Abstract
Consumption of fertilizers in districts of Slovakia in the period 2006–2015 Water quality in the surface streams is influenced by several factors. One of important information which can help us to solve problems with quality of water in water body is a distribution of point and non-point pollution sources in a river basin and also amount of pollutants released from them to surface streams. An example of a point source of pollution is the outlet from wastewater treatment plants (industry, urban areas, farms, etc.). On the other hand the most significant non-point source of pollution is considered the application of fertilizers in agriculture.
 In this paper we have evaluated consumption of organic and industrial fertilizers in Slovakia in the period 2006–2015. Total (in tonnes) and average (in kg ha-1) consumption of industrial and organic fertilizers was analyzed. In monitored period, the amount of applied organic fertilizers was much higher than the amount of applied industrial fertilizers and in addition a significant part of total fertilizers consumption had nitrogenous fertilizers in a group of industrial fertilizers. In a group of industrial fertilizers during the period 2006–2015 we observed just moderately increasing in their consumption, while in the period 2010–2015 the average amount of applied industrial fertilizers per hectare of agricultural land increased by about 20 kg ha-1. On the other hand, in a group of organic fertilizers we observed a decreasing in consumption of fertilizers.
Highlights
Research of water quality degradation caused by point and nonpoint source pollution plays an important role in protecting the environment sustainability (Lam et al, 2011; Kováčová, 2017)
We have evaluated consumption of organic and industrial fertilizers in all districts of Slovakia during the period 2006–2015
The amount of industrial and organic fertilizers was applied on monitored agricultural land, so for this reason only size of this area was taken into account
Summary
Research of water quality degradation caused by point and nonpoint source pollution plays an important role in protecting the environment sustainability (Lam et al, 2011; Kováčová, 2017). The main non-point sources of pollution are flush waters from agriculture areas with application of industrial and organic fertilizers. Agriculture has been identified as the major contributor of non-point (diffuse) source pollution of water resources (Humenik et al, 1987; Duda, 1993; Behrendt et al, 1999; Lam et al, 2010). Point and nonpoint (diffuse) source pollution becomes a serious problem causing the damage of water quality in many European countries (Lam et al, 2011). These factors can be classified as anthropogenically dependent influences affecting water quality in surface streams
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