Localisation of nitrate in the rhizosphere of biochar-amended soils

Miranda T. Prendergast-Miller; Michael Duvall; Saran P. Sohi

doi:10.1016/j.soilbio.2011.07.019

Localisation of nitrate in the rhizosphere of biochar-amended soils

Miranda T. Prendergast-Miller^*, Michael Duvall, Saran P. Sohi

^*Corresponding author for this work

Environment and Geography

Research output: Contribution to journal › Article › peer-review

Abstract

A wheat seedling rhizobox approach was used to differentiate between the rhizosphere and non-rhizosphere (bulk) soil amended with low and high rates of biochar (20 and 60 t ha^-1 vs. control). Nitrate (NO₃ ^-) was added as the main nitrogen (N) source because emerging biochar research points to reduced NO₃ ^- loss through leaching and gaseous loss as nitrous oxide. The rhizosphere under the different treatments were distinct (P = 0.021), with greater soil-NO₃ ^- and biochar-NO₃ ^- contents in the high biochar treatment. Biochar addition increased wheat root length ratio (P = 0.053) and lowered root N uptake (P = 0.017), yet plant biomass and N content were similar between treatments. The results indicate localisation of NO₃ ^- within the rhizosphere of biochar-amended soils which has implications for NO₃ ^- loss and improved nitrogen use efficiency.

Original language	English
Pages (from-to)	2243-2246
Number of pages	4
Journal	Soil Biology and Biochemistry
Volume	43
Issue number	11
DOIs	https://doi.org/10.1016/j.soilbio.2011.07.019
Publication status	Published - Nov 2011

Keywords

Biochar
Charcoal
Nitrate
Nutrient availability
Plant root architecture
Rhizobox
Rhizosphere

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10.1016/j.soilbio.2011.07.019

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title = "Localisation of nitrate in the rhizosphere of biochar-amended soils",

abstract = "A wheat seedling rhizobox approach was used to differentiate between the rhizosphere and non-rhizosphere (bulk) soil amended with low and high rates of biochar (20 and 60 t ha-1 vs. control). Nitrate (NO3 -) was added as the main nitrogen (N) source because emerging biochar research points to reduced NO3 - loss through leaching and gaseous loss as nitrous oxide. The rhizosphere under the different treatments were distinct (P = 0.021), with greater soil-NO3 - and biochar-NO3 - contents in the high biochar treatment. Biochar addition increased wheat root length ratio (P = 0.053) and lowered root N uptake (P = 0.017), yet plant biomass and N content were similar between treatments. The results indicate localisation of NO3 - within the rhizosphere of biochar-amended soils which has implications for NO3 - loss and improved nitrogen use efficiency.",

keywords = "Biochar, Charcoal, Nitrate, Nutrient availability, Plant root architecture, Rhizobox, Rhizosphere",

author = "Prendergast-Miller, {Miranda T.} and Michael Duvall and Sohi, {Saran P.}",

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doi = "10.1016/j.soilbio.2011.07.019",

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AU - Prendergast-Miller, Miranda T.

AU - Duvall, Michael

AU - Sohi, Saran P.

PY - 2011/11

Y1 - 2011/11

N2 - A wheat seedling rhizobox approach was used to differentiate between the rhizosphere and non-rhizosphere (bulk) soil amended with low and high rates of biochar (20 and 60 t ha-1 vs. control). Nitrate (NO3 -) was added as the main nitrogen (N) source because emerging biochar research points to reduced NO3 - loss through leaching and gaseous loss as nitrous oxide. The rhizosphere under the different treatments were distinct (P = 0.021), with greater soil-NO3 - and biochar-NO3 - contents in the high biochar treatment. Biochar addition increased wheat root length ratio (P = 0.053) and lowered root N uptake (P = 0.017), yet plant biomass and N content were similar between treatments. The results indicate localisation of NO3 - within the rhizosphere of biochar-amended soils which has implications for NO3 - loss and improved nitrogen use efficiency.

AB - A wheat seedling rhizobox approach was used to differentiate between the rhizosphere and non-rhizosphere (bulk) soil amended with low and high rates of biochar (20 and 60 t ha-1 vs. control). Nitrate (NO3 -) was added as the main nitrogen (N) source because emerging biochar research points to reduced NO3 - loss through leaching and gaseous loss as nitrous oxide. The rhizosphere under the different treatments were distinct (P = 0.021), with greater soil-NO3 - and biochar-NO3 - contents in the high biochar treatment. Biochar addition increased wheat root length ratio (P = 0.053) and lowered root N uptake (P = 0.017), yet plant biomass and N content were similar between treatments. The results indicate localisation of NO3 - within the rhizosphere of biochar-amended soils which has implications for NO3 - loss and improved nitrogen use efficiency.

KW - Biochar

KW - Charcoal

KW - Nitrate

KW - Nutrient availability

KW - Plant root architecture

KW - Rhizobox

KW - Rhizosphere

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JO - Soil Biology and Biochemistry

JF - Soil Biology and Biochemistry

IS - 11

ER -

Localisation of nitrate in the rhizosphere of biochar-amended soils

Abstract

Keywords

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