Title: Urea-triazone N characteristics and uses.
Personal Authors: Clapp, J. G.Author Affiliation: Technical Agricultural Products, Research and Development, Tessenderlo Kerley, Inc., 310 Clapp Farms Road, Greensboro, NC 27405, USA.
Editors: Galloway, J., Cowling, E., Erisman, J. W., Wisniewski, J., Jordan, C.
Document Title: Optimizing nitrogen management in food and energy production and environmental protection. 2nd International Nitrogen Conference, Potomac, Maryland, USA, 14-18 October 2001
Abstract: Urea-triazone nitrogen (N) is a stable solution resulting from a controlled reaction in aqueous medium of urea, formaldehyde, and ammonia which contains at least 25% total N. This N source contains no more than 40%, nor less than 5%, of total N from unreacted urea and not less that 40% from triazone. All other N shall be derived from water-soluble dissolved reaction products of the above reactants. It is a source of slowly available N. In a laboratory trial, the rate of mineralization of urea-triazone was ~66% that of urea after 8 days when incorporated in a Munjor sandy loam. Ammonia volatilization losses of N applied as urea-triazone were ~41% of those from urea on a Cecil sandy loam in the first week after application. N leaching losses through saturated Yolo loam columns of urea-triazone were approximately two thirds that of urea or nitrate-N. This N source has proven to be a safer and more effective material for direct application on plant foliage. Tomato growth was enhanced with foliar application of urea-triazone relative to that obtained from ammonium nitrate or urea. The stability of this N source from potential losses via ammonia volatilization and nitrate leaching when soil applied was also documented by results from university trials. Results are also given of a field study in the USA, on the potential leaf injury effects of urea-triazone N solution on turf grass, agronomic and horticultural crops.
Publisher: A.A. Balkema Publishers
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