Abstract
Site index (SI) curves for H20 (dominant height at 20 years total age) were constructed for hybrid larch (Larix × eurolepis Henry) growing in 26 stands on former farmland in southern and central Sweden (Latitude 56–60° N.). The mean total age of the stands was 23 ± 10 (range 17–49) years; the mean diameter at breast height (ob) was 16 (7–34) cm; the mean height was 14 (8–29) m; and the stands had a mean density of 993 (266–2195) stems ha−1. A model derived by Cieszewski (2001) performed best for the data. The model explained 99% of the observed variation in height development. No apparent bias across the range of predicted site indices was found. SI was examined in relation to soil types. Multiple samples were available for three soil types: light clay, medium clay and till. There were no significant differences between these soil types with respect to the choice of SI curve.
Highlights
Larch is an important species in the boreal forest
The objective of this paper is to present Site index (SI) curves for young hybrid larch growing on former farmland in Sweden
Parameter estimates for models 1–3 were determined on the basis of the data set (Table 2)
Summary
Larch is an important species in the boreal forest. Most larch forests are found in the Northern hemisphere, and they are most widely distributed in Siberia and Canada [1]. Of the 16 larch species that exist, European larch (Larix decidua Miller) and Siberian larch (Larix siberica Ledeb) are the main species in Sweden, Siberian larch is the only indigenous larch species in the country. European larch was introduced in the 18th century [2]. Larch plantations cover only small areas, Forests 2012, 3 representing
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