Naslov
Nitrates in percolated soil water

Autori
Vidaček, Željko ; Sraka, Mario ; Bogunović, Matko ; Husnjak, Stjepan

Izvornik
Pochvoznanie, Agrokhimiya y Ekologiya (0554-341X) 33 (1998), 5; 46-49

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
water, nitrates, percolated soil water

Sažetak
Lysimetric measurement of water discharge and nitrates concentration (NO3) in percolated soil water was studied at a site in Croatia. In the Garnier lysimeters there were undisturbed Eutric Cambisol, alluvial and pseudogley soils 0.6 m deep. During 1992-1996 the precipitation, water discharge, nitrates concentration in water discharge, fertilization and crop yield were analysed. The precipitation ranged from 769-1008 mm, and the annual discharge was ~17 to 43% of the total precipitation. Fluctuations of nitrates concentration in the percolate vary widely from 1 to 261/litre. The crops winter vetch and rye, maize, winter barley, oilseed rape, clover, Phacelia tanacetifolia and winter wheat were fertilized only with mineral fertilizers. Nitrogen fertilization was from 16- 140 kg a.i./ha. Concentrations of nitrates in soil water percolate above maximum allowable concentrations of 44.3 mg NO3/litre for category I and II of groundwater were often in the cold and humid period of the year and after fertilizing the winter crops with larger quantities of nitrogen.

Izvorni jezik
Engleski

Znanstvena područja
Poljoprivreda (agronomija)

POVEZANOST RADA