YIELD AND YIELD ATTRIBUTES OF LENTIL AS INFLUENCED BY INDOLE-3-ACETIC ACID AND GIBBERELLIC ACID

Abstract

A field experiment was carried out at the research field of Department of Agronomy, Hajee Mohammad Danesh Science and Technology University, Dinajpur-5200 during the period from November 2022 to March 2023 to study the yield and yield attributes of lentil as influenced by indole-3-acetic acid and gibberellic acid. The experiment comprised of two factors namely, Factor (A): doses of indole-3-acetic acid viz. I1= 0 ppm (control), I2= 25 ppm, I3= 50 ppm and I4= 75 ppm and Factor (B): doses of GA3 viz. G1=0 ppm (control), G2= 50 ppm and G3= 100 ppm. The experiment was laid out by randomized complete block design (RCBD) with three replications. It consisted of twelve different treatment combinations. Thus, there were 36-unit plots in this experiment. Among the doses of Indole Acetic Acid (IAA), the maximum number of pods plant-1 (38.82), pod length (0.96 cm), seeds pod-1 (1.83), 1000-seed weight (21.89 g), seed yield (1.29 t ha-1), stover yield (2.69 t ha-1), biological yield (4.00 t ha-1) and harvest index (32.29 %) were recorded in I3 treatment. The minimum number of pods plant-1 (35.72), pod length (0.83 cm), seeds pod-1 (1.62), 1000-seed weight (21.27 g), seed yield (1.03 t ha-1), stover yield (2.43 t ha-1), biological yield (3.47 t ha-1) and harvest index (29.82 %) were observed in I1 treatment, respectively. Among the doses of Gibberellic acid (GA3), the maximum number of pods plant-1 (37.83), pod length (0.92 cm), seeds pod-1 (1.82), 1000-seed weight (21.75 g), seed yield (1.06 t ha-1) and harvest index (31.62 %) were recorded in G2 treatment respectively but stover yield (2.65 t ha-1) and biological yield (3.84 t ha-1) were highest at G3 treatment. The minimum number of pods plant-1 (35.81), pod length (0.89 cm), seeds pod-1 (1.69), 1000-seed weight (21.33 g), seed yield (1.06 t ha-1), stover yield (2.46 t ha-1), biological yield (3.52 t ha-1) and harvest index (29.86 %) were observed in G1 treatment, respectively. In case of interaction effect of dose of IAA and GA3, the maximum number of pods plant-1 (40.67), pod length (0.99 cm), seeds pod-1 (1.90), 1000-seed weight (22.30 g), seed yield (1.43 t ha-1), stover yield (2.77 t ha-1), biological yield (4.19 t ha-1) and harvest index (34.06 %) were recorded in I3G2 treatment. The minimum number of pods plant-1 (35), pod length (0.80 cm) seeds pod-1 (1.60), 1000-seed weight (21.09 g), seed yield (1.43 t ha-1), stover yield (2.77 t ha-1), biological yield (3.29 t ha-1) and harvest index (29.06 %) were observed in I1G1 treatment, respectively. Results indicated that doses of IAA and GA3 had significant influence on most of the growth, yield and yield contributing characters of lentil. Thus, it concluded that medium range of IAA and GA3 might aid in increasing production of lentil.