Responsiveness of female sunflower lines on fertilizer application on leached chernozem

In 2010-2012 there were developed the productive methods of fertilizer application at production of maternal lines of sunflower hybrids. There were studied three variants of fertilization: the first one is N30P30 applied during sowing combined with foliar application by Aquarin 5 in doze 3.0 kg/ha in phase of 2-4 pair of leaves formation; the second is application of N30P30 during sowing, and the third is just one foliar application of plants. It increased the yield of maternal lines of sunflower hybrids (VK 678 А, VK 680 А, VА 93 А) in average up to 0.20; 0.15, and 0.06 t/ha, respectively to variants, in comparison with control. The 1000 seeds weight increased on 1.0; 0.7, and 0.5 g, respectively, the amount of formed seeds in head on 108; 81, and 24 seeds, respectively. The oil content in seeds had low dependence on methods and doses of fertilizer application and in average was 43.4-43.8%.