tailieunhanh - Báo cáo khoa học: " Early growth performance of salal (Gaultheria shallon) from various North American west-coast locations"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế đề tài: Early growth performance of salal (Gaultheria shallon) from various North American west-coast locations. | Ann. For. Sci. 58 2001 597-606 INRA EDP Sciences 2001 597 Original article Early growth performance of salal Gaultheria shallon from various North American west-coast locations Charles E. Dorwortha Thomas N. Sieberb and Thomas A. D. Woodsc a BioCon Technology International 212 Sunset Drive Salt Spring Island B. C. V8K 1L4 Canada b Swiss Federal Institute of Technology Forest and Wood Sciences Section of Forest Protection and Dendrology ETH-Zentrum 8092 Zurich Switzerland c Forest Renewal B. C. 727 Fisgard Street Victoria B. C. V8V 1X4 Canada Received 25 May 2000 accepted 8 March 2001 Abstract - Salal is a native perennial evergreen shrub occurring from the panhandle of Alaska along the entire coast of British Columbia to southern California. In the North American west coast industrial forest it is considered a weed because it is a persistent serious competitor with coniferous species. Intraspecific genotypic and phenotypic diversity of salal is not well known despite of its ecological and economic significance. A morphometric analyses within and among populations was performed in a statistically appropriate manner. Two-year-old container grown seedlings of 24 collections of salal from throughout the natural area of distribution in western North America were planted in a randomized complete blocks design 6 blocks on a cleared ha plot on Vancouver Island. Each of the 24 seedlots was planted once in each block with 24 plants per seedlot in April 1990. Shoot height and the number of buds prior to planting the plant spatial volume product of plant height and plant width on two perpendicular axes in 1992 and 1993 the relative growth increment 1992-1993 and the number of dead plants in 1992 and 1993 were subjected to analysis of variance. No differences among seedlots were detected for the relative growth increment and the number of dead plants in 1992 and 1993. Conversely shoot height and the number of buds prior to planting as well as the plant volume in 1992 and .