Naslov
Estimation of nitrogen nutrition of winter barley by rapid, field based nitrogen tests.

Autori
Lazarević, Boris ; Karažija, Tomislav ; Petek, Marko ; Safner, Toni ; Rubinić, Vedran ; Poljak, Milan.

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of symposium New Challenges in agronomy / Čeh B. ; Dolničar P. ; Mihelič R. ; Stajnko D. ; Šantavec I. - Ljubljana : SLOVENSKO AGRONOMSKO DRUŠTVO, 2017, 96-102

ISBN
978-961-90884-9-4

Skup
New Challenges in agronomy

Mjesto i datum
Laško, Slovenija, 26.01.2017. - 27.01.2017

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
barley nitrogen fertilization, chlorophyll content index, plant sap nitrate concentrations, leaf nitrogen concentration

Sažetak
The goal of a successful nitrogen (N) management program is to match plant-available N with crop needs. In this study we evaluated the convenience of chlorophyll content index (CCI) and plant sap nitrate (NO3-) test as a rapid field test for estimation of barley crop N status. Eighteen barley varieties were side dressed with 4 different N rates (0, 60, 120 and 180 kg ha-1 KAN (27 % N)). Measurements of CCI, plant sap NO3- concentration, plant N concertation, and dry matter content (DM) were obtained at 4 different measurement times. The responsiveness of measured variables to N fertilization treatments were tested, and the correlation coefficients among plant N concentration, CCI, plant sap NO3- concentration and DM were calculated. Results showed that measurement of both CCI and plant sap NO3- concentration responded to increasing nitrogen fertilization rates. In addition, both CCI and NO3- concentration were positively correlated with the plant N concentration. The highest correlation coefficient (r=0.6769) was found between plant N concentration and plant sap NO3-concentration.

Izvorni jezik
Engleski

Znanstvena područja
Poljoprivreda (agronomija)

POVEZANOST RADA