The significance of below-ground fractions when considering N and C partitioning within chickpea (Cicer arietinum L.)

K. Yasmin, G. Cadisch, Elizabeth Baggs

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

The aim of this controlled environment experiment was to quantify the distribution of leaf-fed-N-15 and canopy fed-C-13 within nodulating, non-nodulating or N fertilized non-nodulating Cicer arietinum L. and in their surrounding rhizosphere soil, excluding soil + root respiration. Nodulating chickpea partitioned 32% of its total N and 27% of its total recoverable C below-ground, of which only 50% of N and 36% of C were in the clean root fraction. Non-nodulating chickpea allocated equal recoverable C but slightly less N (28%) below-ground but lost less C from plant induced below-ground respiration. The importance of this below-ground partitioning for crop systems C and N balances is highlighted by their large (45% and 33%, for N and C, respectively) contribution to the total plant derived residue (recyclable) fraction. Recovered N-15 and C-13 were greater (P < 0.05) in the outer-rhizosphere (459 A mu g N-15 and 3.2 mg C-13 core(-1)) than in the inner-rhizosphere soil (detached from roots during freeze-drying; 18 A mu g N-15 and 67 A mu g C-13 core(-1)) in relation with the relative size of these compartments. This highlights the significance of the outer-rhizosphere soil when estimating C and N budgets and quantifying rhizodeposition, and the benefit of a double (N-15, C-13) isotope approach to determine this flow against large background soil C and N pools.

Original languageEnglish
Pages (from-to)247-259
Number of pages13
JournalPlant and Soil
Volume327
Issue number1-2
DOIs
Publication statusPublished - Feb 2010

Keywords

  • Below-ground biomass
  • Cicer arietinum
  • C-13-enrichment
  • N-15-enrichment
  • Rhizosphere
  • Isotope recovery
  • Lolium-Perenne
  • Carbon Distribution
  • Nitrogen-Fixation
  • Natural-Abundance
  • Pasture Legumes
  • Soil System
  • Field Pea
  • Plant
  • N-15
  • Rhizodeposition

Cite this

The significance of below-ground fractions when considering N and C partitioning within chickpea (Cicer arietinum L.). / Yasmin, K.; Cadisch, G.; Baggs, Elizabeth.

In: Plant and Soil, Vol. 327, No. 1-2, 02.2010, p. 247-259.

Research output: Contribution to journalArticle

Yasmin, K. ; Cadisch, G. ; Baggs, Elizabeth. / The significance of below-ground fractions when considering N and C partitioning within chickpea (Cicer arietinum L.). In: Plant and Soil. 2010 ; Vol. 327, No. 1-2. pp. 247-259.
@article{792d5b92485e46c193a57b0160b08ddf,
title = "The significance of below-ground fractions when considering N and C partitioning within chickpea (Cicer arietinum L.)",
abstract = "The aim of this controlled environment experiment was to quantify the distribution of leaf-fed-N-15 and canopy fed-C-13 within nodulating, non-nodulating or N fertilized non-nodulating Cicer arietinum L. and in their surrounding rhizosphere soil, excluding soil + root respiration. Nodulating chickpea partitioned 32{\%} of its total N and 27{\%} of its total recoverable C below-ground, of which only 50{\%} of N and 36{\%} of C were in the clean root fraction. Non-nodulating chickpea allocated equal recoverable C but slightly less N (28{\%}) below-ground but lost less C from plant induced below-ground respiration. The importance of this below-ground partitioning for crop systems C and N balances is highlighted by their large (45{\%} and 33{\%}, for N and C, respectively) contribution to the total plant derived residue (recyclable) fraction. Recovered N-15 and C-13 were greater (P < 0.05) in the outer-rhizosphere (459 A mu g N-15 and 3.2 mg C-13 core(-1)) than in the inner-rhizosphere soil (detached from roots during freeze-drying; 18 A mu g N-15 and 67 A mu g C-13 core(-1)) in relation with the relative size of these compartments. This highlights the significance of the outer-rhizosphere soil when estimating C and N budgets and quantifying rhizodeposition, and the benefit of a double (N-15, C-13) isotope approach to determine this flow against large background soil C and N pools.",
keywords = "Below-ground biomass, Cicer arietinum, C-13-enrichment, N-15-enrichment, Rhizosphere, Isotope recovery, Lolium-Perenne, Carbon Distribution, Nitrogen-Fixation, Natural-Abundance, Pasture Legumes, Soil System, Field Pea, Plant, N-15, Rhizodeposition",
author = "K. Yasmin and G. Cadisch and Elizabeth Baggs",
year = "2010",
month = "2",
doi = "10.1007/s11104-009-0051-9",
language = "English",
volume = "327",
pages = "247--259",
journal = "Plant and Soil",
issn = "0032-079X",
publisher = "Springer Netherlands",
number = "1-2",

