Site Index Curves for Young Hybrid Larch Growing on Former Farmland in Sweden

Forests

关键词: farmland;    hybrid larch;    Larix × eurolepis Henry;    site index;    soil types;    top height;    total age;   

DOI  :  10.3390/f3030723

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2012 by the authors; licensee MDPI, Basel, Switzerland.