Natural Regeneration of Spruce (Picea abies) on Clear Cuttings Preliminary Results from a Field Study in South-East Norway : Modelling Regeneration Success and Early Growth of Forest Stands. Proceedings from the IUFRO Conference held in Copenhagen, 10-13 June 1996

Horsholm

1996

S. 351-362

10 Lit. Ang.

Bandaufführung

78888

The natural regeneration of spruce was studied on 24 clear cut areas in south-east Norway, on three different vegetation types. There were significant differences in regeneration between the vegetation types. For spruce, the best results were found on the vegetation type Eu-Piceetum dryopertidetsum (small ferns - spruce forest). Eu-Piceetum myrtilletosum (blueberry - spruce forest) showd an intermediate level of success, while Melico-Piceetum typicum (low-herb - spruce forest) came out last. For deciduous species, the decreasing order was small ferns - low-herb - blueberry vegetation type. The average number of spruce decreased with distance to the seed tree edge. The decrease was rapid from the seed tree edge out to about 25 m (or approximately one tree height). The number of spruce saplings were found to increase with increasing cover percentage of Sphagnum-mosses and other mosses, while increasing percentage of large ferns and herbs and slash from the final felling would decrease the number of spruce. All together, these factors - vegetation type, distance from seed trees and present cover percentages of different vegetation groups - could not explain more than approximately 15% of the variation in the number of spruce saplings, indicating that other factors may be more important in determining the success of natural regeneration.