Resistance of Young Spruce Stands to Snow and Wind Damage in Dependence on Thinning

1987

S. 75-86

3 Abb., 2 Tab., 15 Lit. Ang.

Unselbständiges Werk

200037506

Resistance of young spruce stands to snow and wind damage was investigated on the research plot Zajeciny in Orlicke hory Mountains, founded in 1969 in 19 years old spruce thicket. The height and diameter increment and development of h/d ratio of dominant, codominant and suppressed trees in thinned and unthinned experimental stands was studied in this article along with former development of trees broken by snow or uprooted by wind in the age of 30 years. By evaluation of the experiment lasting 15 years the influence of thinning on resistance of the stand to snow and wind damage was proved. The intentionally unthinned stand of high density was damaged by snow, still it was more resistant to wind. On the other hand, the intensively thinned stand resistant to snow suffered from wind. For the purpose of increasing the resistance to both snow and wind, the pass from intensive thinning in the young age to a full canopy in older stands is recommended.