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The influence of N load and harvest intensity on the risk of P limitation in Swedish forest soils
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- Akselsson, Cecilia (författare)
- Lund University,Lunds universitet,Avdelningen för kemiteknik,Institutionen för processteknik och tillämpad biovetenskap,Institutioner vid LTH,Lunds Tekniska Högskola,Institutionen för naturgeografi och ekosystemvetenskap,Naturvetenskapliga fakulteten,Division of Chemical Engineering,Department of Process and Life Science Engineering,Departments at LTH,Faculty of Engineering, LTH,Dept of Physical Geography and Ecosystem Science,Faculty of Science,IVL Swedish Environmental Research Institute, Sweden
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- Olle, Westling (författare)
- IVL Swedish Environmental Research Institute, Sweden
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- Alveteg, Mattias (författare)
- Lund University,Lunds universitet,Avdelningen för kemiteknik,Institutionen för processteknik och tillämpad biovetenskap,Institutioner vid LTH,Lunds Tekniska Högskola,Division of Chemical Engineering,Department of Process and Life Science Engineering,Departments at LTH,Faculty of Engineering, LTH,Lund University, Sweden
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- Elsevier BV, 2008
- 2008
- Engelska.
- Ingår i: Science of the Total Environment. - : Elsevier BV. - 1879-1026 .- 0048-9697. ; 404, s. 284-289
- Tidskriftsartikel (refereegranskat)
Abstract
Ämnesord
Stäng
- Nitrogen (N) is often considered to be the major factor limiting tree growth in northern forest ecosystems. An increased N availability, however, increases the demand for other nutrients such as base cations and phosphorous (P) which in turn may change which nutrient is the limiting factor. If P or base cations become limiting, N will start to leach which means a risk of increased eutrophication of surface waters. As many studies focus on base cations, this study instead aims at estimating P budgets on a regional scale for different harvesting scenarios relevant for Swedish conditions. P budget calculations were carried out for 14,550 coniferous sites from the Swedish National Forest Inventory, as weathering+deposition–harvesting–leaching. Three scenarios with different harvest intensities were used: 1) no harvesting, 2) stem harvesting and 3) wholetree harvesting. The input data were derived from measurements and model results. The P budget estimates indicate that harvesting, especially whole-tree harvesting, result in net losses of P in large parts of Sweden. The highest losses were found in southern Sweden due to high growth rate in this area. In the whole-tree harvesting scenario the losses exceeded 1 kg ha−1 y−1 on many sites. N budget calculations on the same sites indicate that N generally accumulates in the whole country and especially in the southern parts. Consequently, the N and P budget calculations indicate that the forests in southern Sweden are in a transition phase from N-to P-limitation to growth. This transition will proceed as long as the accumulation of N continues. These results are important in a sustainable forestry context, as a basis for assessing the risk of future N leaching, and in designing recommendations for abatement strategies of N deposition and for application of wood ash recycling and N fertilization.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Environmental Sciences (hsv//eng)
- LANTBRUKSVETENSKAPER -- Lantbruksvetenskap, skogsbruk och fiske -- Skogsvetenskap (hsv//swe)
- AGRICULTURAL SCIENCES -- Agriculture, Forestry and Fisheries -- Forest Science (hsv//eng)
Nyckelord
- Phosphorous
- Nitrogen
- Budget
- Forest soils
- Sweden
- Harvesting
- Weathering
- Forestry and Wood Technology
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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