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  • 1
    Electronic Resource
    Electronic Resource
    Interception and uptake of NH4 and NO3 from wet deposition by above-ground parts of young beech (Fagus silvatica L.) trees (1992)
    Springer
    Plant and soil 142 (1992), S. 273-279 
    Details
    ISSN: 1573-5036
    Keywords: Fagus silvatica L. ; wet deposition ; N-uptake ; 15N
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Uptake of NH4 and NO3 by above ground parts of beech trees was studied by spraying young trees with varying concentrations of 15N labeled solutions, different N-forms, and spray regimes over four months. Following treatment, the trees were harvested and analyzed for 15N and major element content. Throughfall was collected and analyzed in addition in order to study the interaction between nitrogen uptake and cation leaching. Significant amounts of N were taken up by the above ground plant parts in all treatments as indicated by 15N analysis of the trees as well as by throughfall measurements. NH4 uptake exceeded the uptake of NO3 if applied in the same concentration. Uptake of N increased linearly with increasing concentration in the spray solution and with spray intensity. The uptaken N was translocated within the plant. The contribution of N from uptake by above ground parts to the total N content of tissues differed and reached a maximum level of 6% in leaves. No effect of above ground N uptake on the total N content of tissues was found. Calculating atmospheric N inputs to forest ecosystems by throughfall measurements may underestimate the actual N input.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00010972
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Heterogeneity of soil and soil solution chemistry under Norway spruce (Picea abies Karst.) and European beech (Fagus silvatica L.) as influenced by distance from the stem basis (1993)
    Springer
    Plant and soil 151 (1993), S. 227-237 
    Details
    ISSN: 1573-5036
    Keywords: element fluxes ; Fagus silvatica L. ; Picea abies Karst. ; soil acidity ; soil solution ; spatial heterogeneity ; stemflow
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The influence of the distance to the stem on the chemical properties of soil and soil solution were investigated in a mature European beech (Fagus silvatica L.) and a Norway spruce (Picea abies Karst.) stand by comparing areas close to stems with reference areas between stems. Under beech, significant changes of soil chemistry close to the stem were observed. Distance from the stem influenced the exchangeable K, Mg, Ca and Al, as well as soil pH. Ca/Al- and Mg/Al-ratios of the soil solution showed higher values at the base of the stem. A significant increase of K and NO3-N concentrations of the soil solution close to the stem was found. No significant differences of soil analyses from reference sites and the base of the stem were detectable in case of spruce. Only the soil solution chemistry of the spruce site showed distinct spatial patterns. A significant increase of Ca, K and NH4 concentrations was determined next to the stem, while the concentrations of NO3 were considerably decreased. These findings suggest that the spatial heterogeneity of soil and soil solution chemistry related to stem distance should be taken into account when establishing element budgets and when evaluating the nutrient resources and the risk of acid toxicity to tree roots. ei]Section editor: R F Huettl
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00016288
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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