[Growth specifics of spruce mountain populations in extreme conditions]
2001
Jurasek, A. | Martincova, J. (Vyskumni Ustav Lesniho Hospodarstvi a Myslivosti, Opocno (Czech Republic). Vyzkumna Stanice Opocno)
Quality of planting stock plays an important part in reforestation of extreme mountain localities. Quite different demands of spruce seedlings originating from high altitude seed sources have to be taken into account during cultivation in nurseries. The influence of various ways of cultivation and performance after outplanting in the Krkonose Mts. in 1000 to 1100 m above sea level were assessed during years 1990 to 1999. We dealt particularly with growing plants in nurseries in different altitudes, transplanting without culling small seedlings and use of bare root and containerised plants. Results show, that long-term growing of spruce plants in so called "acclimation" nursery in high altitude is not the suitable technology for the Krkonose Mts. Adverse effects occurred still six years after outplanting. Optimal way is the cultivation in nurseries located in 600-700 above sea level, near the reforested localities. Slowly growing seedlings of mountain spruce (usually culled in nurseries) perform very well after outplanting and gradually reduce the initial height differences. Culling these slowly growing seedlings means the risk of loss the most valuably part of genetic spectrum. Good performance after careful outplanting occurs in both bare rooted and containerised plants
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