THE EFFECTS OF PLANTING PATTERNS, MINERAL FERTILIZER RATES, AND BIOSTIMULANTS ON NODULE FORMATION IN PEANUT ROOTS
Keywords:
peanut, Salomat variety, nodule bacteria, symbiosis, biological nitrogen, planting pattern, mineral fertilizers, Oxyhumate Extra, Rokogumin, plant nutrition area.Abstract
This article investigates the effects of planting patterns of 70 × 10–1 and 70 × 20–1, mineral fertilization regimes of N60P110K40 and N90P165K65 kg/ha, and biostimulants “Oxyhumate Extra” and “Rokogumin” applied at rates of 1, 2, and 3 L/ha on root nodule formation in the “Salomat” peanut variety under the conditions of irrigated meadow sierozem soils in the Andijan region.
The results obtained in 2021 showed that the average number of root nodules per plant was 31.74, with a nodule mass of 0.392 g per plant under the 70 × 10–1 planting pattern. Under the 70 × 20–1 pattern, these values were 36.54 nodules and 0.452 g per plant, respectively. The wider area available for plant nutrition resulted in increases of 15.1% in nodule number and 15.3% in nodule mass per plant.
The highest values were recorded with the 70 × 20–1 planting pattern, the N90P165K65 kg/ha fertilization regime, and “Rokogumin” applied at 3 L/ha, yielding 43.7 nodules and a nodule mass of 0.51 g per plant. The findings demonstrate that planting pattern and nutritional conditions are important agronomic factors in determining the symbiotic activity of the peanut root system.
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