THE YIELD OF POTATO VARIETIES DEPENDING ON MINERAL NUTRITION AND GROWTH REGULATORS SUBSTANCES FOR GROWING TRICKLE IRRIGATION IN THE SOUTH OF UKRAINE

Abstract

Article gives results o f studies with three varieties o f potatoes: early Tiras, middle Slovianka and Zabava which were planted during sum m er on drop irrigation. Three backgrounds were used in researches: without fertilizer (control); Ng0Pg0Kg0 on the top o f the soil; N45P45K45 locally in 0-12 cm soil layer. Also modern growth regulators: diazofit, adaptofit and agrostimulin were used during plants budding. Researches were conducted in educational, scientific and practical center o f Mykolayiv national agrarian university on southern heavy loam black soil during 2010-2012. On the basic parameters years o f researches differed slightly, but they were typical for the south o f Ukraine.Established that it is advisable to grow potatoes all grades, taken in the study o f culture for summer planting and drip irrigation in southern Ukraine. Performance o f bubbles formed substantially constant and depends on the background power.Due to fertilizer regardless o f dose and method o f making tuber yields increased by 43-45%. The use o f growth regulators contributes to further increase productivity.Investigated dose o f fertilizer Ng0Pg0Kg0 on the top o f the soil and N45P45K45 locally in 0-12 cm soil layer form the same pro­ ductivity level.Regarding the structure o f the crop, found that productivity depends on the number o f potato tubers standard under a bush and their average weight.