A research on productivity of newly created cotton varieties and evaluation of cotton fiber quality indicators

¹ Jizzakh Polytechnic Institute, 130100 Jizzakh, Uzbekistan
² Namangan Institute of Engineering and Technology, 160115 Namangan, Uzbekistan
³ “Tashkent Institute of Irrigation and Agricultural Mechanization Engineers” National Research University, 100000 Tashkent, Uzbekistan

^* Corresponding author: kazakovadilafruz123@gmail.com

Abstract

This article analyzes the productivity of early maturing and new cotton varieties grown in the country. The study was conducted on early ripening and cotton varieties grown in Jizzakh region. At that time, the highest yield was 37.1% in Bukhara-102 variety, and the lowest yield was 30.0% in Sultan variety. Yields in early maturing new varieties averaged 28.9%. The yield of Porloq-4 was 40.9%, and that of С-6779 was 23.0%. Yields of early maturing varieties averaged 33.3%. Porloq-4 and Bukhara-102 varieties have high indicators of early ripening and yield. Physico-mechanical performance of these cotton varieties was analyzed on the basis of HVI (High Volume Instrument) results. From the results we can see that the specific breaking strength of early maturing and new varieties Porloq-4 and Bukhara-102 in cotton fiber was 37.2%, the upper length was 35.5 mm. Then the specific tensile strength of Porloq-4 cotton fiber is 1.8% lower than the average tensile strength, and the upper average length is 5.1 mm higher. The specific tensile strength of Bukhara-102 fiber is 1.9% higher than the average tensile strength, the average length is 5.3 mm less. The short fiber index averaged 7.5% and the elongation at break was 7.9% on average. The short fiber index of the Porloq-4 variety is 3% lower than the average short fiber index, and the elongation index at break is 1.6% higher than the average. We can see that the index of short fibers of Bukhara-102 fiber is 3% higher than the average, and the elongation at break is 1.5% lower than the average.