tailieunhanh - Báo cáo lâm nghiệp: "Comparison of general tree characteristics of less known oak species Quercus dalechampii Ten. and Quercus polycarpa Schur"

Tuyển tập những bài báo cáo nghiên cứu khoa học hay nhất được đăng trên tạp chí JOURNAL OF FOREST SCIENCE đề tài: Comparison of general tree characteristics of less known oak species Quercus dalechampii Ten. and Quercus polycarpa Schur. | JOURNAL OF FOREST SCIENCE 54 2008 8 333-339 Comparison of general tree characteristics of less known oak species Quercus dalechampii Ten. and Quercus polycarpa Schur R. Matula Faculty of Forestry and Wood Technology Mendel University of Agriculture and Forestry in Brno Brno Czech Republic ABSTRACT This study was designed to evaluate basic tree characteristics of Quercus dalechampii Ten. and Quercus polycarpa Schur and to find out differences between them. Total height height of crown base and diameter at breast height were measured before tree felling. Cut stems were visually checked for heart rot on their basal parts. Diameters were measured on each stem in 1 meter long sections from the base to the point of life crown setting. Average values for both species were compared by t-test. The total height was proved to be statistically different the height of crown base and diameter at breast height were quite similar for both species. Q. dalechampii Ten. was proved to be of larger stem diameter from the tree foot to the 3rd height meter the diameter of Q. polycarpa Schur was superior from that height upwards. However the most significant interspecies difference was found in a number of stems affected by wood-rot fungi as Q. polycarpa Schur turned out to be less resistant than Q. dalechampii Ten. Keywords Quercuspolycarpa Schur Quercus dalechampii Ten. dry rot stem characteristics Quercuspolycarpa Schur and Quercus dalechampii Ten. are two similar oak species which belong to the Quercus petraea species aggregate. They have been described by several authors as separate species Schwarz 1936 Matyas 1971 Pozgaj Horváthová 1986 Dostál 1989 Koblizek 1990 Jovanovic 2000 Magic 1974 2006 . Although they both occur over a large area of Europe there is still only limited information on them in most parts of this area. The centre of distribution of both species is situated in south-eastern Europe in particular in the Balkan Peninsula. The area of their distribution extends to the