The influence of the plantation scheme to structural parameters in young spruce stands

摘要

The paper presents the results of the research carried out into an experimen-tal plot installed using different plantation scheme for spruce, following theinfluence of the initial density of plantation to indicators of the structural struc-ture. That was built, in 1977, with four repetitions and each with four work vari-ants: 2500 plants to hectare, 3300 plants to hectare, 5000 plants to hectare and7510 plants to hectare. The main studied topics, at 25 year stand old, were: the evolution of the bio-metric parameters (DBH, height corresponding to the DBH, number of the treesto hectare, stand volume perto hectare, density indicators), dynamic of the sta-bility parameters (slender stem coefficient, percent of the crown height) anddynamic of the qualitative parameters (damages frequency produced by deer,average damage age, percent of the stem decay). Finally, it was possible an eval-uation of the structural parameters dynamic correlated with number of plantsused at stand installation. This research brought up some unknown aspects that can be considered asnew contributions concerning the influence of the plantation scheme to structur-al parameters in young spruce stands for a sustainable forest management inmountainous ecosystems affected by disturbance factors