ABSTRACT) and two rates of cocktail micronutrient mixtures. These were tested in a randomized complete block design with three replications and the treatments were factorially combined. The results from the study revealed that micronutrients application increased the lysine and tryptophan content of the QPM varieties since values were increased by it. The result showed that addition of nitrogen fertilizer and micronutrients increased the crude protein content of the maize varieties and so also with micronutrients addition the QPM varieties differed significantly from each other with respect to lysine and tryptophan contents (p< 0.05).It can be inferred from this that though normal maize and QPM varieties could be exposed to the same environmental conditions and take up same amounts of micronutrients, the QPM varieties have genetic capacity to synthesize high levels of amino acids and so would have nutritionally higher quality grains. Plant breeders therefore may found this attribute useful in genetic manipulation and cultivar development for enhance protein biochemical components.
The greenhouse experiment was conducted at the greenhouse of the Institute for Agricultural Research in Samaru (11 o 11' N, 7 o 38'E) within the northern Guinea savanna ecological zone of Nigeria to study the effects of nitrogen and micronutrients on growth and yield of maize. The study was conducted to determine the effects of different nitrogen levels combined with four micronutrients on growth and yield of maize varieties in the Northern Guinea Savanna, to establish the impacts of nitrogen and micronutrients blends on yield of maize. The greenhouse treatments consisted of four rates of nitrogen fertilizer (0, 50, 100 and 150kgNha-1), two rates of micronutrients (0, cocktail mixtures) Cu, Fe, Zn, B and Mo and four maize varieties SAMMAZ 14 and SUSUMA (QPM) and SAMMAZ 11 and SAMMAZ 12 (normal maize) which gave a total of thirty-two (32) treatments with basal application of 60kgha-1 P as P2O5 and 60kgha-1 K as K2O. These were tested in a Completely Randomized Design in the greenhouse with three replications with a total of 96pots. The fertilizer treatments were factorially combined. The result revealed that micronutrients application enhanced the performance of the QPM than the normal maize. SUSUMA variety (QPM) was superior in performance than SAMMAZ 14 (QPM) in that it produced taller plants (65.50 cm), more number of leaves (12.75) and higher dry matter yield of 6.67g/pot at low application of nitrogen (50kgNha-1). Farmers can therefore adopt the QPM varieties (SUSUMA and SAMMAZ 14) since it is easy to cultivate like the normal maize in the same environment and climatic conditions with higher yield and of more quality than the normal maize.
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