}

TY - JOUR

T1 - The significance of below-ground fractions when considering N and C partitioning within chickpea (Cicer arietinum L.)

AU - Yasmin, K.

AU - Cadisch, G.

AU - Baggs, Elizabeth

PY - 2010/2

Y1 - 2010/2

N2 - The aim of this controlled environment experiment was to quantify the distribution of leaf-fed-N-15 and canopy fed-C-13 within nodulating, non-nodulating or N fertilized non-nodulating Cicer arietinum L. and in their surrounding rhizosphere soil, excluding soil + root respiration. Nodulating chickpea partitioned 32% of its total N and 27% of its total recoverable C below-ground, of which only 50% of N and 36% of C were in the clean root fraction. Non-nodulating chickpea allocated equal recoverable C but slightly less N (28%) below-ground but lost less C from plant induced below-ground respiration. The importance of this below-ground partitioning for crop systems C and N balances is highlighted by their large (45% and 33%, for N and C, respectively) contribution to the total plant derived residue (recyclable) fraction. Recovered N-15 and C-13 were greater (P < 0.05) in the outer-rhizosphere (459 A mu g N-15 and 3.2 mg C-13 core(-1)) than in the inner-rhizosphere soil (detached from roots during freeze-drying; 18 A mu g N-15 and 67 A mu g C-13 core(-1)) in relation with the relative size of these compartments. This highlights the significance of the outer-rhizosphere soil when estimating C and N budgets and quantifying rhizodeposition, and the benefit of a double (N-15, C-13) isotope approach to determine this flow against large background soil C and N pools.

AB - The aim of this controlled environment experiment was to quantify the distribution of leaf-fed-N-15 and canopy fed-C-13 within nodulating, non-nodulating or N fertilized non-nodulating Cicer arietinum L. and in their surrounding rhizosphere soil, excluding soil + root respiration. Nodulating chickpea partitioned 32% of its total N and 27% of its total recoverable C below-ground, of which only 50% of N and 36% of C were in the clean root fraction. Non-nodulating chickpea allocated equal recoverable C but slightly less N (28%) below-ground but lost less C from plant induced below-ground respiration. The importance of this below-ground partitioning for crop systems C and N balances is highlighted by their large (45% and 33%, for N and C, respectively) contribution to the total plant derived residue (recyclable) fraction. Recovered N-15 and C-13 were greater (P < 0.05) in the outer-rhizosphere (459 A mu g N-15 and 3.2 mg C-13 core(-1)) than in the inner-rhizosphere soil (detached from roots during freeze-drying; 18 A mu g N-15 and 67 A mu g C-13 core(-1)) in relation with the relative size of these compartments. This highlights the significance of the outer-rhizosphere soil when estimating C and N budgets and quantifying rhizodeposition, and the benefit of a double (N-15, C-13) isotope approach to determine this flow against large background soil C and N pools.

KW - Below-ground biomass

KW - Cicer arietinum

KW - C-13-enrichment

KW - N-15-enrichment

KW - Rhizosphere

KW - Isotope recovery

KW - Lolium-Perenne

KW - Carbon Distribution

KW - Nitrogen-Fixation

KW - Natural-Abundance

KW - Pasture Legumes

KW - Soil System

KW - Field Pea

KW - Plant

KW - N-15

KW - Rhizodeposition

U2 - 10.1007/s11104-009-0051-9

DO - 10.1007/s11104-009-0051-9

M3 - Article

VL - 327

SP - 247

EP - 259

JO - Plant and Soil

JF - Plant and Soil

SN - 0032-079X

IS - 1-2

ER -