tailieunhanh - Báo cáo lâm nghiệp: "Effects of spruce, beech and mixed commercial stand on humus conditions of forest soils"

Tham khảo luận văn - đề án 'báo cáo lâm nghiệp: "effects of spruce, beech and mixed commercial stand on humus conditions of forest soils"', luận văn - báo cáo phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | JOURNAL OF FOREST SCIENCE 55 2009 3 119-126 Effects of spruce beech and mixed commercial stand on humus conditions of forest soils T. Fabianek1 L. Mensik1 I. Tomásková2 J. Kulhavý1 1Institute of Forest Ecology Faculty of Forestry and Wood Technology Mendel University of Agriculture and Forestry in Brno Brno Czech Republic Laboratory of Plants Ecological Physiology of Systems Biology and Ecology Academy of Sciences of the Czech Republic Brno Czech Republic ABSTRACT A pedological survey was carried out in a spruce monoculture beech stand and in a mixed stand at a field research station in Rájec-Nèmcice of the Institute of Forest Ecology IFE Mendel University of Agriculture and Forestry MUAF in Brno in the region of the Drahanská Upland in 2004-2006. The aim of the paper was to evaluate i humus reserves and forms ii soil reaction ill reserves of total carbon and nitrogen for the forest floor layers and iv carbon nitrogen ratio. Soil analyses were carried out on samples taken at the end of the growing season in a spruce beech and mixed stand. The highest reserves of forest floor were found in the spruce stand t ha which also corresponded to the exchangeable soil reaction the C N ratio being . The lowest reserves were found in the beech stand t ha the soil reaction was and the C N ratio was . The mixed stand represented an intermediate value between extreme positions. Keywords tree species composition soil forest floor reserves humus forms pH C N ratio The condition and form of humus in forest management are among key factors affecting the condition and growth of forest stands. In the course of the last century this fact was mentioned by prominent specialists in the field of forest pedology . by Nemec 1928 Maran and KÁS 1948 Pelisek 1964 SÁLY 1977 1978 . The function of forest floor within the soil profile where the decomposition of plant and animal material and the subsequent release of nutrients into the soil environment .