Ammonia emission reduction
Defra’s NT26 research programme conducted by ADAS over multiple years showed that urea treated with the urease inhibitor AGROTAIN®, reduced volatilisation losses by 70% on average compared with unprotected urea – leading to more nitrogen being available for crop uptake.
In Ireland, Teagasc (the Agriculture and Food Development Authority) ran a similar multi-site research project. Urea treated with AGROTAIN® reduced ammonia losses from urea by 78.5% on average. The results showed that the ammonia loss from SUSTAIN® was not significantly different to Calcium Ammonium Nitrate.
“Addition of the urease inhibitor Agrotain (25% nBTPT) to solid urea in the grassland and tillage experiments in the NT2605 project on average reduced ammonia emissions by 70% (range 41 – 100%) compared with solid urea”
“The urea based fertilisers, urea and UAS, gave higher ammonia emission rates than the other treatments, with the Agrotain treatments significantly (P<0.05) reducing emissions compared with those from urea”
“The Agrotain treatment also resulted in significantly lower ammonia emission than from the urea only treatment”
“Over all the tillage and grassland experiments in the NT2605 project (31 in total), Agrotain (at rates of 250, 500 and 1000 mg/kg of active ingredient nBTPT) reduced ammonia emissions from solid urea by 70% (range 25-100%)”