Morpho-physiological and Yield Contributing Characters and Yield of Sesame with 1-Napthalene Acetic Acid (NAA)

Abstract

The experiment was undertaken in the Farm laboratory of Sher-e-Bangla Agricultural University (SAU), Dhaka, during Kharif 1 season, April to July 2013 to examine the response of different levels of foliar application of 1-napthaleneacitic acid (NAA) on morpho-physiology, yield contributing attributes and seed yield of sesame using variety BARI Til 4. The treatments of this experiment consisted of four different levels of NAA viz. A0 = 0 ppm, A1 = 25 ppm, A2 = 50 ppm and A3 = 75 ppm. The research was laid out in single factors Randomized Complete Block Design (RCBD) with four replications. In this study, NAA significantly increased morphological characters- plant height, leaf number plant-1, branch number plant-1, fresh and dry weight of shoot and root other than leaf and branch number plant-1 of at 30 and 40 DAS. As morphological parameters NAA also significantly improves yield contributing characters of sesame-the number of pod plant-1, diameter and length of pod, seed weight plant-1 and plot-1, thousand seed weight compared to without NAA. The foliar application of 50 ppm NAA increased seed yield of sesame (1.22 t/ha) which is consistent with the results of morph-physiological and yield contributing characters of this study. Separately, the higher dose of NAA, 75 ppm failed to produce better results of this experiment including seed yield. These results suggest that NAA shows a positive consequence to increase the seed yield of sesame by changing the plant architecture and biomass production. Based on the present results, it can be suggested that the 50 ppm NAA is appropriate for higher yield of sesame var. BARI Til 4 under the climatic conditions of SAU.