Effect of Plant Growth Regulators on Growth and Yield of Onion (Allium cepa L.)

Abstract

A field experiment entitled “Effect of Plant Growth Regulators on Growth and Yield of Onion ( Allium cepa L.)” was conducted during two consecutive years 2019-20 and 2020-21 in rabi season at Agriculture Research Farm, Veer Bahadur Singh Purvanchal University, Jaunpur( U.P) to study the effect of plant growth regulators on growth and quality of onion ( Allium cepa L.) . The trial was laid down in randomized block design (RBD) with three replications and ten treatments viz. T1- Control- Distilled Water, T2. GA3- 50 ppm, T3. GA3- 100 ppm, T4. GA3- 150 ppm, T5- NAA – 50 ppm, T6- NAA- 100 ppm, T7- NAA – 150 ppm, T8- Kinetin- 50 ppm, T9- Kinetin- 100 ppm, T10- 150 ppm . Study results revealed that, there was significant statistical variation in plant height (cm), Number of leaves per plant , collor width ( cm) collar width (cm ) Polar Diamter ( cm ) Equatorial diameter (cm) , Yield per plot, Marketable yield, Total yield ( q/ ha). Basis on the pooled the data study result revealed that maximum plant height(34.05cm at 30 DAT, 51.15 at 60 DAT and 69.90 cm DAT) , number of leaves(6.60 at 30 DAT, 8.90 at 60 DAT and 13.60 at 90 DAT) , Fourth leaf length ( 23.60 cm at 30 DAT, 45.0 cm at 60 DAT and 48. 93 cm at 90 DAT) fourth leaf width( 0.52at 30 DAT, 1.32 at 60 DAT, 1.70 at 90 DAT) , collor width ( 1.24 m), Equatorial diameter ( 6.35), Polar diameter (5.75 cm), Bulb weight ( 41.02) , Bulb yield per plot ( 2.71 kg), marketable yield ( 257.21) and yield per ha. (270.75q).