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Changes in organic phosphorus composition in boreal forest humus soils: the role of iron and aluminium

Vincent, Andrea G.; Schleucher, Jurgen; Grobner, Gerhard; Vestergren, Johan; Persson, Per LU ; Jansson, Mats and Giesler, Reiner (2012) In Biogeochemistry 108. p.485-499
Abstract
Organic phosphorus (P) is an important component of boreal forest humus soils, and its concentration has been found to be closely related to the concentration of iron (Fe) and aluminium (Al). We used solution and solid state P-31 NMR spectroscopy on humus soils to characterize organic P along two groundwater recharge and discharge gradients in Fennoscandian boreal forest, which are also P sorption gradients due to differences in aluminium (Al) and iron (Fe) concentration in the humus. The composition of organic P changed sharply along the gradients. Phosphate diesters and their degradation products, as well as polyphosphates, were proportionally more abundant in low Al and Fe sites, whereas phosphate monoesters such as myo-, scyllo- and... (More)
Organic phosphorus (P) is an important component of boreal forest humus soils, and its concentration has been found to be closely related to the concentration of iron (Fe) and aluminium (Al). We used solution and solid state P-31 NMR spectroscopy on humus soils to characterize organic P along two groundwater recharge and discharge gradients in Fennoscandian boreal forest, which are also P sorption gradients due to differences in aluminium (Al) and iron (Fe) concentration in the humus. The composition of organic P changed sharply along the gradients. Phosphate diesters and their degradation products, as well as polyphosphates, were proportionally more abundant in low Al and Fe sites, whereas phosphate monoesters such as myo-, scyllo- and unknown inositol phosphates dominated in high Al and Fe soils. The concentration of inositol phosphates, but not that of diesters, was positively related to Al and Fe concentration in the humus soil. Overall, in high Al and Fe sites the composition of organic P seemed to be closely associated with stabilization processes, whereas in low Al and Fe sites it more closely reflected inputs of organic P, given the dominance of diesters which are generally assumed to constitute the bulk of organic P inputs to the soil. These gradients encompass the broad variation in soil properties detected in the wider Fennoscandian boreal forest landscape, as such our findings provide insight into the factors controlling P biogeochemistry in the region but should be of relevance to boreal forests elsewhere. (Less)
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author
publishing date
type
Contribution to journal
publication status
published
subject
in
Biogeochemistry
volume
108
pages
485 - 499
publisher
Springer
external identifiers
  • scopus:84857632949
ISSN
1573-515X
DOI
10.1007/s10533-011-9612-0
language
English
LU publication?
no
id
b8ac0ae0-78ca-4633-9580-6363bb3051eb (old id 4332229)
date added to LUP
2014-03-04 09:45:01
date last changed
2017-10-22 03:32:12
@article{b8ac0ae0-78ca-4633-9580-6363bb3051eb,
  abstract     = {Organic phosphorus (P) is an important component of boreal forest humus soils, and its concentration has been found to be closely related to the concentration of iron (Fe) and aluminium (Al). We used solution and solid state P-31 NMR spectroscopy on humus soils to characterize organic P along two groundwater recharge and discharge gradients in Fennoscandian boreal forest, which are also P sorption gradients due to differences in aluminium (Al) and iron (Fe) concentration in the humus. The composition of organic P changed sharply along the gradients. Phosphate diesters and their degradation products, as well as polyphosphates, were proportionally more abundant in low Al and Fe sites, whereas phosphate monoesters such as myo-, scyllo- and unknown inositol phosphates dominated in high Al and Fe soils. The concentration of inositol phosphates, but not that of diesters, was positively related to Al and Fe concentration in the humus soil. Overall, in high Al and Fe sites the composition of organic P seemed to be closely associated with stabilization processes, whereas in low Al and Fe sites it more closely reflected inputs of organic P, given the dominance of diesters which are generally assumed to constitute the bulk of organic P inputs to the soil. These gradients encompass the broad variation in soil properties detected in the wider Fennoscandian boreal forest landscape, as such our findings provide insight into the factors controlling P biogeochemistry in the region but should be of relevance to boreal forests elsewhere.},
  author       = {Vincent, Andrea G. and Schleucher, Jurgen and Grobner, Gerhard and Vestergren, Johan and Persson, Per and Jansson, Mats and Giesler, Reiner},
  issn         = {1573-515X},
  language     = {eng},
  pages        = {485--499},
  publisher    = {Springer},
  series       = {Biogeochemistry},
  title        = {Changes in organic phosphorus composition in boreal forest humus soils: the role of iron and aluminium},
  url          = {http://dx.doi.org/10.1007/s10533-011-9612-0},
  volume       = {108},
  year         = {2012},
}