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Article
Decomposition of 15N-labelled beech litter and fate of nitrogen derived from litter in a beech forest
The decomposition and the fate of 15N- labelled beech litter was monitored in a beech forest (Vosges mountains, France) over 3 years. Circular plots around beech trees were isolated from neighbouring tree roots b...
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Chapter
The Fate of 15N-Labelled Nitrogen Inputs to Coniferous and Broadleaf Forests
Nitrogen in forest soils is mainly composed of organic N compounds originating from litterfall. During leaf senescence of the forest vegetation, N compounds are either allocated to perennial tissues or remain ...
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Chapter
Soil Organic Matter in Mediterranean-Type Ecosystems and Global Climatic Changes: A Case Study—The Soils of the Mediterranean Basin
On a worldwide basis, the soil organic carbon pool is around two to three times the amount of carbon stored in the atmosphere and two to three times that stored in the terrestrial biomass (Bohn, 1982; Rozanov,...
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Article
Effect of elevated CO2 on carbon and nitrogen distribution within a tree (Castanea sativa Mill.) — soil system
Two-year-old sweet chestnut trees were grown outside in normal or double CO2 atmospheric concentration. In spring and in autumn of two growing seasons, a six day labelling pulse of14C labelled CO2 was used to fol...
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Article
Modifications of the carbon and nitrogen allocations in the plant (Triticum aestivum L.) soil system in response to increased atmospheric CO2 concentration
The aim of this work was to examine the response of wheat plants to a doubling of the atmospheric CO2 concentration on: (1) carbon and nitrogen partitioning in the plant; (2) carbon release by the roots; and (3) ...
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Article
Litter mass loss rates in pine forests of Europe and Eastern United States: some relationships with climate and litter quality
The purpose of this study was to relate regional variation in litter mass-loss rates (first year) in pine forests to climate across a large, continental-scale area. The variation in mass-loss rate was analyzed...
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Chapter
Atmospheric Co2Increase and Plant Material Quality: Production, Nitrogen Allocation and Litter Decomposition of Sweet Chestnut
Two-year-old sweet chestnut trees were grown for two other years in a doubled CO2 atmosphere. The result was an increase by 20% of the net production and, as an effect of dilution, a decrease of the nitrogen conc...
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Chapter
The Effect of Increased Atmospheric Co2 Concentration on the Gowth and Nitrogen Allocation of A Woody Plant (Castanea Sativa Mill.)
The direct and indirect effects of atmospheric CO2 increase on the plant growth and the functioning of the soils as net source or sink of CO2 arise two fundamental questions: Is the carbon, and especially the nit...
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Article
Native carbon mineralization of an acid organic soil after use of the chloroform-fumigation method to estimate microbial biomass
Two experiments were carried out on a dysmoder humus sampled from a depth of 2–5 cm from a mixed hardwood forest. In acid soil, the chloroform fumigation-incubation method failed to estimate the microbial biom...
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Article
Effect of wheat (Triticum aestivum) roots on mineralization rates of soil organic matter
Two different soils were amended with 14C-labelled plant material and incubated under controlled laboratory conditions for 2 years. Half the samples were cropped with wheat (Triticum aestivum) 10 times in success...
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Article
Root activity and carbon metabolism in soils
Two different soils were amended with 14C-labelled plant material and incubated under controlled laboratory conditions for 2 years. Half the samples were cropped with wheat (Triticum aestivum) 10 times in success...
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Article
Method for simultaneous measurement of total and radioactive carbon in soils, soil extracts and plant materials
A rapid procedure is proposed for simultaneous measurement of total and radioactive carbon in soils, soil extracts and plant materials. The procedure involves dry or wet combustion of the sample, total carbon ...
