The nitrification inhibitor dicyandiamide increases mineralization-immobilization turnover in slurry-amended grassland soil

M Ernfors, FP Brennan, KG Richards, KL McGeough, BS Griffiths, RJ Laughlin, CJ Watson, L Philippot, J Grant, EP Minet, E Moynihan, C Muller

Research output: Contribution to journalConference article

15 Citations (Scopus)

Abstract

Nitrification inhibitors are used in agriculture for the purpose of decreasing nitrogen (N) losses, by limiting the microbially mediated oxidation of ammonium (NH4 +) to nitrate (NO3 −). Successful inhibition of nitrification has been shown in numerous studies, but the extent to which inhibitors affect other N transformations in soil is largely unknown. In the present study, cattle slurry was applied to microcosms of three different grassland soils, with or without the nitrification inhibitor dicyandiamide (DCD). A solution containing NH4 + and NO3 −, labelled with 15N either on the NH4 + or the NO3 − part, was mixed with the slurry before application. Gross N transformation rates were estimated using a 15N tracing model. In all three soils, DCD significantly inhibited gross autotrophic nitrification, by 79–90%.Gross mineralization of recalcitrant organicNincreased significantly with DCD addition in two soils, whereas gross heterotrophic nitrification from the same pool decreased with DCD addition in two soils. Fungal to bacterial ratios were not significantly affected by DCD addition. Total gross mineralization and immobilization increased significantly across the three soils when DCD was used, which suggests that DCD can cause non-target effects on soil N mineralization–immobilization turnover.
Original languageEnglish
Pages (from-to)137 - 149
Number of pages13
JournalJournal of Agricultural Science
Volume152 Supp. S1
DOIs
Publication statusFirst published - 2014

Fingerprint

dicyandiamide
Nitrification
nitrification inhibitors
grassland soils
Immobilization
mineralization
Soil
soil
nitrification
cattle manure
Grassland
dicyandiamido
Agriculture
Ammonium Compounds
Nitrates
Nitrogen
nitrates
oxidation
agriculture
nitrogen

Bibliographical note

1023324
1023321

Keywords

  • Dicyandiamide
  • Grassland
  • Mineralisation
  • Nitrification inhibitors
  • Soil

Cite this

Ernfors, M., Brennan, FP., Richards, KG., McGeough, KL., Griffiths, BS., Laughlin, RJ., ... Muller, C. (2014). The nitrification inhibitor dicyandiamide increases mineralization-immobilization turnover in slurry-amended grassland soil. Journal of Agricultural Science, 152 Supp. S1, 137 - 149. https://doi.org/10.1017/S0021859613000907
Ernfors, M ; Brennan, FP ; Richards, KG ; McGeough, KL ; Griffiths, BS ; Laughlin, RJ ; Watson, CJ ; Philippot, L ; Grant, J ; Minet, EP ; Moynihan, E ; Muller, C. / The nitrification inhibitor dicyandiamide increases mineralization-immobilization turnover in slurry-amended grassland soil. In: Journal of Agricultural Science. 2014 ; Vol. 152 Supp. S1. pp. 137 - 149.
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abstract = "Nitrification inhibitors are used in agriculture for the purpose of decreasing nitrogen (N) losses, by limiting the microbially mediated oxidation of ammonium (NH4 +) to nitrate (NO3 −). Successful inhibition of nitrification has been shown in numerous studies, but the extent to which inhibitors affect other N transformations in soil is largely unknown. In the present study, cattle slurry was applied to microcosms of three different grassland soils, with or without the nitrification inhibitor dicyandiamide (DCD). A solution containing NH4 + and NO3 −, labelled with 15N either on the NH4 + or the NO3 − part, was mixed with the slurry before application. Gross N transformation rates were estimated using a 15N tracing model. In all three soils, DCD significantly inhibited gross autotrophic nitrification, by 79–90{\%}.Gross mineralization of recalcitrant organicNincreased significantly with DCD addition in two soils, whereas gross heterotrophic nitrification from the same pool decreased with DCD addition in two soils. Fungal to bacterial ratios were not significantly affected by DCD addition. Total gross mineralization and immobilization increased significantly across the three soils when DCD was used, which suggests that DCD can cause non-target effects on soil N mineralization–immobilization turnover.",
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Ernfors, M, Brennan, FP, Richards, KG, McGeough, KL, Griffiths, BS, Laughlin, RJ, Watson, CJ, Philippot, L, Grant, J, Minet, EP, Moynihan, E & Muller, C 2014, 'The nitrification inhibitor dicyandiamide increases mineralization-immobilization turnover in slurry-amended grassland soil', Journal of Agricultural Science, vol. 152 Supp. S1, pp. 137 - 149. https://doi.org/10.1017/S0021859613000907

