| publication name | Effect of nitrogen fertilization and defoliation on yield and yield components of maize . .Proc. 5th conf.Agron . , Zagazig, 13-15 Sept Vol 1,241-252 |
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| Authors | Salwau,M.I.M and Shames El-Din,G.M |
| year | 1992 |
| keywords | |
| journal | |
| volume | Not Available |
| issue | Not Available |
| pages | Not Available |
| publisher | Not Available |
| Local/International | Local |
| Paper Link | Not Available |
| Full paper | download |
| Supplementary materials | Not Available |
Abstract
his study was carried out to determine the effect ofthe combination of four N levels (60,90,120 and 150 kg N/fed.) and five treatments of stripping leaves at 2 weeks after silking on the yield and yield components of maize double hybrid 215 cultivar during 1990 and 1991 seasons. The experiments design was split plot with tour replicates. The results indicated that plant height, ear height, Yeilً and yeild components of maize wore not significantly increased by in creasing N level from 60 to 150 kg/feddan. Whereas stem diameter, number of grains/row and per ear were significantl increased by- increasing N level up to 150 kg/fed. in one season out of two. The application of 120 and 150 kg N/feddan increased the percentage values of oars yield per feddan and grains yield/feddan over the control (60 Kg/fed) by 11.32 and 10.97%, 6.45 and5.19%, respec tively as means of the two seasons. Stripping treatments significaltly decreased ear length, ear diameter, ear yield/plant, grain yield/plant, 100—grains weight, ear yield and grain yield per feddan as compared to without strip ping in the two seasons. Stripping up to topmost ear leaf gave the lowest yield and yield components, but stripping up to one or two leaves below topmoڑt ear leaf had no significant effect on the above characters as compared to without stripping. On the other hand, number of grains/row, number of grains/ear and shelling per centage were significantly increased by stripping treatments in one season only. The interaction between N levels and stripping treat ments gave a sign.ificant effect on ear weight and shelling percent age in one season out of two, but the other characters under study were not significantly affected by the interaction.