Effect of mineral fertilizers on yield three maize inbred lines of different vegetation duration

Abstract

The trials were carried out in the experimental field of the Mize Research Institute. Zemun Polje during 1998 and 1999. Three maize inbred lines (L1, L2 and L3)of different vegetation duration (FAO maturity groups 300, 500 and 700) were observed. The mineral fertilizer was applied in four variants: I - control without the mineral fertilizer application: II - P205/K2O 60 kg/ha, N 120 kg/ha; III - P,O3/K2O 60 kg/ha, N 180 kg/ha; IV - P2O5/K2O 60 kg/ha, nitrogen fertilizing based on the N min method (with addition up to 120 kgN/ha). The greatest grain yield (4.56 t/ha) detected in inbred L1 (FAO 300). was highly significantly different than the corresponding values in lines FAO 500 and 700 (2.89 and 2.31 t/ha). The grain yield was significantly higher than in II, III and IV variants of fertilizing than in control (for 20.95% in IV, 15.77% in II and 12 97% in III variants). The greatest grain yield in all three inbred lines was detected in the III variant (N min). Interaction between grain yield and fertilization rates depended on genotypes. .

Keywords

• mineral fertilizer
• nitrogen
• maize inbred lines
• yield