Drip irrigation and new fertilizer application technology for cotton variety C-8286 in the condition of global climate change

¹ Cotton Breeding, Seed Production and Agrotechnologies Research Institute (CBSPARI), UzPITI street, Botanika, Kibray district, Tashkent province, 111202, Uzbekistan
² National Research University TIIAME, st. Kori Niyazov, house 39, Tashkent, 100000, Uzbekistan
³ Associate Professor, Ferghana State University, 19 Murabbiylar street, Fergana city, 150100, Uzbekistan

^* Corresponding author: tiqxmmi1977@mail.ru

Abstract

Prior studies have demonstrated that using furrow irrigation to develop the growing stage of upland cotton in Uzbekistan dictates when to schedule irrigation. The paper presents additional research on cotton irrigation timing variety C-8286 and how it affects irrigation crop water productivity and seed-lint yield as well as new fertilizer application technology under furrow and drip irrigation technology. Field research was carried out in silt loam soils of Samarkand province, Uzbekistan, in 2021 and 2022. When developing the irrigation schedule Fc with regard to field water content capacity (Fc), the stages of development from germination to blooming and from blooming to boll creation, and maturity were taken into consideration. The optimal development, growth, and output of seed lint for the. C-8286 cotton variety were achieved in drip irrigation technology with irrigation scheduling of 75-75-70% of Fc, wetting front layer of 50-50-50 cm during the abovementioned three growth stages, respectively where the seed-lint yield totaled 5.20 t ha^-1. Irrigation scheduling of 75-75-70% Fc for cotton variety C-8286 and drip irrigation ought to be regarded as appropriate procedures for both aforementioned types of cotton grown on silt loam soils in Samarkand province and for comparable soil-climatic circumstances of Uzbekistan and Central Asia.