The effect of nitrification inhibitors on nitrous oxide flux from haplic luvisol soil of DASA® 26/13 and ENSIN® fertilisers in a laboratory experiment
¹Slovak University of Agriculture in Nitra, Faculty of Engineering, Department of Machines and Production Systems, Tr. A. Hlinku 2, 94976 Nitra, Slovak Republic; *Correspondence: firstname.lastname@example.org 2Slovak University of Agriculture in Nitra, Faculty of Engineering, Department of Production Engineering, Tr. A. Hlinku 2, 94976 Nitra, Slovak Republic 3Czech University of Life Sciences Prague, Faculty of Engineering, Department of Agricultural Machines, Kamýcká 129, 16521 Prague, Czech Republic
The aim of the paper was to compare the effects of two very similar fertilisers on nitrous oxide (N2O) flux from soil to the atmosphere in laboratory conditions. The following fertilisers were used: granulated nitrogenous fertiliser DASA® 26/13 with the nitrogen content of 26%, sulphur content of 13%, and nitrogen fertiliser ENSIN® with the nitrogen content of 26%, sulphur content of 13% and nitrification inhibitors dicyandiamide DCD and 1, 2, 4-triazole (TZ). Both fertilisers are produced by the same manufacturer, DUSLO, Inc., Šala, Slovakia. For both fertilisers, there variants of experiments were carried out for application rates equivalent to 0, 250 and 500 kg ha-1. The amount of the N2O emissions released from soil to the atmosphere was measured by a photo-acoustic field gas monitor INNOVA 1412 connected to a multipoint sampler INNOVA 1309. The experiments were conducted for 30 days in laboratory conditions. The fertiliser was incorporated into the soil in sampling tubes to a depth of 80 mm after 24 hours of measurement. Subsequently, after every 24 hours of measurement, another 48 hours was carried out, and this measuring cycle was repeated 10 times. The results of our experiment have confirmed that the fertiliser application rate and type of the fertiliser used have a significant effect on N2O flux and have confirmed the importance of accurate and uniform application of fertilisers in field conditions in order to eliminate the negative environmental effects.