Split N application and DMP based nitrification inhibitors mitigate N2O losses in a soil cropped with winter wheat

Abstract Nitrogen (N) fertilization to crops might lead formation and release of reactive N—e.g. nitrate, ammonium, ammonia, nitrous oxide (N 2 O) —, contributing eutrophication, atmospheric pollution, climate change. Use nitrification inhibitors splitting N fertilizer may reduce the O emission from arable soils cropped with winter wheat. We tested different fertilizers treated 3,4-dimethylpyrazol phosphate (DMPP) succinic acid (DMPSA) by applying 180 kg ha ?1 in strategies a full annual field experiment on loamy soil Southwest Germany. A threefold split led an 2.3 O–N (corresponding reduction 19%) compared single application ammonium sulphate nitrate (ASN) ( p = 0.07). rate ASN DMPP resulted 1.9 reduced emissions treatment without NI 33%. Calcium (CAN) DMPSA during vegetation period 38% CAN inhibitor, but this was offset high after harvest, which driven tillage 26% (CAN: 2.9 ; + DMPSA: 2.1 0.11). Among our treatments, twofold efficiently maintained grain yield when traditional system inhibitor. Despite resulting lower protein contents application, should be further investigated as potential compromise between wheat quality optimization protection.