Effect of Date of Sowing and Foliar Application of Salicylic Acid on Seed Yield and Quality of Groundnut (Arachis hypogaea L.) In cv. G2-52
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Date
2017-07
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University of Agricultural Science, Dharwad
Abstract
A field experiment was conducted at the Main Agricultural Research Station (MARS), University of Agricultural Sciences, Dharwad during kharif, 2016 to assess the effect of date of sowing and foliar application of salicylic acid on seed yield and quality of groundnut (Arachis hypogaea L.) in cv. G2-52. The field experiment consisted of four dates of sowing [June 15th (D1), July 7th (D2), August 1st (D3) and August 21st (D4)] and four different dosages [0 (S1), 50 (S2), 100 (S3) and 150 (S4) ppm] of salicylic acid was laid out in split plot design with three replications.
Among all the dates, significantly higher plant height and leaf area were recorded under D1 and D2 dates of sowing. The phenological parameters like days to 50 per cent flowering, days to pod initiation and days to physiological maturity took significantly more number of days with optimum growing degree days, heat use efficiency, total dry matter production and its distribution, chlorophyll content and relative water content for June 15th sowing. Yield and yield attributes like, number of pods per plant (30.02), number of seeds per plant (44.03), shelling per cent (73.92), 100 seed weight (39.79 g), yield per plant (17.51 g), haulm yield (4.74 q/ha), pod yield (4.62 kg plot-1) and pod yield (3,852 kg ha-1) was significantly maximum under D1 date of sowing. Seed quality parameters like germination per cent, root length, shoot length, seedling vigour index and seedling dry weight were also showed significantly maximum in D1 (June 15th) date of sowing.
Significantly higher morpho-physiological parameters, yield and yield components were recorded in S3 (100 ppm), followed by S2, S1 and S4. The similar trend was observed in seed quality parameters. Thus the application of 100 ppm of salicylic acid was optimum to increase the groundnut productivity under D1 date of sowing.