Effect of Different Potsassium Rates on the Growth and Productivity of Onion

Abstract

The experiment was conducted during the year 2021 at the Horticultural Orchard, Sindh Agriculture University, TandoJam, to investigate the effect of potassium different rates on growth and productivity of onion, in a three replicated randomized complete block design using plot size 3m x 3.5m (10.5m²). The potassium rate include T₁=Control, T₂ = 20 kg (K) ha^-1, T₃= 40 kg (K) ha^-1, T₄ = 60 kg ha^-1, T₅ = 80 kg (K) ha^-1 and T₆ = 100 kg (K) ha^-1. The present study results were statistically significant for growth and yield of onion. The potassium rates T₆ = 100 kg (K) ha^-1 produced highest growth and yield for all parameters including plant height (52.33 cm), stem girth (55.60 cm), number of leaves plant^-1 (13.00), weight of leaves plant (66.90 g), bulb diameter (6.40 cm), single bulb weight (106.67 g), yield plot^-1 (6.4 kg) and yield ha^-1 (6095.2 kg) was recorded in T₆ = 100 kg (K) ha^-1. The average data was Plant height (48.83 cm), stem girth (53.32 cm), number of leaves plant^-1 (10.00), weight of leaves plant^-1 (63.90 g), bulb diameter (5.73 cm), single bulb weight (93.00 g), yield plot^-1 (5.58 kg) and yield ha ha^-1 (5314.3 kg) recorded in T₅ = 80 kg (K) ha^-1. Whereas the minimum data was Plant height (41.70 cm), stem girth (46.8 cm), number of leaves plant^-1 (6.33), weight of leaves plant^-1 (46.56 g), bulb diameter (3.33 cm), single bulb weight (49.33 g), yield plot^-1 (2.96 kg) and yield ha^-1 (2819.2 kg) recorded in T₁ = Control. It was concluded that T₆ = 100 kg (K) ha^-1 produced better results for all growth and yield parameters as compared to other potassium rates.