Analyzing the Stability of Height Positions in Young Naturally Regenerated Stands of Scots Pine : Modelling Regeneration Success and Early Growth of Forest Stands. Proceedings from the IUFRO Conference held in Copenhagen, 10-13 June 1996. Proceedings from the IUFRO Conference held in Copenhagen, 10-13 June 1996

Horsholm

1996

S. 246-254

24 Lit. Ang.

Bandaufführung

78867

The stability of height position of splings in young stands of Scots pine (Pinus sylvestris L.) was examined by comparing the height order of trees at successive measurements. The data consited of six naturally regenerated stands and one planted stand for comparison. The length of the examination period was 21 years on average, covering the mean height development of stands from 0.5 m to 5.5 m. For each stand, a structural equation model was fitted by which the covariance structure occurring in the data can be described. In terms of stability coefficients, the height position of the saplings was very stable. The height positions had mainly been established during the first five years and at mean height less than 0.5 m. In the naturally regenerated stands, the stability was virtually complete from the stage of 20 years and 2-3 m onwards. In the planted stand, stability became complete slightly later than in the naturally regenerated stands. According to the results, height of the sapling can be stressed as a selection criteria in precommercial thinning.