Growth,yield components and micronutrient nutrition of field-grown maize (Zea mays L.) as affected by nitrogen fertilization and plant density |
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Authors: | V B Ogunlela G M Amoruwa O O Ologunde |
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Affiliation: | (1) Department of Agronomy, Ahmadu Bello University, P.M.B. 1044 Zaria, Nigeria;(2) Present address: Institut für Pflanzenbau und Pflanzenzüchtung, Universität Kiel, Olshausenstrae 40, D-2300 Kiel 1, FRG |
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Abstract: | Growth and yield components in field-grown maize (Zea mays L.) were enhanced by nitrogen fertilization ranging from 50 to 200 kg N ha–1. Ear diameter, kernel depth, grain: stover ratio, number of ears plant–1, plant height and dry matter production increased as N fertilization rate was increased up to 100 or 150 kg N ha–1. Tasselling in maize was hastened by N fertilization. Increasing plant density from 25000 to 75000 plants ha–1 increased plant height, dry matter production and delayed tasseling but reduced ear diameter, kernel depth, grain: stover ratio and number of ears plant–1. Increased N supply and plant density had no influence on the concentrations of Mn, Zn, Cu, and Fe in ear leaf; except that Mn concentration increased as N fertilization rate was increased up to 150 kg N ha–1. Nitrogen × plant density interactions on the concentrations of the micronutrients in maize ear leaf were not significant. |
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Keywords: | Zea mays L nitrogen fertilization plant density yield components growth micronutrient nutrition |
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