tailieunhanh - Báo cáo lâm nghiệp: "Some methodological aspects of the National Forest Inventory and Monitoring in Slovakia"

Tuyển tập những bài báo cáo nghiên cứu khoa học hay nhất được đăng trên tạp chí JOURNAL OF FOREST SCIENCE đề tài: Some methodological aspects of the National Forest Inventory and Monitoring in Slovakia. | JOURNAL OF FOREST SCIENCE 54 2008 10 476-483 Some methodological aspects of the National Forest Inventory and Monitoring in Slovakia s. Smelko1 J. Merganic2 1National Forest Centre - Forest Research Institute Zvolen Zvolen Slovakia 2FORIM - Forest Research Inventory and Monitoring Sobrance Slovakia ABSTRACT The work presents the conceptual information about the National Forest Inventory and Monitoring in Slovakia. It introduces some methodological approaches to the field data collection determination of tree heights by two-phase method regression formulas for tree volumes and assortments of forest tree species quantification of deadwood volume in sample plots and biometrical models prepared for data processing and generalisation of the results. The design and conception of Slovak National Forest Inventory and Monitoring were set with the aim to enable providing complex and integrated information about the state and changes of production and ecological characteristics of the forest ecosystems. Keywords tree heights tree volume deadwood volume biometrical models Slovak forestry Basic conception of the National Forest Inventory and Monitoring in Slovakia In Europe Slovakia belongs to the countries with a relatively high proportion of forestland 40 rich in tree species composition with variable natural conditions and with intensive forest management. It has a long tradition in detecting the forest conditions. At present three different systems exist for assessing the forest state - survey of natural conditions and forest ecology detection of forest stands condition for forest management needs and the national monitoring of forest health conditions executed yearly in a grid of 16 X 16 km. Lately the fourth system was established namely National Forest Inventory and Monitoring NFIM in Slovakia which was first executed in 2005 and 2006. Its aim is to detect the conditions of all components of forest ecosystems periodically and to observe the changes on national and .