EFFECT OF PLANTING GEOMETRY, MINERAL FERTILIZATION AND BIOSTIMULANT TREATMENTS ON FLOWERING DYNAMICS OF GROUNDNUT (ARACHIS HYPOGAEA L.)
Keywords:
groundnut, Arachis hypogaea L., Salomat cultivar, flowering dynamics, planting geometry, mineral nutrition, Oksigumat Ekstra, Rokogumin, flower number, reproductive development.Abstract
The study investigated flowering dynamics of groundnut (Arachis hypogaea L.) cv. Salomat under different planting geometries, mineral fertilizer rates and biostimulant treatment variants under irrigated conditions of the Andijan region, Uzbekistan. Two planting patterns, 70 × 10 cm and 70 × 20 cm with one plant per hill, two mineral fertilizer backgrounds, N60P110K40 and N90P165K65 kg ha⁻¹, and foliar treatments with Oksigumat Ekstra and Rokogumin at 1, 2 and 3 L ha⁻¹ were evaluated. The number of flowers per plant was recorded on 7, 10, 13 and 16 July 2021. Foliar application of the biostimulants was carried out on 8 July; therefore, the 7 July observation represented the pretreatment status. Averaged across 14 treatment combinations, flower number under the 70 × 10 cm planting pattern increased from 2.49 flowers plant⁻¹ on 7 July to 26.52 flowers plant⁻¹ on 16 July. Under the 70 × 20 cm pattern, the corresponding values were 2.87 and 30.54 flowers plant⁻¹. The wider spacing produced approximately 15% more flowers throughout the observation period. On 16 July, the mean flower number under N90P165K65 exceeded that under N60P110K40 by approximately 7.2% at 70 × 10 cm and 7.1% at 70 × 20 cm. The highest value, 33.3 flowers plant⁻¹, was recorded under the combination of 70 × 20 cm, N90P165K65 and Rokogumin at 3 L ha⁻¹. However, because differences among treatments were already present before biostimulant application and no analysis of variance was available for the presented dataset, treatment effects are interpreted as descriptive trends rather than statistically confirmed responses. The results indicate that planting geometry and mineral nutrition were consistently associated with flowering intensity of groundnut cv. Salomat.
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