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dc.contributorSultana, Humairaen_US
dc.contributorTurner, Debraen_US
dc.contributorDavies, Rohanen_US
dc.contributorWalker, Charlieen_US
dc.contributorChen, Delien_US
dc.creatorSuter, Helenen_US
dc.identifier.citationHelen Suter, Humaira Sultana, Debra Turner, Rohan Davies, Charlie Walker, Deli Chen. (16/3/2013). Influence of urea fertiliser formulation, urease inhibitor and season on ammonia loss from ryegrass. Nutrient Cycling in Agroecosystems, 95 (2), pp. 175-185.en_US
dc.description.abstractThis paper reports the results of experiments to determine whether ammonia (NH3) loss can be reduced and nitrogen (N) use efficiency improved by using two relatively new commercial urea formulations rather than granular urea and urea ammonium nitrate. Four nitrogen treatments were applied at a rate of 40 kg N ha−1: granular urea, ‘Green Urea™ 14’ [containing 45.8 % N as urea and ‘Agrotain®’ (N-(n-butyl) thiophosphoric triamide) @ 5 L t−1 of urea as a urease inhibitor], ‘Nhance’, a fine particle spray [containing 46 % N as urea, ‘Agrotain’ @ 1 L t−1 of urea and gibberellic acid (applied at a rate of 10 g ha−1)] and urea ammonium nitrate in solution (UAN) surface applied. Ammonia loss was determined in autumn and spring using a micrometeorological method. In autumn, use of the Green Urea and Nhance reduced NH3 loss from the 30 % of applied N lost from the granular urea to 9 and 23 % respectively. Loss from all treatments in spring was very small (<2 % of applied N), because 4 mm of rain fell within 24 h of application onto an already wet site. The use of the Nhance and Green Urea instead of granular urea did not result in increased agronomic efficiency or recovery efficiency of the applied N, and this is most likely due to the presence of sufficient available N from both fertiliser application and the soil. A 15N study recovered 72.8 % of the applied N in the plants and soil, and showed that 30 % of the total N taken up by the plant was derived from the fertiliser, and 70 % from the soil.en_US
dc.publisherSpringer Verlag (Germany)en_US
dc.sourceNutrient Cycling in Agroecosystems;95,(2013) Pagination 175-185en_US
dc.subjectpasture productionen_US
dc.subjectgreen ureaen_US
dc.subjectn-(n-butyl) thiophosphoric triamideen_US
dc.subjectfine particle sprayen_US
dc.titleInfluence of urea fertiliser formulation, urease inhibitor and season on ammonia loss from ryegrassen_US
dc.typeJournal Articleen_US
cg.contributor.centerFood and Agriculture Organization of the United Nations - FAOen_US
cg.contributor.centerThe University of Melbourne - UNIMELBen_US
cg.contributor.centerIncitec Pivot Limiteden_US
cg.contributor.funderInternational Center for Agricultural Research in the Dry Areas - ICARDAen_US
cg.contributor.projectCommunication and Documentation Information Services (CODIS)en_US
cg.contributor.project-lead-instituteInternational Center for Agricultural Research in the Dry Areas - ICARDAen_US
cg.coverage.regionAustralia and New Zealanden_US
cg.isijournalISI Journalen_US
dc.identifier.statusLimited accessen_US
cg.journalNutrient Cycling in Agroecosystemsen_US

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