MINERAL FERTILIZATION OF THREE MAIZE LINES OBTAINED BY IRRADIATING SEEDS OF THE EV 8728 VARIETY AT DALOA
KONE KISSOMANBIEN; SORO DOGNIMÉTON; AYOLIE KOUTOUA; GUEI MARTINEZ ARNAULTH; N’ZI AKHISSY CLOTILDE AND KOUADIO YATTY JUSTIN
KONE KISSOMANBIEN: Soil science, Agropedology, University Jean Lorougnon Guédé Daloa BP 150 Daloa, Côte d’Ivoire.
SORO DOGNIMÉTON: Soil science, Agropedology, University Jean Lorougnon Guédé Daloa BP 150 Daloa, Côte d’Ivoire.
AYOLIE KOUTOUA: Soil science, Agropedology, University Jean Lorougnon Guédé Daloa BP 150 Daloa, Côte d’Ivoire.
GUEI MARTINEZ ARNAULTH: Soil science, Agropedology, University Jean Lorougnon Guédé Daloa BP 150 Daloa, Côte d’Ivoire.
N’ZI AKHISSY CLOTILDE: Soil science, Agropedology, University Jean Lorougnon Guédé Daloa BP 150 Daloa, Côte d’Ivoire.
KOUADIO YATTY JUSTIN: Soil science, Agropedology, University Jean Lorougnon Guédé Daloa BP 150 Daloa, Côte d’Ivoire.
ABSTRACT
Maize productivity has been declining sharply in recent years due to the effects of climate change and loss of soil fertility. Maize lines derived from the irradiation of EV 8728 display traits different from those of the parent variety. These new traits (lines 28; 67; 72) are evaluated in a mineral fertilization trial to characterize their mineral requirements. The lines were subjected to increasing doses of nitrogen (N0, 15; 30; 45; 60 and 90 kg/ha), phosphorus (P0; 10; 20; 30; 40 and 50 kg/ha) and potassium (K0; 20; 40; 60; 80; 110 kg/ha). Fertilization with simple N-, P- and K-based fertilizers did not reveal any obvious effect on growth parameters. However, N 15, P10 and K40 for growth, N 60, P30 and K40 for ear weight and N60 K40 for grain number gave the best results. Moreover, with the exception of the EV 8728 control, line 72 showed good growth and production indexes. These results could be improved by making a complete fertilization according to the basic fertility of the soil.
Keywords: Variety, Mineral fertilization, Line, Irradiation.