EFFECTS OF GROWTH REGULATOR AND NITROGEN ON THE YIELD AND YIELD CONTRIBUTING CHARACTERS OF FRENCH BEAN (Phaseolus vulgaris L.J )

Abstract

The experiment was conducted at the farm of Sher-e-Bangla Agricultural University, Dhaka, to study the effect of TAA and nitrogen on the growth, yield and yield components of French bean during the period from November 2006 to February 2007. The experiment included two factors, Factor A: lndole-3 Acetic Acid (0, 5 and I 0 ppm) and Factor B: nitrogen (0, 50, 100 and 150 kg/ha). The experiment was laid out in a Randomized Complete Block Design (RCBD) with three replications. The cultivar of French bean used in the experiment was BARI Zhar Sheem-1. Germination percentage revealed that application of nitrogen at basal dose inhibited the seed germination to some extent, but it was not statistically significant. Plant height and number of leaves per plant varied significantly at 15, 25, 35 and 45 days after sowing (DAS) due to application of lAA, nitrogen and their interactions. Leaf length and breadth varied significantly due to application of IAA and nitrogen. The yield components varied significantly due to application of IAA and nitrogen. The highest pod yield of 18.77 t/ha was obtained from 10 ppm IAA with 100 kg r /ha and the lowest (9.91 t/ ha) yield was obtained from control. The highest (Tk.214905) net return was obtained from application of 10 ppm IAA and I 00 kg N/ha and the lowest (Tk.78667) in control treatment. The highest (3.52) benefit cost ratio was obtained due to application of l 0 ppm fAA and 100 kg N/ha, while the lowest (1.98) in control treatment. The results revealed that application of IAA and nitrogen at different levels had positive impact on growth, yield and yield components of French bean.