Динамика азотного режима дерново-подзолистых почв в зоне действия промышленных предприятий
2008
Tarasenko, S.A., Grodno State Agrarian Univ. (Belarus)
Dynamics of nitrogen status of sod-podzolic soils was studied in the activity zone of industrial enterprises in the conditions of the Republic of Belarus. Volume and quantity composition of release of pollutants into air by industrial enterprises were analyzed in Grondo district of Belarus. Soil structure was changed because of gassy technological emission of OSC Grodno-Azot. Content of fixed ammonium and moving nitrogenous of soil has also changed the activity of gassy emission. There were determined the following indices: determination of total nitrogenous by Kjeldahl procedure; fraction composition of nitrogenous by Shkonde's and Koroleva's methods; changeable ammonium with Nessler's reagent; nitrate nitrogen by ionometric method; fixed ammonium by Mogilovkina method; nitrate ability by Krakov method; potentially accessible nitrogen by Semen method. The research results showed that under the action of gas releases containing in the majority of cases the organic matter combustion gases there was taking place the accumulation of total nitrogen in soil till 11-215 kg/ha and its major fractions (mineral on 2-34, light hydrolyzed on 5-72, hard hydrolyzed on 6-105 kg/ha). Structure of faction constitution of soil nitrogen increased on 0,9-5,2% towards its higher mobility. Gaseous emissions of industrial enterprises containing ammonia made it possible to increase the content of non-exchangeable fixed ammonium in soil up to 7-46%, content of exchangeable ammonium – up to 4,9-11,0 mg/kg, content of potentially accessible nitrogen - on 2,4-15,6 mg/kg, and did not influence the content of nitrates, but lowered the quantity of nitrate ability on 14-27%
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