Factors controlling the efficacy of DCD to reduce N2O emissions and improve NUE in agriculture evide

• 作 者: David R. Chadwick John R.Williams Laura M. Cardenas Robert M. Rees Antonio Vallejo Matthew Scowen Karina A. Marsden Davey L. Jones Catherine J. Watson
• 机 构: BangorUniversity,Bangor,GwyneddUKADASBoxworth,Cambridge,UKRothamstedResearchNorthWyke,Okehampton,Dev
• 出 处: The 4nd International Workshop on Carbon Sequestration and C
• 发表日期: 2014年9期
• 关键词: nitrification inhibitor DCD N2O fertiliser manure urine

Background There is great potential for the use of nitrification inhibitors (NIs) to improve nitrogen use efficiency (NUE) (Abalos et al.,2014) by reducing the rate of nitrification and formation of nitrate,and limiting potential for nitrogen losses via nitrate leaching,and nitrous oxide (N2O) emissions following denitrification.One of the most commonly researched nitrification inhibitors is dicyandiamide (DCD),and this inhibitor has been used commercially,e.g.for direct application to pasture in New Zealand from 2004 until recently.DCD has shown variable efficacy to reduce direct N2O emissions following a range of nitrogen amendments to soils,with soil and environmental conditions being thought to be major controls of the magnitude of effect.