ANALYSIS OF AN EXPERIMENT CARRIED OUT ON THE LINES AND VARIETIES OF FINE FIBER COTTON

Abstract This paper highlights the results of conducted research on the issues of physiological and morphological features of new lines of fine-fiber cotton such as Gossypium barbadense L. L-2006, L-167, L-5440, L-5445, L-1, L-10, L-663, L-450, and varieties like Marvarid, Surkhan-14 and Termez-31 in different conditions of water regime. In fact, in comparing optimal water supply and modeling drought with studying the lines and varieties of fine fiber cotton depending on individual genotype reaction in different levels indicated decreasing water content and intensity of transpiration in the leaves. Moreover, the water deficiency and improving the water holding capacity and density surface of the leaves are considered as physiological and morphological characteristics which contribute to the adaptation of cotton to water deficiency in drought conditions. Besides, lysimetric experiment was carried out with new lines and varieties of fine fiber cotton at the institute of Genetics and Experimental Plan Biology at the Academy of Sciences in Uzbekistan. According to the analysis, the water supply indicated the plants were determined simultaneously in both backgrounds, when the pre-irrigation soil moisture at an optimal water supply background was 70-72% of the water content (field moisture capacity), and according to the background of a simulated drought, it was 48 -50% from the water supply. As a result, water content and intensity of transpiration in the lines and varieties of fine fiber cotton were widely indicated in the below-mentioned tables and diagrams as well as broadly discussed in the conclusion of the research work