EFFECT OF NAPHTHALENE ACETIC ACID, GIBBERELLIC ACID AND BENZYLAMINOPURINE ON GROWTH AND YIELD OF MUNGBEAN [Vigna radiata (L.) Wilczek]

Abstract

The experiment was conducted at the research farm of Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh to study theeffect of NAA, GA and BAP (cytokinin) on growth and yield of mungbean [Vigna radiata (L.) Wilczek] from March to June 2017. BARI mungbean-6 variety was used as test crop.The experiment consisted of 7 treatments viz. NAA (Naphthalene Acetic Acid) 100 ppm, GA 3 (Gibberellic Acid) 150 ppm, BAP (Benzylaminopurine) 100 ppm, GA

150 ppm and BAP 100 ppm, GA 3 150 ppm and NAA 100 ppm, GA 150 ppm and BAP 100 ppm and NAA 100 ppm and Control. The experiment was laid out at randomized complete block design (RCBD) with four replications. Data were recorded on different growth, morpho-physiological characters, yield contributing characters and yield attributes. Most of the cases, GA 150 ppm and NAA 100 ppm gave the best performance. The highest plant height (69.28 cm), highest dry weight plant -1 (26.13 g), crop growth rate (11.57 mg cm ii

3 -2 day -1 at 40 DAS - At harvest), chlorophyll content (1.05 μg g -1 3 3 at 50 DAS), number of pods plant

(23.28), highest number of seeds pod -1 (12.62), highest pod length (8.60 cm), highest seed yield plant -1 (4.37 g), highest seed yield ha -1 (1.31 t ha ), highest stover yield ha -1 (1.65 t ha -1 ), highest biological yield ha -1 (2.96 t ha ) and highest harvest index (44.20%) were obtained from the treatment, T 6 (GA 150 ppm and NAA 100 ppm) where control gave the lowest. GA 150 ppm and BAP 100 ppm also provided the highest number of leaves plant 3 -1 (23.25 at harvest), branches plant -1 (3.10 at harvest), leaf area index (5.67 at harvest) and 1000 seeds weight (46.88 g) where control gave the lowest.