Effect of potassium through polyhalite on growth and yield of onion Var. CO(ON) 6
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Abstract
Plants require nutrients to grow, so polyhalite is utilized as a natural fertilizer. Its reduced carbon footprint makes it useful in organic farming as well. Because of this context, A field experiment was carried out at the farmer's field in Mattiyampatti village, Dharmapuri district, Tamil Nadu, to evaluate the effect of polyhalite as a potassium source on growth yield parameters of onion using CO(on)6 variety as a test crop during 2022-2023. The experimental soil was sandy loam in texture (Typic Ustropept) with pH of 7.56 and EC of 0.24 dS m-1. The experiment was laid out in randomized block design consisting of twelve treatments and three replications. The recommended dose of nitrogen (60 kg ha-1) and phosphorus (60 kg ha-1) were applied as urea and single super phosphate, respectively. The polyhalite and muriate of potash were used as a potassium source at different levels (10 to 50 kg K2O ha-1) per the treatment schedule. The present study revealed that polyhalite application performed better than muriate potash in all parameters. With respect to the level of applications 40 kg K2O ha-1 as polyhalite registered the maximum growth attributes such as plant height (66.4 cm), number of leaves per plant (34.3), root length (9.63 cm), number of tillers plant-1 (4.78) and chlorophyll content (59.3 SPAD readings), and yield attributes such as number of bulb plant-1 (6.64), single bulb weight (9.69 g), bulb length (4.00 g), neck diameter (3.94 g) and neck thickness (13.82 mm). The minimum responses were observed in absolute control.
Article Details
Article Details
Growth, Muriate of Potash, Onion, Polyhalite, Yield
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