The determination of potential ammonification in soil by arginine method
Kresovic, M. | Licina, V. (Faculty of Agriculture, Belgrade - Zemun (Serbia and Montenegro))
In this paper investigations were carried out on two soil types (vertisol and brown forest soil) with different doses of applied N-fertilizer: 0, N60, N90, N120 and N250. The potential ammonification in soil was obtained by arginine method. The following properties of soil were determined: pH value, organic C, available NH4-N and mobile-Al. The pH value in vertisol was 3.75-4.07; mobile-Al was 0.67-4.90 mg/100 g; % organic C 1.38-1.46 and the content of available nitrogen was 4.4-11.2 ppm. The amount of released NH4-N by arginine ammonification in this soil type was very low. Correlation coefficients between released NH4-N from arginine and soil pH were (-0.96], mobile Al - (-0.99*], applied fertilizer doses - (-0/95]. In brown forest soil the amount of released NH4-N by arginine ammonification was greater than in vertisol. Correlation coefficients between soil properties and released NH4-N from arginine were not statistically significant.
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