Method for Measuring of N2O Emissions from Fertilized Soil After the Using of Fertilizer Spreader

Abstract

The use of fertilizer spreaders is accompanied by a different quality of work these machines, which can cause local overdosing of the fertilizers. Consequently, there may occur the increased formation of nitrous oxide (N2O) emissions from the soil to the atmosphere. The aim of the paper was to compare the field and the laboratory method, which can be used for measuring of the N2O emissions released from the soil to the atmosphere. For the purpose of emissions measuring the INNOVA devices with measurement system based on the photo-acoustic infrared detection method was used. Experiment was conducted 10 days after the field was fertilized. During experiment were used the VICON RS-L fertilizer spreader and the Calk Ammonium Nitrate fertilizer. There were found statistically significant differences between the size of the application rate and concentration of the N2O emissions released from soil to the atmosphere. No statistically significant differences were found in comparison of this two methods and this fact indicate the possibility to replace the field method by the laboratory method.

Upotreba rasipača đubriva je praćena je različitim kvalitetom rada ovih mašina, što može da dovede do lokalnog predoziranja đubriva. Kao posledica toga može se javiti povećana emisija azotnog oksida (N2O) iz zemljišta u atmosferu. Cilj ovog rada je bio poređenje poljskog i laboratorijskog metoda za merenje emisija N2O, oslobođenih iz zemljišta u atmosferu. Za potrebe merenja emisije korišćen je uređaj INNOVA sa mernim sistemom zasnovanim na metodu foto-akustične infracrvene detekcije. Ogled je izveden 10 dana posle đubrenja parcele. Tokom eksperimenta korišćen je rasipač VICON RS-L za rasipanje azotnog đubriva. Utvrđene su statistički značajne razlike između primenjene norme đubrenja i koncentracije N2O oslobođenog iz zemljišta u atmosferu. Poređenjem ova dva metoda nije utvrđena statistički značajna razlika, što ukazuje na mogućnost zamene poljskog laboratorijskim metodom.