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Proceedings of Past Forest Nursery Association Meetings:

Short Day Exposure to Induce Budset Prolongs Shoot Growth in the Following Year
Odlum, Kerry D.; Colombo, Stephen J.
1988: Vernon, CAN
Short day exposure applied in the greenhouse prior to overwintering container black spruce (Picea mariana [Mill.) B.S.P.) seedlings dramatically influenced the timing and duration of shoot growth in the first year after outplanting. When compared with seedlings grown under natural daylength bud initiation regimes in the year prior to planting, short daylength seedlings flushed sooner in the spring and set bud later at the end of the growing season, resulting in greater shoot growth. The extended duration of shoot growth in SD seedlings is expected to place them at greater risk of damage from both late spring and early fall frosts.
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