Pea cultivar and wheat residues affect carbon/nitrogen dynamics in pea-triticale intercropping: a microcosms approach

A Scalise, VA Pappa, A Gelsomino, RM Rees

Research output: Contribution to journalArticle

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6 Downloads (Pure)

Abstract

The underlying mechanisms by which legume cultivars contribute to nitrous oxide (N2O) generation are poorly understood. The aim of the present study was to explore the effects of two pea cultivars (Zero4 and Nitouche) intercropped with triticale, with or without wheat (Triticumaestivum) residues incorporation, on soil C and N dynamics, on bacterial community structure and their linkswithN2O emissions. Monocrops and bare soil (no plant) treatments were used as an additional control in order to account for the level of mineralisation between treatments. Changes in total C and N contents and in some functionally-related soil pools (microbial biomass C and N, basal respiration, KCl-exchangeable ammonium and nitrate, potentially mineralisable N, DOC, ecophysiological indexes) were followed throughout a 97-day microcosm experiment carried out on a loamy arable soil. ARISA community fingerprinting of soil extracted DNA and GHG emissions were carried out at two key stages (pea flowering and harvest). The addition of residues to the soil resulted in only small changes to the total C and N pools the Nitouche monocrop, which was found to have the highest potentially mineralisable N (13.4 μg g−1 28 d−1) of the treatments with added residue. The different pea cultivar selectively affected N2O emissions, with highest emissions associated with the cultivar Nitouche in the absence of residues. The two intercropping treatments of triticale/pea were significantly different either with residues or without, especially the triticale/Zero4 which had the lowest values (356 g N2O-N ha−1). Similar patterns were also observed in belowground data. ARISA analysis showed that monocropped legumes and the Triticale-based treatment clearly grouped on separate clusters to the added residue treatment. We hypothesize that in pea-based intercrops variations in carbon supply from different cultivars may contribute to differences in N2O emissions and thus influence the choice of suitable cultivars, to optimize nutrient cycling and sustainable crop management. © 2017 Elsevier B.V. All rights reserved.
Original languageEnglish
Pages (from-to)436 - 450
Number of pages15
JournalScience of the Total Environment
Volume592
Early online date21 Mar 2017
DOIs
Publication statusFirst published - 21 Mar 2017

Fingerprint

triticale
intercropping
peas
nitrous oxide
wheat
carbon
cultivars
nitrogen
soil
legumes
loam soils
crop management
arable soils
bacterial communities
microbial biomass
biogeochemical cycles
mineralization
community structure
nitrates
DNA

Bibliographical note

1023103

Keywords

  • Bacterial community structure
  • C and N pools
  • N2O emissions
  • Pea-based intercropping
  • Wheat residues

Cite this

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title = "Pea cultivar and wheat residues affect carbon/nitrogen dynamics in pea-triticale intercropping: a microcosms approach",
abstract = "The underlying mechanisms by which legume cultivars contribute to nitrous oxide (N2O) generation are poorly understood. The aim of the present study was to explore the effects of two pea cultivars (Zero4 and Nitouche) intercropped with triticale, with or without wheat (Triticumaestivum) residues incorporation, on soil C and N dynamics, on bacterial community structure and their linkswithN2O emissions. Monocrops and bare soil (no plant) treatments were used as an additional control in order to account for the level of mineralisation between treatments. Changes in total C and N contents and in some functionally-related soil pools (microbial biomass C and N, basal respiration, KCl-exchangeable ammonium and nitrate, potentially mineralisable N, DOC, ecophysiological indexes) were followed throughout a 97-day microcosm experiment carried out on a loamy arable soil. ARISA community fingerprinting of soil extracted DNA and GHG emissions were carried out at two key stages (pea flowering and harvest). The addition of residues to the soil resulted in only small changes to the total C and N pools the Nitouche monocrop, which was found to have the highest potentially mineralisable N (13.4 μg g−1 28 d−1) of the treatments with added residue. The different pea cultivar selectively affected N2O emissions, with highest emissions associated with the cultivar Nitouche in the absence of residues. The two intercropping treatments of triticale/pea were significantly different either with residues or without, especially the triticale/Zero4 which had the lowest values (356 g N2O-N ha−1). Similar patterns were also observed in belowground data. ARISA analysis showed that monocropped legumes and the Triticale-based treatment clearly grouped on separate clusters to the added residue treatment. We hypothesize that in pea-based intercrops variations in carbon supply from different cultivars may contribute to differences in N2O emissions and thus influence the choice of suitable cultivars, to optimize nutrient cycling and sustainable crop management. {\circledC} 2017 Elsevier B.V. All rights reserved.",
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Pea cultivar and wheat residues affect carbon/nitrogen dynamics in pea-triticale intercropping: a microcosms approach. / Scalise, A; Pappa, VA; Gelsomino, A; Rees, RM.

