tailieunhanh - Báo cáo lâm nghiệp: "Soil characteristics under selected broadleaved tree species in East Norwa"

Tuyển tập những bài báo cáo nghiên cứu khoa học hay nhất được đăng trên tạp chí JOURNAL OF FOREST SCIENCE đề tài: Soil characteristics under selected broadleaved tree species in East Norway. | JOURNAL OF FOREST SCIENCE 56 2010 7 295-306 Soil characteristics under selected broadleaved tree species in East Norway K. Rejsek1 O. Haveraaen2 a. Sandnes3 K. Somerlíková4 -Faculty of Forestry and Wood Technology Mendel University in Brno Brno Czech Republic Norwegian University of Life Science Ảs Norway Department of Forest- and Natural Resource Policy Ministery of Agriculture and Food Oslo Norway Faculty of Regional Development and International Studies Mendel University in Brno Brno Czech Republic ABSTRACT Comprehensive analyses of soil properties of sites of native Scandinavian broadleaved tree species were performed in 36 habitats in East Norway. The material consisted of stands of silver birch Betulapendula Roth. white birch Betula pubescens Ehrh. black alder Alnus glutinosa Gaertn. speckled alder Alnus incana Moench. European ash Fraxinus excelsior L. pedunculate oak Quercus robur L. and sessile oak Quercuspetraea Matt. Liebl. . The main objective was to describe the vertical characteristics and variations in some selected soil variables of the soil profiles. Particular soil horizons of 15 Brunisolic soils 11 Regosolic soils 6 Gleysolic and 4 Podzolic were sampled and analyzed for soil texture bulk density specific density porosity oxidizable carbon total nitrogen content pH in water exchangeable acidity exchangeable cations and anions Mg Ca Mn Al S Fe B P and K cation exchange capacity and base saturation. No regular patterns were found in selected soil properties when tested between various soil units in silver birch stands. Furthermore silver birch stands were found on sites which topsoil i significantly differed in their cation exchange capacities ii did not differ significantly in their pH values and iii mostly differed in their clay contents and iv mostly did not differ in BS. Differences among the Humic Regosols Luvic Gleysols Sombric Brunisols Eutric Brunisols and Humo-Ferric Podzols for silver birch stands in their topmost horizons of humified .