Abstract
Abstract Field trials with black spruce and jack pine were established in boreal Ontario to evaluate the effect of stock type and planting date on plantation performance. Black spruce stock types included FH408 Japanese paperpots, 3 + 0 seedlings and 1.5 + 1.5 transplants. Jack pine stock types included FH408 Japanese paperpots, Ontario Tubes, and 2 + 0 seedlings. Both species were planted during the traditional spring planting season (May-June) as well as in July. Field performance i.e., survival and growth) of black spruce planted in May as FH408 paperpots and 1 5 + 1.5 transplants and in July as paperpots was satisfactory. Jack pine planted in June as paperpots and 2 + 0 seedlings also performed satisfactorily. Although the relative differences in growth among treatments tended to diminish for both species over the study period, some stock-type and planting-date differences were still evident 10 years after planting. North. J. Appl. For. 7:175-179, December 1990.
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