In: Science of the Total Environment, Vol. 592, 21.03.2017, p. 436 - 450.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Pea cultivar and wheat residues affect carbon/nitrogen dynamics in pea-triticale intercropping: a microcosms approach

AU - Scalise, A

AU - Pappa, VA

AU - Gelsomino, A

AU - Rees, RM

N1 - 1023103

PY - 2017/3/21

Y1 - 2017/3/21

N2 - The underlying mechanisms by which legume cultivars contribute to nitrous oxide (N2O) generation are poorly understood. The aim of the present study was to explore the effects of two pea cultivars (Zero4 and Nitouche) intercropped with triticale, with or without wheat (Triticumaestivum) residues incorporation, on soil C and N dynamics, on bacterial community structure and their linkswithN2O emissions. Monocrops and bare soil (no plant) treatments were used as an additional control in order to account for the level of mineralisation between treatments. Changes in total C and N contents and in some functionally-related soil pools (microbial biomass C and N, basal respiration, KCl-exchangeable ammonium and nitrate, potentially mineralisable N, DOC, ecophysiological indexes) were followed throughout a 97-day microcosm experiment carried out on a loamy arable soil. ARISA community fingerprinting of soil extracted DNA and GHG emissions were carried out at two key stages (pea flowering and harvest). The addition of residues to the soil resulted in only small changes to the total C and N pools the Nitouche monocrop, which was found to have the highest potentially mineralisable N (13.4 μg g−1 28 d−1) of the treatments with added residue. The different pea cultivar selectively affected N2O emissions, with highest emissions associated with the cultivar Nitouche in the absence of residues. The two intercropping treatments of triticale/pea were significantly different either with residues or without, especially the triticale/Zero4 which had the lowest values (356 g N2O-N ha−1). Similar patterns were also observed in belowground data. ARISA analysis showed that monocropped legumes and the Triticale-based treatment clearly grouped on separate clusters to the added residue treatment. We hypothesize that in pea-based intercrops variations in carbon supply from different cultivars may contribute to differences in N2O emissions and thus influence the choice of suitable cultivars, to optimize nutrient cycling and sustainable crop management. © 2017 Elsevier B.V. All rights reserved.

AB - The underlying mechanisms by which legume cultivars contribute to nitrous oxide (N2O) generation are poorly understood. The aim of the present study was to explore the effects of two pea cultivars (Zero4 and Nitouche) intercropped with triticale, with or without wheat (Triticumaestivum) residues incorporation, on soil C and N dynamics, on bacterial community structure and their linkswithN2O emissions. Monocrops and bare soil (no plant) treatments were used as an additional control in order to account for the level of mineralisation between treatments. Changes in total C and N contents and in some functionally-related soil pools (microbial biomass C and N, basal respiration, KCl-exchangeable ammonium and nitrate, potentially mineralisable N, DOC, ecophysiological indexes) were followed throughout a 97-day microcosm experiment carried out on a loamy arable soil. ARISA community fingerprinting of soil extracted DNA and GHG emissions were carried out at two key stages (pea flowering and harvest). The addition of residues to the soil resulted in only small changes to the total C and N pools the Nitouche monocrop, which was found to have the highest potentially mineralisable N (13.4 μg g−1 28 d−1) of the treatments with added residue. The different pea cultivar selectively affected N2O emissions, with highest emissions associated with the cultivar Nitouche in the absence of residues. The two intercropping treatments of triticale/pea were significantly different either with residues or without, especially the triticale/Zero4 which had the lowest values (356 g N2O-N ha−1). Similar patterns were also observed in belowground data. ARISA analysis showed that monocropped legumes and the Triticale-based treatment clearly grouped on separate clusters to the added residue treatment. We hypothesize that in pea-based intercrops variations in carbon supply from different cultivars may contribute to differences in N2O emissions and thus influence the choice of suitable cultivars, to optimize nutrient cycling and sustainable crop management. © 2017 Elsevier B.V. All rights reserved.

KW - Bacterial community structure

KW - C and N pools

KW - N2O emissions

KW - Pea-based intercropping

KW - Wheat residues

U2 - 10.1016/j.scitotenv.2017.03.012

DO - 10.1016/j.scitotenv.2017.03.012

M3 - Article

VL - 592

SP - 436

EP - 450

JO - Science of the Total Environment

JF - Science of the Total Environment

SN - 0048-9697

ER -