Vol. 10, Issue 11 (2021)

Author(s):
Rama Devi Borra, Rajesh Singh and Punnam Chhetri

Abstract:
A field Experiment was laid out during Zaid 2021 at Central Crop Research Farm, Department of Agronomy, SHUATS, Prayagraj (U.P.). The soil of experimental plot was sandy loam in texture, It is nearly neutral in soil reaction (pH 7.2), low in organic carbon (0.58%), available N (238 kg/ha), available P (32.10 kg/ha) and available K (189 kg/ha). The treatment consists of 4 levels of GA₃ (100ppm), GA₃ (200ppm), Ethrel (250 ppm), Ethrel (500 ppm) and 2 levels of fertilization (NPK) 80:40:40, (NPK) 100:50:50 whose effect was observed on sunflower. There were Nine treatments each replicated thrice. The experiment was conducted in Randomized Block Design. The results showed that growth parameters viz. Plant height (128.60cm) at 80 DAS, No of leaves per plant (22.93 g) at 60 DAS and crop growth rate (2.24) at 60 DAS in (NPK 100:50:50 + GA₃ 200 ppm). The Yield parameters viz. Number of seeds per capitulum (370.00), Test weight (38.60), seed yield (1480 kg/ha), stover yield (2903.20 kg/ha), biological yield (4383.20 kg/ha), Gross returns (162800 ₹/ha), Net returns (128252 ₹/ha) and BC ratio (1.26) were recorded maximum with application of (NPK 100:50:50 + GA₃ 200 ppm). Number of unfilled seeds per capitulum (21.63) were recorded maximum with application (NPK 80:40:40 + GA₃100 ppm) and Harvest index (52.63%) were records maximum with application in (NPK 80:40:40 + GA₃ 200 ppm).