Effect of varieties and spacing on growth, physiological attributes and yield of onion under South Gujarat condition

Abstract

The experiment was conducted to find out the effect of spacing and varieties on onion at Navsari Agricultural University during year 2020-21 and 2021-22. The experiment was arranged over 12 treatment combinations comprising of three varieties (V1: GJRO-11, V2: Agrifound Light Red and V3: NHRDF Red-3) and 4 levels of spacing (S1: 15 cm × 7.5 cm, S2: 15 cm × 10 cm, S3: 15 cm × 12.5 cm and S4: 15 cm × 15 cm) in factorial randomized block design (RBD) with three replications. Among the varieties, GJRO-11 variety was superior in growth and physiological parameters viz. plant height, leaf area, crop growth rate, relative growth rate, and absolute growth rate and biomass duration. Whereas, minimum bolting and maximum average bulb weight and marketable bulb yield was recorded in NHRDF Red-3 and lesser days to maturity of plant was recorded in Agrifound Light Red. The higher plant height, leaf area, relative growth rate, absolute growth rate and biomass duration was observed in spacing of 15 cm × 15 cm. Whereas, maximum crop growth rate, average bulb weight and marketable bulb yield and minimum number of bolting, lesser days to maturity was recorded in spacing of 15 cm × 7.5 cm. The maximum average bulb weight was observed in NHRDF Red-3 with 15 cm × 15 cm. whereas, maximum marketable bulb yield was noted in the treatment combination of NHRDF Red-3 with 15 cm × 7.5 cm.