 44, Number 2 (1993)
Section: Peer-Reviewed
Volume: 44
Number: 2
