Evaluation of cover crop and reduced cultivation for reducing nitrate leaching in Ireland

Journal of Environmental Quality
K V HookerK G Richards

Abstract

Nitrate (NO(3)) loss from arable systems to surface and groundwater has attracted considerable attention in recent years in Ireland. Little information exists under Irish conditions, which are wet and temperate, on the effects of winter cover crops and different tillage techniques on NO(3) leaching. This study investigated the efficacy of such practices in reducing NO(3) leaching from a spring barley (Hordeum vulgare L.) system in the Barrow River valley, southeast Ireland. The study compared the effect of two tillage systems (plow-based tillage and noninversion tillage) and two over-winter alternatives (no vegetative cover and a mustard cover crop) on soil solution NO(3) concentrations at 90 cm depth over two winter drainage seasons (2003/04 and 2004/05). Soil samples were taken and analyzed for inorganic N. During both years of the study, the use of a mustard cover crop significantly reduced NO(3) losses for the plowed and reduced cultivation treatments. Mean soil solution NO(3) concentrations were between 38 and 70% lower when a cover crop was used, and total N load lost over the winter was between 18 and 83% lower. Results from this study highlight the importance of drainage volume and winter temperatures on NO(3) concentra...Continue Reading

Citations

Jul 3, 2013·Environmental Monitoring and Assessment·Jasna Nemčić-JurecAnamarija Jazbec
Nov 19, 2013·The Science of the Total Environment·Alina PremrovKarl G Richards
Oct 9, 2019·Pest Management Science·Roland Gerhards, Alexandra Schappert
Dec 5, 2018·Journal of Environmental Quality·Resham ThapaKatherine L Tully
Jan 21, 2015·Journal of Environmental Quality·C F DruryJ D Gaynor

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