Effect of gibberellic acid on seed yield, yield contributing characters and oil content of safflower (carthamus tinctorius L.)
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Date
2021-10-29
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Vasantrao Naik Marathwada Krishi Vidyapeeth, Parbhani
Abstract
The present experiment was undertaken during rabi season of 2020-21 at the experimental farm of All India Co-ordinated Research Project on Safflower, Vasantrao Naik Marathwada Krishi Vidyapeeth, Parbhani. (M.S.) and laboratory work for estimation of oil content was carried out at IIOR Hyderabad to evaluate “Effect of gibberellic acid on seed yield, yield contributing characters and oil content of safflower (Carthamus tinctorius L.)” using varieties PBNS-12, PBNS-40, PBNS-86 and hybrid DSH-185. The experiment was laid out in factorial randomized block design with three treatments and two replications. The different treatments were foliar application of gibberellic acid of various concentrations viz., 100, 200, 300 ppm along with one control. Spraying was done at branching, flowering and seed filling stages of crop growth stages.
Results revealed that, varieties PBNS-12 and PBNS-86 showed significant effect on yield and yield contributing characters i.e. days to 50% flowering, days to maturity, number of effective capitula per plant, number of seeds per primary capitula, capitula diameter, number of primary branches per plant, number of secondary branches per plant, test weight, volume weight, hull content, seed yield per plant, biological yield per plant, seed yield per plot, harvest index.
Similarly, foliar spray of 200 ppm GA3 significantly enhanced yield and yield contributing characters i.e. days to maturity, number of effective capitula per plant, number of seeds per primary capitula, capitula diameter, number of primary branches per plant, number of secondary branches per plant, test weight, volume weight, seed yield per plant, biological yield per plant, seed yield per plot, harvest index except days to 50% flowering and hull content showed non-significant effect. The differences amongst interaction effect were found significant for the test weight of seeds except other seed yield contributing characters.
Similarly, PBNS-86 was significantly superior for oil content and oil yield (kg/ha) than other varieties however, foliar application of 200 ppm gibberellic acid concentration showed significantly highest oil content with positive interaction. The variety PBNS-86 was significantly superior for oil yield but it was found at par with PBNS-12. GA3 200 ppm concentration was significantly superior for oil yield than all other concentrations.