Nitrogen leaching from soils in the aspect of its balance
Journal Title: Journal of Research and Applications in Agricultural Engineering (ISSN 1642-686X) - Year 2019, Vol 64, Issue 3
Abstract
Nitrogen is the basic element directly affecting plant yielding. This causes that it is widely used as a component of mineral fertilizers. With increased doses of mineral nitrogen, only a certain part of it is used by plants. The rest goes into the environment, polluting the environment. The study attempts to determine changes in the nitrogen content in the arable layer and to determine the nitrogen flux leached from the soil. The research was carried out over a year and a half for three fields with different soils, under different crop conditions. Relations between soil moisture, suction pressure and unsaturated water conductivity were determined for the tested soils. In the mathematical model of water movement in soil, the Richards equation and the equation for the flow of soil solution were used. The source elements of the equations include water and nitrogen uptake by plants. There is a very clear correlation between precipitation and a stream of nitrogen deep into the soil. Soil physical properties play a very important role. The total amount of nitrogen washed out into the soil was determined. It is respectively 14.4 kg• ha-1 for clay soil and 75.5 and 91.4 kg•ha-1 for sandy soils with the same rainfall. In addition, the results were referred to the gross nitrogen balance of the studied fields.
Authors and Affiliations
Anna Kuczuk, Janusz Pospolita
Keywords
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