Naslov
Horizontal and vertical nitrate-nitrogen distribution under different nitrogen fertilization levels

Autori
Jurišić, Aleksandra ; Mesić, Milan ; Šestak, Ivana ; Zgorelec, Željka

Izvornik
Novenytermeles/Crop production (0546-8191) 62 (2013), Supplement; 29-32

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

Ključne riječi
soil; nitrate-nitrogen; micro spatial distribution

Sažetak
The importance of nitrate (NO3-) in the internal nitrogen cycle of arable soils has been widely recognized, especially because of accumulation of nitrate-nitrogen in the soil profile and its implications for the environment. In order to determine vertical and horizontal nitrate-nitrogen distribution, soil samples were collected from a long term experimental field located in central part of Croatia (Popovaca). Soil sampling was conducted during vegetation of maize (June, 2007) on four fertilization treatments (0, 100, 200, 300 kg N ha-1) and at 8 depths (up to 2 m). Spatial variability was mapped using ArcView geographic information system (GIS). Ordinary kriging was used as interpolation method. To characterize spatial variability, spherical (with logarithmic transformation) model were fitted to calculate semivariograms. Also, results indicate that the content of nitrate-nitrogen significantly varied depending on the depth and treatment.

Izvorni jezik
Engleski

Znanstvena područja
Poljoprivreda (agronomija)

POVEZANOST RADA