Nitrogen migration and balance in sod-podzolic soils with different levels of application of nitrogen fertilizer (according to the data of lysimetric research of the Institute of Soil Science and Agrochemistry) | Миграция и баланс азота в дерново-подзолистых почвах при разных уровнях применения азотных удобрений (по данным лизиметрических исследований РУП 'Институт почвоведения и агрохимии')
2011
Pirogovskaya, G.V., National Academy of Sciences. Scientific and Practical Center for Arable Farming (Belarus). Institute for Soil Science and Agrochemistry | Sazonenko, O.P., National Academy of Sciences (Belarus). Scientific and Practical Center for Arable Farming. Experimental Scientific Station on Sugar Beet
In course of the research there were determined qualitative indexes of nitrogen compound inflow with atmospheric precipitation and its migration into sod-podzolic soil of different granulometric composition at different levels of nitrogen fertilization. There was determined nitrogen balance on sod-podzolic soil in case of cultivation of agricultural crops in a crop rotation link. The research was realized in the conditions of the Republic of Belarus in 2002-2005 on a lysimetric station. As a result of realized research it was revealed that with atmospheric precipitation annually there was flown the following: general nitrogen - 21.1 kg/ha, including N-N03 - 9.0, N-NH4 - 12.1 kg/ha. The percent of the filtered atmospheric precipitation through a layer of 1.0-1.5 meter of sod-podzolic soil depended on their granulometric structure and quantity of atmospheric precipitation: in sod-podzolic light loamy soil its size made in a dry year - 2.7%, in a year with optimum humidity - 20.5%; in loose sandy loam – 29.2 and 32.5% respectively. Nitrogen losses at leaching were defined by granulometric texture of soils, quantity of the dropped out and filtered atmospheric precipitations and doses of applied nitric fertilizers. For example, from sod-podzolic light loamy soils annually there was leached out: N-NH4 – up to 0.35 kg/ha, N-NO3 - 0.02-18,6 kg/ha, from sandy - N-NH4 – up to 0.94 kg/ha, N-N03 - 11.53-44.4 kg/ha. Increase of a nitrogen fertilizer dose from 63 up to 93 kg/ha of active ingredient made it possible to increase the losses of saltpetrous nitrogen at leaching with infiltration waters from sod-podzolic light loamy soil on 66.8%; from loose sandy loam - on 49.3%.
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