Soil nitrogen form and plant nitrogen uptake along a boreal forest productivity gradient. Nordin, A., Högberg, P., & Näsholm, T. Oecologia, 129(1):125–132, September, 2001. ![Soil nitrogen form and plant nitrogen uptake along a boreal forest productivity gradient [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper doi abstract bibtex We present results from a study of soil solution concentrations of ammonium (NH4+), nitrate (NO3–), and amino acid N over one growing season along a local 90-m-long plant productivity gradient in a boreal forest. Three forest types are found along the gradient: an ericaceous dwarf-shrub type between 0 and 40 m, a low-herb type between 40 and 80 m, and a tall-herb type at 90 m. Soil sampling of the mor layer was performed in June, July, August and October in the three forest types. In addition, plant uptake of NH4+, NO3– and the amino acid glycine was investigated. A mixture of the three N forms was injected into the soil; one N form at a time was labeled with 15N, and in the case of glycine also with 13C. In the dwarf-shrub forest, where plant productivity was low, the soil N pool was strongly dominated by amino acid N. There, plants took up more NH4+ than NO3–. Glycine uptake did not differ significantly from either NH4+ or NO3– uptake. Along the gradient, soil concentrations of NH4+ and NO3– increased, as did plant productivity. In the low-herb forest NH4+ comprised a major portion of the soil N pool, and plants took up more NH4+ than NO3– or glycine. In the tall-herb forest, NO3– was as abundant as NH4+, and together these two N forms dominated the soil N pool. Here, plants took up nearly equal amounts of NO3– and NH4+, and this uptake exceeded that of glycine severalfold. Apart from the overall preference for NH4+ that plants exhibited throughout the gradient, the results show a correlation between soil concentrations of amino acids and NO3– and plant preferences for these N forms.
@article{nordin_soil_2001,
title = {Soil nitrogen form and plant nitrogen uptake along a boreal forest productivity gradient},
volume = {129},
issn = {1432-1939},
url = {https://doi.org/10.1007/s004420100698},
doi = {10.1007/s004420100698},
abstract = {We present results from a study of soil solution concentrations of ammonium (NH4+), nitrate (NO3–), and amino acid N over one growing season along a local 90-m-long plant productivity gradient in a boreal forest. Three forest types are found along the gradient: an ericaceous dwarf-shrub type between 0 and 40 m, a low-herb type between 40 and 80 m, and a tall-herb type at 90 m. Soil sampling of the mor layer was performed in June, July, August and October in the three forest types. In addition, plant uptake of NH4+, NO3– and the amino acid glycine was investigated. A mixture of the three N forms was injected into the soil; one N form at a time was labeled with 15N, and in the case of glycine also with 13C. In the dwarf-shrub forest, where plant productivity was low, the soil N pool was strongly dominated by amino acid N. There, plants took up more NH4+ than NO3–. Glycine uptake did not differ significantly from either NH4+ or NO3– uptake. Along the gradient, soil concentrations of NH4+ and NO3– increased, as did plant productivity. In the low-herb forest NH4+ comprised a major portion of the soil N pool, and plants took up more NH4+ than NO3– or glycine. In the tall-herb forest, NO3– was as abundant as NH4+, and together these two N forms dominated the soil N pool. Here, plants took up nearly equal amounts of NO3– and NH4+, and this uptake exceeded that of glycine severalfold. Apart from the overall preference for NH4+ that plants exhibited throughout the gradient, the results show a correlation between soil concentrations of amino acids and NO3– and plant preferences for these N forms.},
language = {en},
number = {1},
urldate = {2021-11-02},
journal = {Oecologia},
author = {Nordin, Annika and Högberg, Peter and Näsholm, Torgny},
month = sep,
year = {2001},
pages = {125--132},
}
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In addition, plant uptake of NH4+, NO3– and the amino acid glycine was investigated. A mixture of the three N forms was injected into the soil; one N form at a time was labeled with 15N, and in the case of glycine also with 13C. In the dwarf-shrub forest, where plant productivity was low, the soil N pool was strongly dominated by amino acid N. There, plants took up more NH4+ than NO3–. Glycine uptake did not differ significantly from either NH4+ or NO3– uptake. Along the gradient, soil concentrations of NH4+ and NO3– increased, as did plant productivity. In the low-herb forest NH4+ comprised a major portion of the soil N pool, and plants took up more NH4+ than NO3– or glycine. In the tall-herb forest, NO3– was as abundant as NH4+, and together these two N forms dominated the soil N pool. Here, plants took up nearly equal amounts of NO3– and NH4+, and this uptake exceeded that of glycine severalfold. 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In the tall-herb forest, NO3– was as abundant as NH4+, and together these two N forms dominated the soil N pool. Here, plants took up nearly equal amounts of NO3– and NH4+, and this uptake exceeded that of glycine severalfold. Apart from the overall preference for NH4+ that plants exhibited throughout the gradient, the results show a correlation between soil concentrations of amino acids and NO3– and plant preferences for these N forms.},\n\tlanguage = {en},\n\tnumber = {1},\n\turldate = {2021-11-02},\n\tjournal = {Oecologia},\n\tauthor = {Nordin, Annika and Högberg, Peter and Näsholm, Torgny},\n\tmonth = sep,\n\tyear = {2001},\n\tpages = {125--132},\n}\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n","author_short":["Nordin, A.","Högberg, P.","Näsholm, T."],"key":"nordin_soil_2001","id":"nordin_soil_2001","bibbaseid":"nordin-hgberg-nsholm-soilnitrogenformandplantnitrogenuptakealongaborealforestproductivitygradient-2001","role":"author","urls":{"Paper":"https://doi.org/10.1007/s004420100698"},"metadata":{"authorlinks":{}}},"bibtype":"article","biburl":"https://bibbase.org/zotero/upscpub","dataSources":["Tu3jPdZyJF3j547xT","9cGcv2t8pRzC92kzs","3zTPPmKj8BiTcpc6C"],"keywords":[],"search_terms":["soil","nitrogen","form","plant","nitrogen","uptake","along","boreal","forest","productivity","gradient","nordin","högberg","näsholm"],"title":"Soil nitrogen form and plant nitrogen uptake along a boreal forest productivity gradient","year":2001}