Abstract
Growth and yield response of soybean variety TGX 1448-2E to various fertilizer inputs was assessed in a field experiment at the Teaching and Research Farm of the Federal University of Technology Minna during the 2010 rainy season. Treatments consist of five fertilizer combinations as follows: Zero fertilizer application at 0 kg Pha-1, Rock phosphate at 30kg P ha-1, single super phosphate at 30kg P ha-1, a combination of single super phosphate at 30kg P ha-1 and Urea at 20kg N ha-1 and Combination of single super phosphate at 30kg P ha-1 and Agrolyser at 900g ha-1. The experimental layout was arranged in a randomized complete block design with three replicates. Results revealed that plants supplied with P fertilizers either in sole or combined form had significant growth improvement compared with their unfertilized counterparts. TGX 1448-2E produced the best growth response especially when SSP was combined with either urea or agrolyzer implying that the inclusion of urea increased dry matter accumulations. Agrolyzer inclusion on the other hand probably improved uptake and translocation of nutrients and assimilates. SSP alone improved plant and shoot biomass than rock phosphate alone compared with the control treatment. This may be because of the solubility of SSP in water. Obviously, TGX 1448-2E grew better when SSP was supplied at the rate of 30 kg P ha-1 than when Rock phosphate was applied at the same rate. To obtain a yield of 2104kg ha-1, TGX 1448-2E will need a fertilizer combination of SSP at the rate of 30kg Pha-1 and Urea at the rate of 20kg N ha-1
Keywords:
alfisol
fertilizer levels
soybean variety. southern guineasavannah
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