Juvenile Performance of Exotic Larches in Central Wisconsin
A permanent test plantation consisting of a single provenance of Japanese larch and six provenances of European larch was established in central Wisconsin in the spring of 1982 by hand planting 2-0 stock grown from seed originating in Europe. A randomized complete block design with seven replications was used. Altogether 294 trees (6 trees/plot X *** plots/block x 7 replications) were installed in the test. After five growing seasons in the field, plantation survival was 98%. Nineteen percent of the trees had suffered bark damage by deer, and 22% had terminals clipped by grasshoppers. The damages were not related to seed source origin, and they were of short duration. The between-seedlot differences in annual shoot elongation were statistically significant in each of three consecutive growing seasons. Mean annual height growth for both exotic larches combined was 53 cm. Mean total height reached 3.73 m after seven growing seasons (two in the nursery, five in the plantation). Early growth potential of both larches was more than three times that of native red pine planted adjacent to the larch study site. Although the single Japanese larch provenance was slowest growing, sensitive to late frost, and possessed the lowest percentage of straight stems, it still outperformed red pine. European larch of Polish provenances, combining good growth with straightness characteristics, is recommended for general planting purposes on suitable sites in central Wisconsin. North. J. Appl. For. 6(1):31-33, March 1989.
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Document Type: Journal Article
Affiliations: College of Natural Resources, University of Wisconsin, Stevens Point, WI 54481
Publication date: 1989-03-01
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