Performance of soybean genotypes as affected by spacing and nitrogen management in Madhupur tract, Bangladesh

The experiment was conducted at the Field Research Site of Bangabandhu Sheikh Mujibur Rahman Agricultural University Gazipur from February to May 2013 to evaluate the performance of soybean genotypes as affected by spacing and nitrogen management. The experiment was laid out in a three factor Split-Plot design with three replications. Two levels of nitrogen (2/3 basal application along with foliar application of 1% urea at flowering stage and 2/3 basal application with top dress of 1/3 urea at flowering stage at the rate of 60 kg ha^-1) and two spacing (30cm × 5cm and 40cm × 5cm) were considered as treatment for the experiment. Four genotypes G1 =BARI Soybean 6, G2 = Bangladesh soybean 2329, G3 = Bangladesh soybean 2331, G4 = Bangladesh soybean 2340) were used in this experiment. Significant effect on plant height, branches per plant, number of pods per plant, number of seed per pods, days to first flowering and Phosphorus uptake were obtained higher productivity of soybean, the treatment having a minimum row spacing of 30cm × 5cm along with 2/3 basal application of N at a rate of 60 kg ha^-1 and a foliar application of 1% urea at flowering stage was found to be the most appropriate combination of treatments for the soybean genotype var. Bangladesh Soybean 2329.

Keywords: Soybean; Genotypes; Nitrogen management; Spacing; Seed yield.