| Abstrakt: |
This article presents the results of the study of the effect of microelements on the leaf area, dry matter formation and yield of cotton in the conditions of the gray soils of the Zarafshan Valley. The optimal rate of application of microelements had a positive effect on the leaf area and dry mass of cotton plants. The highest result was observed when N250P175K125 +KUPRUMHITE+NANOSEREBRO kg/ha was applied with mineral fertilizer. Objectives: The aim was to change increase several physiological parameters of cotton and thereby obtain a high yield. The purpose of this was to change several physiological indicators of cotton and thereby obtain a higher yield. That is, by increasing the leaf level of cotton, it was possible to accelerate the photosynthesis process, to achieve high productivity by increasing the amount of dry mass. Methods: All analyses, phenological observations, calculations were performed based on generally accepted methodologies [46]. The amount of dry matter was determined by L. G. Tretyakov, A. S. Sulaymonov method by drying in a drying cabinet to a constant mass, and the level of leaves was determined by N. N. Tretyakov, [45] and weighing method. Our research was conducted in the gray soils of Pastdargom district of Samarkand region in 2020-2021. We used the "Omad" variety of cotton in our research. This variety is planted in large areas in Samarkand region. Results: In this case, the optimal rate of application of micronutrients had a positive effect on the leaf surface and dry mass formation of the cotton plant. The highest result was observed when N250P175K125 +KUPRUMHITE+NANOSEREBRO kg/ha was applied with mineral fertilizer. That is, the leaf area was 5285.6 cm2, and the amount of dry matter was 135.3 g, and the yield and it was equal to 45.6 kg\.ha. Conclusions: When using macro and microfertilizers N200P140K100+kuprumkhite+nanocerebro, the leaf area of cotton was equal to 4988.1 cm2, and the dry mass was equal to 129.33 g, and the yield was 43.1 kg\ha was equal to, and it was determined that it increased by 36% compared to the control. [ABSTRACT FROM AUTHOR] |
