TAILIEUCHUNG - Báo cáo lâm nghiệp: " On the niche breadth of Fagus sylvatica: soil nutrient status in 50 Central European beech stands on a broad range of bedrock types"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp Original article đề tài:" On the niche breadth of Fagus sylvatica: soil nutrient status in 50 Central European beech stands on a broad range of bedrock types" | Ann. For. Sci. 63 2006 355-368 355 INRA EDP Sciences 2006 DOI forest 2006016 Original article On the niche breadth of Fagus sylvatica soil nutrient status in 50 Central European beech stands on a broad range of bedrock types Christoph LEUSCHNER Ina C. MEIER Dietrich HERTEL Plant Ecology Albrecht-von-Haller-Institute of Plant Sciences University of Gottingen Untere Karspule 2 370737 Gottingen Germany Received 1 June 2005 accepted 4 January 2006 Abstract - The soil nutrient status of 50 Central European stands of Fagus sylvatica on 13 acidic to basic bedrock types was investigated with the aim 1 to define the extremes of important soil chemical and nutrient status parameters tolerated by beech forests ii to investigate the dependency of these parameters on bedrock type and soil acidity and iii to analyse the importance of the organic layer for the nutrient status of beech forests. Based on the parameters exchangeable cation pool Ca Mg Kex N P ratio of the organic layer and C N ratio of the mineral soil three nutrient supply classes were identified 1 limestone and claystone soils C N 15-18 mol mol-1 N P 20-26 mol mol-1 Ca Mg K ex 5-38 mol m-2 per 10 cm soil 2 silicate-rich sandstone tertiary sand loamy loess and moraine soils C N 20-26 mol mol-1 N P 24-45 mol mol-1 Ca Mg K ex 2-3 mol m-2 10 cm-1 and 3 soils derived from silicate-poor sandy deposits C N 28-34 mol mol-1 N P 47-59 mol mol-1 Ca Mg K ex 1-3 mol m-2 10 cm-1 . Soil chemical extremes tolerated by beech were 3-99 base saturation of pH H2O and minima of resin-exchangeable P of 11 mol m-2 and of Ca Mg K ex of mol m-2 in the topsoil 0-10 cm . A highly variable amount of exchangeable Al in the mineral soil was identified as the key factor controlling the accumulation of C in the organic layer OL OF OH . Increasing organic layer N P ratios 19 to 59 mol mol-1 from basic to acidic soils point at a growing importance of P limitation over N limitation with increasing acidity in beech forest soils. .

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