Vegetative Components of Onion (Allium cepa L.) as Influenced by Nitrogen, Phosphorus and Locations
Keywords:Fertilizers, locations, vegetative components, onion
Field trials were conducted using nitrogen (N) (0, 55, 110 and 165 kg ha-1) and phosphorus (P2O5) (0, 45, 90 and 135 kg ha-1) rates in two different locations (Bauchi and Kardam) during the 2003/2004 dry season. In each location, treatments were combined and arranged in a randomized complete block pattern with three replications.Â Results revealed that vegetative components of onion were influenced by nitrogen (N), phosphorus (P2O5) and locations. Significant and progressive increase was recorded in plant height and number of leaves as rates of N and P2O5 increases.Vegetative yield of onion was significantly increasedby N only. Of all the interactions recorded in plant height, number of leaves and vegetative yield of onions, only the interactive effect of nitrogen and location was significant at 5% level. Plants height and number of leaves, irrespective of N-rates, increased significantly and considerably in Kardam flooded valley when 165kg ha-1was applied. This trend was further recorded in vegetative yield at Bauchi.It was therefore concluded that, as much as 165 kg Nha-1 and 135 kg P2O5 ha-1 are needed to increase yield in onion vegetative components in Bauchifadama areas as well as Kardam flooded valley and their related ecologies.
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