Impact of microbial activity on the leaching of soluble N forms in soil

Alison Carswell; P. W. Hill; D. L.  Jones; M. S. A. Blackwell; Penny Johnes; E. Dixon; D.  Chadwick

doi:10.1007/s00374-017-1250-9

Impact of microbial activity on the leaching of soluble N forms in soil

Alison Carswell, P. W. Hill, D. L. Jones, M. S. A. Blackwell, Penny Johnes, E. Dixon, D. Chadwick

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Abstract

The hydrological transport of low-molecular weight organic nitrogen (LMWON) compounds has received little attention in the literature, particularly relative to inorganic nitrogen (N), with less attention given to the decoupling of the carbon (C) and N cycles following rainfall events. We determined the impacts of the soil biota on the transport of N compounds in a loam soil, using ¹⁵N and ¹³C to trace the vertical transport of ¹⁵N¹³C-urea, ¹⁵N¹³C-amino acids, ¹⁵NO₃, and ¹⁵NH₄ through the soil profile, following simulated rainfall events. This research has demonstrated that biotic assimilation leads to rapid decoupling of the C and N cycles during leaching, with C transport limited to the soil surface (< 2 cm), whereas N which was stored within the soil profile during a single rainfall event could be remobilised and leached (a further 2–6 cm) following an additional rainfall event.

Original language	English
Pages (from-to)	21-25
Number of pages	5
Journal	Biological Fertility of Soils
Volume	54
Issue number	1
Early online date	19 Oct 2017
DOIs	https://doi.org/10.1007/s00374-017-1250-9
Publication status	Published - 1 Jan 2018

Keywords

Amino acids
DON
Immobilisation
Leaching
Mobilisation
Urea

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10.1007/s00374-017-1250-9

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This is the final published version of the article (version of record). It first appeared online via Springer at https://link.springer.com/article/10.1007%2Fs00374-017-1250-9 . Please refer to any applicable terms of use of the publisher.
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This is the final published version of the article (version of record). It first appeared online via Springer at https://link.springer.com/article/10.1007%2Fs00374-017-1250-9 . Please refer to any applicable terms of use of the publisher.
Final published version, 20.8 KBLicence: CC BY

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title = "Impact of microbial activity on the leaching of soluble N forms in soil",

abstract = "The hydrological transport of low-molecular weight organic nitrogen (LMWON) compounds has received little attention in the literature, particularly relative to inorganic nitrogen (N), with less attention given to the decoupling of the carbon (C) and N cycles following rainfall events. We determined the impacts of the soil biota on the transport of N compounds in a loam soil, using 15N and 13C to trace the vertical transport of 15N13C-urea, 15N13C-amino acids, 15NO3, and 15NH4 through the soil profile, following simulated rainfall events. This research has demonstrated that biotic assimilation leads to rapid decoupling of the C and N cycles during leaching, with C transport limited to the soil surface (< 2 cm), whereas N which was stored within the soil profile during a single rainfall event could be remobilised and leached (a further 2–6 cm) following an additional rainfall event.",

keywords = "Amino acids, DON, Immobilisation, Leaching, Mobilisation, Urea",

author = "Alison Carswell and Hill, {P. W.} and Jones, {D. L.} and Blackwell, {M. S. A.} and Penny Johnes and E. Dixon and D. Chadwick",

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T1 - Impact of microbial activity on the leaching of soluble N forms in soil

AU - Carswell, Alison

AU - Hill, P. W.

AU - Jones, D. L.

AU - Blackwell, M. S. A.

AU - Johnes, Penny

AU - Dixon, E.

AU - Chadwick, D.

PY - 2018/1/1

Y1 - 2018/1/1

N2 - The hydrological transport of low-molecular weight organic nitrogen (LMWON) compounds has received little attention in the literature, particularly relative to inorganic nitrogen (N), with less attention given to the decoupling of the carbon (C) and N cycles following rainfall events. We determined the impacts of the soil biota on the transport of N compounds in a loam soil, using 15N and 13C to trace the vertical transport of 15N13C-urea, 15N13C-amino acids, 15NO3, and 15NH4 through the soil profile, following simulated rainfall events. This research has demonstrated that biotic assimilation leads to rapid decoupling of the C and N cycles during leaching, with C transport limited to the soil surface (< 2 cm), whereas N which was stored within the soil profile during a single rainfall event could be remobilised and leached (a further 2–6 cm) following an additional rainfall event.

AB - The hydrological transport of low-molecular weight organic nitrogen (LMWON) compounds has received little attention in the literature, particularly relative to inorganic nitrogen (N), with less attention given to the decoupling of the carbon (C) and N cycles following rainfall events. We determined the impacts of the soil biota on the transport of N compounds in a loam soil, using 15N and 13C to trace the vertical transport of 15N13C-urea, 15N13C-amino acids, 15NO3, and 15NH4 through the soil profile, following simulated rainfall events. This research has demonstrated that biotic assimilation leads to rapid decoupling of the C and N cycles during leaching, with C transport limited to the soil surface (< 2 cm), whereas N which was stored within the soil profile during a single rainfall event could be remobilised and leached (a further 2–6 cm) following an additional rainfall event.

KW - Amino acids

KW - DON

KW - Immobilisation

KW - Leaching

KW - Mobilisation

KW - Urea

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U2 - 10.1007/s00374-017-1250-9

DO - 10.1007/s00374-017-1250-9

M3 - Article (Academic Journal)

AN - SCOPUS:85031826939

VL - 54

SP - 21

EP - 25

JO - Biological Fertility of Soils

JF - Biological Fertility of Soils

SN - 0178-2762

IS - 1

ER -

Impact of microbial activity on the leaching of soluble N forms in soil

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DOMAINE: Characterisation of the nature, origins and ecological significance of dissolved organic matter in freshwater ecosystems

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Impact of microbial activity on the leaching of soluble N forms in soil

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DOMAINE: Characterisation of the nature, origins and ecological significance of dissolved organic matter in freshwater ecosystems

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