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Agricultural management in vulnerable zones
Klír, Jan ; Kozlovská, Lada
The methodology describes measures for protection of waters against pollution caused by nitrates from agricultural sources in vulnerable zones of the Czech Republic. The methodology clearly describes individual requirements of the 3rd Action Programme of the Nitrates Directive for the period 2012 - 2016 and management rules for reduction of nitrogen losses by leaching into surface water and groundwater. Explanation of the terms used and links to selected professional publications are supplied.
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Good agricultural practice for protection of water against pollution
Klír, Jan ; Kozlovská, Lada
The methodology summarizes the codes of good agricultural practices for protection of waters against pollution caused by nitrates from agricultural sources. The requirements contributing to reduction of nitrogen losses as exclusion of nitrogen fertilization during unsuitable periods, on flooded or frozen soils are concisely described. Further, the recommendations for management of sloping fields, in proximity of surface waters and the principles of fertilizer use respecting soil-climate conditions, nitrogen demand by crops and soil nutritional status are given. Explanation of basic technical terms and references of relevant publications and legislative norms are supplied.
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Monitoring, evaluation and comparison of a nitrate content in vegetables distributed in a network of markets in selected area in the Czech Republic and adjacent regions of Austria
RŮŽEK, Marek
The main aim of this study was to monitor and evaluate nitrate contents in vegetables, offered in the network of markets, from anti-nutritive point of view. The nitrate content was monitored in common vegetable types in the course of a year. The selected supermarkets were used as the source of samples. The ion-selective electrode measurement method was used to set the nitrate content. The analysed samples were provided in Billa markets in Jindřichův Hradec and in Heidenreichstein in Austria. In total 149 samples were analysed, 71 were provided in the Czech markets and 78 in Austria. The leaf and root vegetables were tested, especially lettuce, iceberg lettuce, a carrot, a parsley and a radish. The lowest measured value 21 mg NO3-.kg-1 was taken from the parsley from the Czech Republic. The highest nitrate content was detected in the lettuce also originated from the Czech production and reached 5200 mg NO3-.kg-1. In the final comparison with the neighbouring Austria, the Czech samples have shown, except for the carrot, higher nitrate contents.
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The chemical and physical parameters of precipitation waters in the Stropnicko region.
MORBICEROVÁ, Iveta
This work aimed to evaluate long-term changes of selected chemical and physical parameters of rainwater from their own rain gauge stations Stropnicko. Chemical and physical parameters influence the rate of loss of substance in the landscape through the soil environment. In particular, the amount and concentration of dissolved sulphates and nitrates, affecting the value of the current pH. Samples were taken from their own rain gauge stations Stropnicko. Names of stations from which samples were taken are Horní Stropnice, Nakolice, Paseky and Nové Hrady. Rainfall were measured between the years 2005-2011 and were subjected to chemical analysis.
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