Nitrate leaching risk from the agricultural soils - case study Lehnice | Riziko vyplavovania dusičnanov prípadová štúdia Lehnice
2007
Takáč, J., Výskumný ústav pôdoznalectva a ochrany pôdy, Bratislava (Slovak Republic)
The main objective of this paper is to evaluate the nitrate leaching risk from the farm Lehnice as well as to evaluate its spatial variability. The study is based on the simulation by agroecological model DAISY. Simulations were carried out for usual crop rotation and local management practise. Maize was the dominating crop in the simulated crop rotation. Autumn as well as spring application of manure was considered and compared. All simulations were carried out with and without irrigation. It was concluded that the nitrate leaching is determined in the first order by soil properties. Leaching frequently arises in the winter half year. In the summer half year, leaching occurs rarely due to generally large evaporative demand and water deficiency. Irrigation forces crop growth and higher crop nitrogen uptake and in this way irrigation helps to reduce nitrate leaching.
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