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DIFFERENTIAL SUSCEPTIBILITY OF THREE MAIZE (Zea mays L.) CULTIVARS TO ZINC DEFICIENCY IN THE NORTHERN GUINEA SAVANNA ZONE OF NIGERIA
Abstract:
Field trials were conducted at Samaru over a period of two years 1991/93 to study the differential susceptibility of three maize cultivars (Ag-Kaduna, mega hybrid and T2BSR-Y) to zinc deficiency. The zinc application rates were 0, 1.0, 2-5, 5-0 and 7-5kg Znha-1. There were response in cob length diameter, 1,000 grain weight and grain yield of maize with increase in zinc rates- A zinc rate of l-0kg Znha-1 appeared to be good for optimum yield of maize- Ag-Kaduna appears to be less susceptible to zinc deficiency than the other two varieties- When the nutrient concentrations were compared with zinc rates there appeared a markedly decrease in the concentration of Iron (Fe) and Phosphorus (P) as zinc rate increased- This shows that the absorption of Fe and P in the varieties appear to be the cause of differential susceptibility to zinc deficiency.
DIFFERENTIAL SUSCEPTIBILITY OF THREE MAIZE (Zea mays L.) CULTIVARS TO ZINC DEFICIENCY IN THE NORTHERN GUINEA SAVANNA ZONE OF NIGERIA
