The nitrification inhibitor dicyandiamide increases mineralization–immobilization turnover in slurry-amended grassland soil
| Autor: | Bryan S. Griffiths, K.L. McGeough, Christoph Müller, Fiona Brennan, Jim Grant, Laurent Philippot, E. Moynihan, Karl G. Richards, R. J. Laughlin, E.P. Minet, Cathy J. Watson, M. Ernfors |
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| Přispěvatelé: | Teagasc Agriculture and Food Development Authority (Teagasc), Department of Biosystems and Technology, Swedish University of Agricultural Sciences (SLU), Agroécologie [Dijon], Institut National de la Recherche Agronomique (INRA)-Université de Bourgogne (UB)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement, Ecological Sciences Group, The James Hutton Institute, Agri Food and Biosciences Institute, Food Research Centre, School of Biology and Environmental Science, University College Dublin [Dublin] (UCD), Department of Plant Ecology, Justus-Liebig-Universität Gießen (JLU) |
| Rok vydání: | 2014 |
| Předmět: |
inorganic chemicals
Chemistry [SDV]Life Sciences [q-bio] Heterotroph food and beverages Mineralization (soil science) chemistry.chemical_compound Agronomy Nitrate Environmental chemistry [SDE]Environmental Sciences Soil water Genetics [SDV.BV]Life Sciences [q-bio]/Vegetal Biology Animal Science and Zoology Nitrification Ammonium Autotroph Microcosm Agronomy and Crop Science |
| Zdroj: | Journal of Agricultural Science Journal of Agricultural Science, Cambridge University Press (CUP), 2014, 152, pp.S137-S149. ⟨10.1017/S0021859613000907⟩ |
| ISSN: | 1469-5146 0021-8596 |
| Popis: | SUMMARYNitrification 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 with15N either on the NH4+or the NO3−part, was mixed with the slurry before application. Gross N transformation rates were estimated using a15N tracing model. In all three soils, DCD significantly inhibited gross autotrophic nitrification, by 79–90%. Gross mineralization of recalcitrant organic N increased 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. |
| Databáze: | OpenAIRE |
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