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Stratification of Shortleaf Pine Seeds

Tests with 16 separate lots of shortleaf pine (Pinus echinata Mill.) seeds, representing various sources and years of collection, indicate that the greatest increase in speed of germination occurred after stratification for 56 to 70 days. Stratification increased total germination over that of the control, but there were no differences between treatments for periods of from 14 to 84 days. Since shortleaf pine (Pinus echinata Mill.) seeds are usually dormant, cold stratification for 30 to 60 days has been recommended for prompt, complete germination (2, 7, 8). These recommendations were based on completeness rather than speed of germination. Seidel (6), on the other hand, working with a single seed lot, found that germination speed increased progressively with lengths of stratification up to 60 days. This paper reports speed and completeness of germination after stratifying seeds of varying ages for periods from 14 to 84 days.


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Author(s): James P. Barnett, John M. McGilvray

Publication: Tree Planters' Notes - Volume 22, Number 3 (1971)

Volume: 22

Number: 3