Jugendwachstum und Differenzierung von Fichten-Naturverjüngungen - Konsequenzen für die waldbauliche Behandlung

2003

4 Abb., 31 Lit. Ang.

Artikel aus einer Zeitschrift

200106319

Changes in silvicultural strategies have led to a shift from aritficial to natural regeneration of Norway spruce in Lower Saxony. Due to a lack of experience with naturally regenerated juvenile spruce stands the need for tending operations at early stages of stand development has been controversially discussed in recent years. In most cases natural regeneration results in high stands densities leading to strong intraspecific competition and high mortality rates during the thicket stage. Strong competition in uniform stands can result in wide height/diameter ratios and small tree corwns associated with instability against snow breakage and windthrow. Furthermore diameter increment is inhibited and productivity decreases. This implies the need for tending operations at an early stand age (dominant height 1,5-3 m). In some cases however, especially below non-uniform canopies or in case of small scale site variability, a class of dominant trees of satisfactory stability develops by itself. A silvicultural concept considering the efficient use of limited financial resources as well as the exceptional importance of risk reduction in Norway spruce stands is presented.