TAILIEUCHUNG - Báo cáo lâm nghiệp: "Soil-forming effect of Grand fir (Abies grandis [Dougl. ex D. Don] Lindl.)"

Tham khảo luận văn - đề án 'báo cáo lâm nghiệp: "soil-forming effect of grand fir (abies grandis [dougl. ex d. don] lindl.)"', luận văn - báo cáo phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | JOURNAL OF FOREST SCIENCE 55 2009 12 533-539 Soil-forming effect of Grand fir Abies grandis Dougl. ex D. Don Lindl. V. Podrazsky J. Remes Faculty of Forestry and Wood Sciences Czech University of Life Sciences in Prague Prague Czech Republic ABSTRACT The aim of the study is to evaluate the role of the Grand fir Abiesgrandis Dougl. ex D. Don Lindl. as a soil-improving species in the area of the University Training Forest in Kostelec nad Cernými lesy Jevany district. The state of humus forms in the stand part with Grand fir was compared with the mature Norway spruce Picea abies L. Karst. without regeneration with young beech Fagus sylvatica L. Norway spruce Picea abies L. Karst. and oak Quercus spp. L. stands all of pole stage . The site is characterized as 4P1 - acid oak-fir site with Luzula pilosa the geological bedrock is formed of cretaceous sandstone with loess overlays the soils are Luvisols the terrain is flat at the altitude of 420-440 m . The humus form samples L F H Ah horizons were taken in 4 replications quantitatively for the holorganic layers. The dry mass amount and total nutrient contents were analyzed for holorganic horizons the basic pedochemical characteristics pH soil adsorption complex characteristics exchangeable acidity and exchangeable nutrients were determined for all horizons. The results confirmed marked and positive effects of the Grand fir litter on the surface layer characteristics. This tree species supports the litter of good composition transforming easily and forming humus forms of higher quality compared to coniferous as well as studied broadleaved species. Keywords forest ecosystems Grand fir introduction humus forms humus accumulation soil chemistry biological amelioration The introduction of Grand fir Abies grandis Dougl. ex D. Don Lindl. was more in the focus of forestry research in the Czech Republic in the past Hofman 1963 SiKA 1983 . This species is among those with the highest production potential in the conditions of .

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