Abstract
Leaching of nitrogen from the soil is a natural but unfavorable effect that generates N2O emissions. Exact quantification of nitrogen leakage is a challenging process. Intensive leakage occurs mainly when the soil is without vegetation and under specific climatic conditions. This paper aims to quantify the amount of nitrogen leakage from arable land and grassland, and to estimate N2O emissions in 2017. Estimating the country-specific fraction of leached nitrogen (FracLEACH) is important for the emission balance from this source. Emissions are underestimated when the fraction is low; on the contrary, a high fraction causes overestimation. The internationally recognized fraction is 30%, according to the 2006 Intergovernmental Panel on Climate Control (IPCC) Guidelines. This factor represents the fraction of nitrogen losses compared to total nitrogen inputs and sources. In this study, we analyzed the effects of climatic conditions on agricultural soils in Slovakia to evaluate the area of nitrogen loss through leaching.
Highlights
All forms of nitrogen emitted from the soil have an undeniable environmental impact on a regional and global scale
This was recommended for calculation of nitrous oxide (N2 O) emissions through leaching in the 2006 Intergovernmental Panel on Climate Change (IPCC) Guidelines, which define that for areas with active irrigation and areas where total precipitation is higher than evaporation for a short time, the value of 30% of the proportion of nitrogen leached out of the utilized agricultural land (FracLEACH ) should be used
Leaching of nitrogen from agricultural land represents a considerable source of nitrogen emissions in Slovakia
Summary
All forms of nitrogen emitted from the soil have an undeniable environmental impact on a regional and global scale. It is the subject of monitoring and scientific research and of policy debates that result in national and international mitigation policies and measures. Excessive soil fertilization causes higher nitrogen loss, transfer into the environment, and altered water and air quality [1]. Irrigation and nitrogen fertilization play important roles in crop yield. An appropriate N application rate coupled with suitable irrigation schedules should be implemented to obtain high yields while reducing deep percolation and N leaching in intensively cropped farming practice [2]
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