NORWAY SPRUCE TIMBER QUALITY AT DIFFERENT SILVICULTURAL MEASURES AND FOREST SITE TYPES

The paper deals with a comparison of production quality of individual assortments of Norway spruce growing on different types of forest sites of the training forest enterprise of the Czech University of Life Sciences Prague in Kostelec nad ?ern?mi lesy, Czech Republic. Two even-aged plots with different stand tending were compared: plot 1 – forest site type 4K (acidicbeechwood), plot 2 – forest site type 4P (acidic oak-firwood). The basic mensurational characteristics such as mean diameter, mean height, stand density, site index, mean tree volume, and stock volume were determined. The individual trees were divided into quality classes A, B, and C. From the statistical evaluation it is clear that the production potential is very similar on both plots. Lower stand density and higher light intensity affects differentiation of the diameter increment on both plots. The site type of plot 2 had a better effect on supply of ground water. The production of the individuals with high qualitative characteristics can be summarized into a few basic points for t he maximum assortment yield.