Naslov
Effect of suboptimal nitrogen fertilization rate on leaf chlorophyll content, yield and other agronomic traits of maize populations

Autori
Bukan, Miroslav ; Buhiniček, Ivica ; Palaveršić, Branko ; Sabljo, Ana ; Kozumplik, Vinko

Izvornik
Növénytermelés (0546-8191) 59 (2010); 1-4

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

Ključne riječi
maize; nitrogen; leaf chlorophyll content; yield; recurrent selection

Sažetak
Leaf chlorophyll content (LCC) determined by a portable chlorophyll meter such as CCM-200, or SPAD-502 was proposed earlier as an indicator of plant nitrogen status and for yield prediction. The purpose of this study was to investigate the effect of suboptimal nitrogen fertilization rate of 80 kg N ha-1 on LCC, yield and some other agronomic traits of M3S maize population. LCC was determined by CCM-200 chlorophyll meter at silking in five M3S populations (C0, C1, C2, C3 and C4) obtained by recurrent selection. Differences among populations were highly significant for LCC, grain yield (kgha-1), ear width (mm), grain depth (mm), and 1000 kernel weight (g). Yield increased with later cycle-populations, but the leaf chlorophyll content did not follow the same pattern. Significant negative correlation was determined among LCC and ear width (r=-0.42*), LCC and grain depth (r=-0.34*) and LCC and 1000 kernels weight (r=-0.49**) for the total data set (across all populations). When measured on separate populations, significant positive correlation was determined between LCC and ear length (r=0.91**) for C3 and between LCC and plant height (r=0.88**) for C4 population. Correlation between yield and LCC was not significant. The LCC did not appear to be a reliable indicator of grain yield in our study, and additional studies might be needed.

Izvorni jezik
Engleski

Znanstvena područja
Poljoprivreda (agronomija)

POVEZANOST RADA