A novel 15N vertical split-root method for in situ estimation of N rhizodeposition

Research output: Contribution to journal › Journal article › Research › peer-review

Standard

A novel 15N vertical split-root method for in situ estimation of N rhizodeposition. / Rasmussen, Jim; Dresbøll, Dorte Bodin; Lønne Enggrob, Kirsten; Peixoto, Leanne.

In: Geoderma, Vol. 383, 114782, 2021.

Research output: Contribution to journal › Journal article › Research › peer-review

Harvard

Rasmussen, J, Dresbøll, DB, Lønne Enggrob, K & Peixoto, L 2021, 'A novel 15N vertical split-root method for in situ estimation of N rhizodeposition', Geoderma, vol. 383, 114782. https://doi.org/10.1016/j.geoderma.2020.114782

APA

Rasmussen, J., Dresbøll, D. B., Lønne Enggrob, K., & Peixoto, L. (2021). A novel 15N vertical split-root method for in situ estimation of N rhizodeposition. Geoderma, 383, [114782]. https://doi.org/10.1016/j.geoderma.2020.114782

Vancouver

Rasmussen J, Dresbøll DB, Lønne Enggrob K, Peixoto L. A novel 15N vertical split-root method for in situ estimation of N rhizodeposition. Geoderma. 2021;383. 114782. https://doi.org/10.1016/j.geoderma.2020.114782

Author

Rasmussen, Jim ; Dresbøll, Dorte Bodin ; Lønne Enggrob, Kirsten ; Peixoto, Leanne. / A novel 15N vertical split-root method for in situ estimation of N rhizodeposition. In: Geoderma. 2021 ; Vol. 383.

Bibtex

@article{1eedace8eb7442e8b2e3335a96bba15d,
title = "A novel 15N vertical split-root method for in situ estimation of N rhizodeposition",
abstract = "Estimates of nitrogen (N) losses from living plants (phyllo- and rhizodeposition) are needed to improve the sustainability of the present agricultural cropping systems. These estimates are hard to achieve under field conditions among others due to a lack of suitable methods to study these N flows. A novel vertical split-root with 15N placement in deeper soils layers is suggested here as a means to improve the present tracer based methods for phyllo- and rhizodeposition estimation. We found enrichment of soil above the point of tracer injection (at 290 cm) with rhizosphere having higher enrichment than bulk soil underlining that 15N was derived from roots. The relative net N rhizodeposition was highest for lucerne and decreased with depth for all three plant species investigated (lucerne, kernza{\textregistered}, rosinweed). The quantity of N lost via rhizodeposition amounted to 10–13 kg N ha−1 in the topsoil, but the majority of the N rhizodeposition was found below (25–250 cm) showing the importance of including deeper soil layers in such studies.",
keywords = "N, split-root methodology, Deep-rooted crops, N rhizodeposition, Stable isotope labeling",
author = "Jim Rasmussen and Dresb{\o}ll, {Dorte Bodin} and {L{\o}nne Enggrob}, Kirsten and Leanne Peixoto",
year = "2021",
doi = "10.1016/j.geoderma.2020.114782",
language = "English",
volume = "383",
journal = "Geoderma",
issn = "0016-7061",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - A novel 15N vertical split-root method for in situ estimation of N rhizodeposition

AU - Rasmussen, Jim

AU - Dresbøll, Dorte Bodin

AU - Lønne Enggrob, Kirsten

AU - Peixoto, Leanne

PY - 2021

Y1 - 2021

N2 - Estimates of nitrogen (N) losses from living plants (phyllo- and rhizodeposition) are needed to improve the sustainability of the present agricultural cropping systems. These estimates are hard to achieve under field conditions among others due to a lack of suitable methods to study these N flows. A novel vertical split-root with 15N placement in deeper soils layers is suggested here as a means to improve the present tracer based methods for phyllo- and rhizodeposition estimation. We found enrichment of soil above the point of tracer injection (at 290 cm) with rhizosphere having higher enrichment than bulk soil underlining that 15N was derived from roots. The relative net N rhizodeposition was highest for lucerne and decreased with depth for all three plant species investigated (lucerne, kernza®, rosinweed). The quantity of N lost via rhizodeposition amounted to 10–13 kg N ha−1 in the topsoil, but the majority of the N rhizodeposition was found below (25–250 cm) showing the importance of including deeper soil layers in such studies.

AB - Estimates of nitrogen (N) losses from living plants (phyllo- and rhizodeposition) are needed to improve the sustainability of the present agricultural cropping systems. These estimates are hard to achieve under field conditions among others due to a lack of suitable methods to study these N flows. A novel vertical split-root with 15N placement in deeper soils layers is suggested here as a means to improve the present tracer based methods for phyllo- and rhizodeposition estimation. We found enrichment of soil above the point of tracer injection (at 290 cm) with rhizosphere having higher enrichment than bulk soil underlining that 15N was derived from roots. The relative net N rhizodeposition was highest for lucerne and decreased with depth for all three plant species investigated (lucerne, kernza®, rosinweed). The quantity of N lost via rhizodeposition amounted to 10–13 kg N ha−1 in the topsoil, but the majority of the N rhizodeposition was found below (25–250 cm) showing the importance of including deeper soil layers in such studies.

KW - N, split-root methodology

KW - Deep-rooted crops

KW - N rhizodeposition

KW - Stable isotope labeling

U2 - 10.1016/j.geoderma.2020.114782

DO - 10.1016/j.geoderma.2020.114782

M3 - Journal article

AN - SCOPUS:85095713905

VL - 383

JO - Geoderma

JF - Geoderma

SN - 0016-7061

M1 - 114782

ER -

ID: 252043491