Proceedings of Past Forest Nursery Association Meetings:
|Target Seedling Specifications: Are Stocktype Designations Useful?
|Owston, Peyton W.
|1990: Roseburg, OR
|A stocktype designation identifies a seedling’s age and the
basic method by which it was produced. The designation
inexactly implies seedlings’ relative size and conveys very
little information about their critically important physiological condition. Although designations for the primary
types of seedlings have not changed much over the years,
size and quality of most types have been improved significantly. Comparisons of field performance in the Pacific
Northwest indicate that survival is often not greatly different whether a seedling was produced in a container, in a
bareroot seedbed, or had been transplanted. On the other
hand, seedling height after three to five years in the field
tends to be somewhat greater for stocktypes that usually
consist of larger seedlings; increased growth probably
relates more to initial seedling size than to seedling age
and production method. For most sites and situations,
foresters should prescribe seedlings of the size and physiological condition that are most appropriate ecologically
and economically. Nursery managers should use the cultural and economic options available to them to meet
those client needs. Choosing the type of seedling to produce is just one of the decisions to be made in accomplishing that goal.
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