ISHS Acta Horticulturae 56: Symposium on Juvenility in Woody Perennials
ACCELERATING MATURITY IN PICEA SEEDLINGS |
| Authors: | E. Young, James W. Hanover |
| Abstract:
When several species and interspecific hybrids of spruce (Picea) were grown from seed under a 24-hour photoperiod with optimal temperature, moisture, and nutrient levels they did not enter dormancy, but exhibited a continuous and vigorous free growth. This "accelerated- optimal-growth" treatment shortened the juvenile period and promoted precocious flowering after out-planting. The seedlings also demonstrated a more rapid or mature growth rate after outplanting at an earlier age than naturally-grown spruce. Picea pungens seedlings grown initially under natural conditions did not respond to the extended photoperiod treatment after reaching three or more years of age. | |
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