The effect of nitrification inhibitors on nitrous oxide flux from haplic luvisol soil of DASA® 26/13 and ENSIN® fertilisers in a laboratory experiment

T. Šima¹,*, L. Nozdrovický¹, K. Krištof¹, M. Dubeňová² and J. Krupička³

¹Slovak University of Agriculture in Nitra, Faculty of Engineering, Department of Machines and Production Systems, Tr. A. Hlinku 2, 94976 Nitra, Slovak Republic; *Correspondence: tomasko.sima@gmail.com 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

Abstract:

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.

Key words:

application rate., fertilising, nitrification inhibitors., nitrous oxide, soil emissions

Effect of the nitrogen fertiliser rate on the nitrous oxide flux from haplic luvisol soil in the laboratory experiment

T. Šima¹,*, L. Nozdrovický², K. Krištof³, M. Dubeňová⁴ and J. Krupička⁵

1,2,3Slovak University of Agriculture in Nitra, Faculty of Engineering,Department of Machines and Production Systems, Tr. A. Hlinku 2, 94976 Nitra,Slovak Republic;
*Correspondence: tomasko.sima@gmail.com
⁴Slovak University of Agriculture in Nitra, Faculty of Engineering, Departmentof Production Engineering, Tr. A. Hlinku 2, 94976 Nitra, Slovak Republic
⁵Czech University of Life Sciences Prague, Faculty of Engineering, Departmentof Agricultural Machines, Kamýcká 129, 16521 Prague, Czech Republic

Abstract:

The aim of the experiment was to study the effect of the variable rate of nitrogenfertiliser on the amount of nitrous oxide (N2O) flux from the soil within a laboratoryexperiment. We have conducted experiments for 30 days under laboratory conditions in order toeliminate the effect of field factors which could affect the results. During the experiment thenitrogen fertiliser DASAMAG® (manufacturer DUSLO, Inc., Slovakia) was used. The haplicluvisol soil properties were determined by pedological analysis. The amount of N2O emissionsemitting from soil was measured by photo-acoustic field gas monitor INNOVA 1412 withmultipoint sampler INNOVA 1309. There were carried out 3 variants of the experiment(application rates 0, 500 and 1,000 kg ha-1) with two replications. The fertiliser wasincorporated into the soil in sampling tubes to a depth of 80 mm after 24-hours measurement.Subsequently, after every 24 hours of measurements, 48 hours rest was carried out, and thismeasuring cycle was repeated 10 times. During the experiment the concentration of emissionsin sampling tubes considerably varied in comparison with the emissions concentration beforefertilising. Maximum values were measured on the 24th day after incorporation of fertiliser forboth application rates. The results of our experiment show that the application rate of fertiliserhas a significant effect on N2O flux and have confirmed the importance of the accurate and evenfertilisers application in order to eliminate the negative environmental effects.

Key words: