TAILIEUCHUNG - Báo cáo lâm nghiệp: "Comparison of the impact of blue spruce and reed Calamagrostis villosa on forest soil chemical properties"

Tuyển tập những bài báo cáo nghiên cứu khoa học hay nhất được đăng trên tạp chí JOURNAL OF FOREST SCIENCE đề tài: Comparison of the impact of blue spruce and reed Calamagrostis villosa on forest soil chemical properties. | JOURNAL OF FOREST SCIENCE 55 2009 5 208-214 Comparison of the impact of blue spruce and reed Calamagrostis villosa on forest soil chemical properties O. Spulák D. Dusek Forestry and Game Management Research Institute Strnady Opocno Research Station Opocno Czech Republic ABSTRACT The impact of blue spruce Piceapungens and reed Calamagrostis villosa cover on quantity and quality of upper soil layers was investigated. The research was conducted in the Jizerské hory Mts. Czech Republic altitude 880 m acidic spruce forest site type - 8K . Mean weight of dry matter of holorganic horizons was similar under both variants. Totally there were accumulated 153 t ha of dry matter of humus horizons in blue spruce and 174 t ha in reed. Soil pH KCl varied from to under blue spruce stand and from to under reed. The differences of concentrations of nutrients P K Ca Mg were not found significant either. Only L horizon showed significant differences there were higher values of cation exchangeable capacity T and higher content of exchangeable bases S under reed. We found very similar forest-floor humus properties under both species. Therefore we can not state worsening of the soil conditions under blue spruce compared to areas covered with tested forest weed species. Keywords Picea pungens forest weed Calamagrostis villosa upper soil layers quality and quantity Jizerské hory Mts. Nutrient content as well as other chemical and physical properties of soils are the consequence of bedrock abiotic soil forming factors and impact of organisms - plants and animals. The inner ecosystem nutrient exchange has following sub-processes production conversion mineralization recycling Otto 1994 . Plants use nutrients included in atmosphere and soil liquids to build phytobiomass. One part of the biomass is through litterfall directly transported to soil and transformed by bio-chemical processes. Direct impact of specific plant species on soil characteristics differs Singer Munns 2005 .

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