Keywords:
- cotton
- NPK
- mineral fertilizers
- integrated application
- phenological stages
- synergism
- nutrient use efficiency
Abstract
This study investigates a system of simultaneous integrated application of nitrogen (N), phosphorus (P), and potassium (K) in cotton cultivation. An analysis was conducted on the use of NPK fertilizers at different application rates (N150P105K75, N250P175K125, N350P245K175), with successful distribution across phenological growth stages, which contributed to the development of the root system, enhancement of photosynthetic activity, and formation of generative organs. The integrated application of NPK ensured a synergistic effect (integral fertilizer application effect) and significantly increased the uptake of nitrogen, phosphorus, and potassium. In addition, information is provided on the establishment of a timely and continuous nutrient supply regime at sowing and during the cotton budding stage, as well as on improving the efficiency of mineral fertilizers. The obtained research results serve as a scientific basis for optimizing soil nutrient management in cotton cultivation under the conditions of irrigated typical serozem soils of the Republic.
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