The nitrification inhibitor dicyandiamide increases mineralization-immobilization turnover in slurry-amended grassland soil. / Ernfors, M; Brennan, FP; Richards, KG; McGeough, KL; Griffiths, BS; Laughlin, RJ; Watson, CJ; Philippot, L; Grant, J; Minet, EP; Moynihan, E; Muller, C.

In: Journal of Agricultural Science, Vol. 152 Supp. S1, 2014, p. 137 - 149.

Research output: Contribution to journalConference article

TY - JOUR

T1 - The nitrification inhibitor dicyandiamide increases mineralization-immobilization turnover in slurry-amended grassland soil

AU - Ernfors, M

AU - Brennan, FP

AU - Richards, KG

AU - McGeough, KL

AU - Griffiths, BS

AU - Laughlin, RJ

AU - Watson, CJ

AU - Philippot, L

AU - Grant, J

AU - Minet, EP

AU - Moynihan, E

AU - Muller, C

N1 - 1023324 1023321

PY - 2014

Y1 - 2014

N2 - Nitrification inhibitors are used in agriculture for the purpose of decreasing nitrogen (N) losses, by limiting the microbially mediated oxidation of ammonium (NH4 +) to nitrate (NO3 −). Successful inhibition of nitrification has been shown in numerous studies, but the extent to which inhibitors affect other N transformations in soil is largely unknown. In the present study, cattle slurry was applied to microcosms of three different grassland soils, with or without the nitrification inhibitor dicyandiamide (DCD). A solution containing NH4 + and NO3 −, labelled with 15N either on the NH4 + or the NO3 − part, was mixed with the slurry before application. Gross N transformation rates were estimated using a 15N tracing model. In all three soils, DCD significantly inhibited gross autotrophic nitrification, by 79–90%.Gross mineralization of recalcitrant organicNincreased significantly with DCD addition in two soils, whereas gross heterotrophic nitrification from the same pool decreased with DCD addition in two soils. Fungal to bacterial ratios were not significantly affected by DCD addition. Total gross mineralization and immobilization increased significantly across the three soils when DCD was used, which suggests that DCD can cause non-target effects on soil N mineralization–immobilization turnover.

AB - Nitrification inhibitors are used in agriculture for the purpose of decreasing nitrogen (N) losses, by limiting the microbially mediated oxidation of ammonium (NH4 +) to nitrate (NO3 −). Successful inhibition of nitrification has been shown in numerous studies, but the extent to which inhibitors affect other N transformations in soil is largely unknown. In the present study, cattle slurry was applied to microcosms of three different grassland soils, with or without the nitrification inhibitor dicyandiamide (DCD). A solution containing NH4 + and NO3 −, labelled with 15N either on the NH4 + or the NO3 − part, was mixed with the slurry before application. Gross N transformation rates were estimated using a 15N tracing model. In all three soils, DCD significantly inhibited gross autotrophic nitrification, by 79–90%.Gross mineralization of recalcitrant organicNincreased significantly with DCD addition in two soils, whereas gross heterotrophic nitrification from the same pool decreased with DCD addition in two soils. Fungal to bacterial ratios were not significantly affected by DCD addition. Total gross mineralization and immobilization increased significantly across the three soils when DCD was used, which suggests that DCD can cause non-target effects on soil N mineralization–immobilization turnover.

KW - Dicyandiamide

KW - Grassland

KW - Mineralisation

KW - Nitrification inhibitors

KW - Soil

U2 - 10.1017/S0021859613000907

DO - 10.1017/S0021859613000907

M3 - Conference article

VL - 152 Supp. S1

SP - 137

EP - 149

JO - Journal of Agricultural Science

JF - Journal of Agricultural Science

SN - 0021-8596

ER -