WATER REGIME AND EFFICIENCY OF GROWING SUNFLOWER HYBRIDS DEPENDING ON THE ELEMENTS OF DRIP IRRIGATION TECHNOLOGY

The article presents the results of experimental research on influence micro-irrigation system designs water regime, productivity, and efficiency sunflower cultivation. Based this, main economic parameters agrotechnologies cultivation were calculated. Short-term field was carried out in period 2020-2022 lands Brylivske Institute Water Problems Reclamation National Academy Agrarian Sciences (Kherson Region, Dry Steppe subzone). Analytical statistical methods used to process data. scheme experiments provided different options for laying irrigation pipelines systems (in horizontal vertical planes) implementation a pulsed supply mode (standard). control variant without irrigation. According studies, it proved that method significantly affects formation soil regime yield hybrids conditions Steppe. It has been established introduction subsurface drip is more appropriate than hybrids, which explained by drought resistance this crop. When growing sunflowers, with almost identical at lower plant consumption coefficients. 
 minimum coefficient (1077,8 m3/t) obtained implementing pulse mode. highest agricultural technology irrigation: conditionally net profit (17,11-18,17 thousand UAH/ha), cost (11,03-10,90 UAH/ton), also higher level production profitability (31,10-32,62%) (laying every 1,0 m, regardless hybrid). Due grain specific savings supply, achieved: gross income amounted 80,51 UAH/ha, – 21,24 1 ton - UAH 10,6 35,8%.