2014/11/12 by BJ Malcolm, KC Cameron, Keith C. Cameron +3 · 3 citations
Agricultural and Biological Sciences · Chemistry · Environmental Science · #Agronomy #Ammonium #Ammonium nitrate #Animal science #Biology #Chemistry #Environmental chemistry #Environmental science #Forage #Leaching (pedology) #Lysimeter #Nitrate #Nitrification #Nitrogen #Phosphorus and nutrient management #Soil Carbon and Nitrogen Dynamics #Soil and Water Nutrient Dynamics #Soil science #Soil water #Urine
paper · pdf · doi:10.1080/00288233.2014.961644
crossref issued 2014/11/12 · crossref published 2014/11/12 · crossref published-online 2014/11/12 · openalex publication_date 2014/11/12 · crossref created 2014/11/13 · crossref published-print 2015/03/01 · openalex created_date 2025/10/10 · crossref deposited 2026/01/25 · crossref indexed 2026/08/05 · openalex updated_date 2026/08/06
Nitrogen (N) leached from the plant‐soil system is an environmental concern. The objective of this study was to quantify N leaching losses from cow urine deposited during grazing of a winter forage crop (kale), and determine the effect of using the nitrification inhibitor dicyandiamide (DCD) to reduce N leaching losses. Fresh cow urine was applied to the surface of large soil monolith lysimeters in late June 2011 at two urinary N deposition rates; 500 and 700 kg N ha −1 (with and without DCD), and compared with losses from lysimeters receiving no urine. Most of the N leaching loss was in the form of nitrate‐N (NO 3 – ‐N), with an average of 25% leached as ammonium‐N (NH 4 + ‐N). Nitrate‐N leaching losses were significantly higher under urine‐treated lysimeters (213 and 380 kg NO 3 – ‐N ha −1 at the 500 and 700 kg N ha −1 rates, respectively) than those without urine (c. 33 kg NO 3 – ‐N ha −1 ). The application of DCD reduced NO 3 – ‐N leaching losses by up to 54%. The results indicate that N leaching losses from winter forage crop systems are high and that the application of DCD can reduce these losses.