Causes of nitrate leaching from agriculture land in Slovenia
2007
Podgornik, M. | Pintar, M.
英语. In Slovenia, groundwater is significant source of drinking water. It has been widely reported that contamination of groundwater from agricultural non-point source is one of the major pollution problems. The pollution of groundwater in areas of agricultural activity is a result of using of mineral nitrogenous fertilizers in large quantities. Applying excess nitrate fertilizers directly affects ground water quality, especial for NO3-N, which is highly mobile. Non-point loss of NO3-N from fields to water resources however is not caused by one single factor. Rather is caused by combination of factors including precipitation, crop uptake, irrigation, application of fertilizers and soil property. Although Slovenian areas of intensive agricultural have different soil characteristics, different rainfall regime and agricultural practice, their nitrate leaching regime appears to be similar and in majority related to the precipitation and fertilization.
显示更多 [+] 显示较少 [-]斯洛文尼亚语. Podtalnica je v Sloveniji pomemben vir pitne vode. Znano je, da intenzivno kmetijstvo kot netočkovni vir obremenjevanja, predstavlja glavni problem onesna_evanja podzemnih voda. Na kmetijskih zemlji_čih z intenzivno pridelavo prihaja do prekomerne porabe mineralnih gnojil, kar negativno vpliva na kakovost podtalnice. Uporaba du_ičnih gnojil v količinah, ki presegajo zahteve posevkov, poveča izpiranje du_ika v obliki zelo topnega in mobilnega nitrata v globlje plasti tal in podtalnico. V kolik_nem obsegu bo nitrat iz povr_inskih slojev obdelovalnih tal prodrl v podtalje, ni odvisno samo od količine du_ičnih gnojil, ampak tudi od količine padavin, vrste vegetacije, namakanja ter lastnosti tal. Kljub temu, da se v Sloveniji intenzivna kmetijska območja razlikujejo po količini padavin, kmetijski praksi ter talnih lastnostih, je dinamika izpiranja nitrata na vseh območjih predvsem odvisna od vremenskih razmer in gnojenja.
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