Effects of Rough Handling on Early Performance of White Pine and White Spruce Seedlings
This study examined the effect on seedling health of dropping standard plastic-lined kraft tree bags containing 3+0 white pine (Pinus strobus L.) and white spruce (Picea glauca (Moench) Voss) seedlings from various heights; timing of irrigation after planting was also tested for its effect on seedling vigor. Treatments were evaluated by measuring root growth potential (RGP), and bud flush was assessed at the end of a 3-week period to evaluate its use in predicting stress on seedling performance. White pine seedlings showed a decrease in RGP at every treatment height, but white spruce showed a decrease in RGP at 2 m (the greatest drop distance) only. Irrigating did not increase RGP for either species, although white spruce seedlings exhibited higher RGP than white pine after irrigation. Although irrigation did not affect bud flush in white pine when dropped from 2 m, the percentage of buds that broke dormancy was significantly decreased (P < 0.05). For white spruce seedlings, a downward trend was evident with increasing drop heights, but there was no significant difference at 2 m. Tree Planters' Notes 45(4):142-146; 1994.
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Author(s): Ipi Yuyitung, James A. Simpson, Andrew M. Gordon
Publication: Tree Planters' Notes - Volumes 45, Number 4 (1994)
Section: Peer Reviewed and Refereed Articles
Volume: 45
Number: 4
