Evaluation of a New Generation of Coated Fertilizers to Reduce the Leaching of Mineral Nutrients and Greenhouse Gas (N2O) Emissions

Agronomy

Steeve Pepin¹  Fatima Zahra Benlamlih¹  Younès Messaddeq²  Lahcen Benomar³  Mohammed S. Lamhamedi⁴ 

[1] Centre de Recherche et d’Innovation sur les Végétaux, Faculté des Sciences de l’Agriculture et de l’Alimentation, Université Laval, 2480 boul., Hochelaga, Québec, QC G1V 0A6, Canada;Centre d’Optique, Photonique et Laser (COPL), Université Laval, 2375 rue de la Terrasse, Québec, QC G1V 0A6, Canada;Forest Research Institute, Université du Québec en Abitibi-Témiscamingue (UQAT), 445 boul. de l’Université, Rouyn-Noranda, QC J9X 5E4, Canada;Ministère des Forêts, de la Faune et des Parcs, Direction de la Recherche Forestière, 2700 rue Einstein, Québec, QC G1P 3W8, Canada;

关键词: coated fertilizers;    leaching;    greenhouse gases;    N₂O emissions;    fertilization;    climate change;   

DOI  :  10.3390/agronomy11061129

来源: DOAJ

【 摘 要 】

The increased use of fertilizers in agriculture and forest and horticulture nurseries contributes to the pollution of water resources and greenhouse gas emissions. The objective of this study is to evaluate a new generation of fertilizers coated with new biodegradable polymers in terms of physical quality, release kinetics, and their effect on reducing nitrate leaching and N₂O emissions and compare them to uncoated fertilizers (Urea, monoammonium phosphate (MAP), and KCl) having the same mineral nutrient concentration. In a peat-based substrate, the release of mineral nutrients was similar in both types of fertilizer. Two hours after application, Urea released 34% more urea than Biodrix N, the difference disappearing after one day. The leaching of cumulative ammonium nitrogen after 20 days was reduced by 40% and 26% respectively by Aminaex and Biodrix N compared to Urea. In a peat-based substrate containing 30% (v/v) of compost, the cumulative nitrate leaching was reduced by 54% by Biodrix N and by 41% by Aminaex compared to Urea. The highest average N₂O flux was observed on the first day for Urea, whereas for Aminaex and Biodrix N, N₂O emissions increased on the third day, reaching a peak of efflux on day 10. A 10-day delay of the N₂O efflux emissions and a longer period of emissions were observed in treatments containing Aminaex and Biodrix N compared to Urea. Cumulative N₂O efflux was 142, 154, and 171 mg m⁻², respectively, for Urea, Aminaex, and Biodrix N over a 20-day period. These new biodegradable polymer-coated nitrogen fertilizers can reduce mineral nutrient leaching in the event of heavy rainfall and lower maximum N₂O emissions in comparison with conventional nitrogen sources.

【 授权许可】

Unknown