Response of Groundnut (Arachis hypogaea L.) to Split and Foliar Application of Potassium in a Vertisol
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Date
2017-08
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University of Agricultural Science, Dharwad
Abstract
A field experiment was conducted to investigate the response of groundnut (Arachis hypogaea L.) to split and foliar application of potassium in a Vertisol at the Main Agricultural Research Station, University of Agricultural Sciences, Dharwad during kharif, 2016. The experiment was laid out with twelve treatments replicated thrice in completely randomized block design.
Pod yield in groundnut was not significantly influenced by different potassium nutrition treatments. However, split application of 150 per cent RDK, half as basal and half at 30 DAS through muriate of potash with 2 per cent foliar spray of potassium sulphate at 60 DAS recorded highest pod yield (3,617 kg ha-1) closely followed by basal application of 150 per cent RDK along with 2 per cent foliar spray of potassium sulphate (3,574 kg ha-1). Split application of 150 per cent RDK through MOP plus 2 per cent foliar spray of SOP at 60 DAS significantly enhanced the oil (47.84 %) and protein (37.98 %) contents in kernel with 6.07 and 6.89 per cent increase, respectively over control. Split and foliar application of potassium significantly increased the uptake of major nutrients. Split application of MOP to groundnut significantly enhanced pod yield and quality of groundnut. The pod yield and quality showed a significant positive correlation with the nutrient concentrations (N, P, K and S) in index leaves before and after foliar application of SOP. The treatment with 150 per cent RDK through muriate of potash in split application (half as basal + half at 30 DAS) plus 1 per cent foliar spray through potassium sulphate at 60 DAS recorded highest B:C ratio (2.65). Thus, split application of 150 per cent MOP + foliar spray of one per cent SOP at 60 DAS is beneficial over basal application of 100 per cent MOP.