Irrigation regimes for drip irrigation of watermelon in mulched and non-mulched fields

Abstract

In most regions of Uzbekistan, the biological productivity of the climate will decrease by 10-20%, and in some regions by 30-40%, the steppe and semi-desert zones will expand further. Therefore, it is impossible to effectively develop irrigated agriculture without the development and implementation of resource and water-saving technologies aimed at increasing the efficiency of irrigated water use. We carried out our experiments based on the development of optimal irrigation norms for the cultivation of watermelon plants in mulched fields by drip irrigation, keeping the differentiated soil moisture (60...70...60%, 65...75...65%, 70…80...70% and 75…85...75% SAM) in the defined norm. In this case, the soil moisture limit before irrigation is 60...65...70...75% SAM according to the experimental options of 0-20 cm layer in the “planting - shatrik” period and 0-40 cm layer in the “shatrik - bloom” period; The 0-50 cm layer was maintained at 70...75...80...85% SAM during the “bloom - fruit formation” period and the 0-50 cm layer at 60...65...70...75% SAM during the “ fruit formation - ripening” period.