Abstract
The article presents the results of experimental work on assessing the yield of sunflower hybrids of different ripeness groups when the levels of mineral nutrition change in the arid conditions of the Lower Volga region. It was found out that due to a small amount of vegetation precipitation and an acute moisture deficit in the second half of the growing season, the highest yield of oilseeds in the Saratov Left Bank is formed by hybrids of early maturing sunflower groups. Of the studied hybrids, the early ripening hybrid Svetlana (2.43 t / ha) was distinguished by the highest yield in arid conditions, the mid-early - EU Savana (2.02 t / ha) and the mid-season - EU Generalis SL (2.14 t / ha). It was revealed that the content of fat in oilseeds increases markedly from early maturing to mid-early and then mid-season sunflower hybrids - from 46.2–52.9 to 48.6–54.4 and up to 51.2–55.4%, respectively. At the same time, the maximum oil content was in variants with the application of mineral fertilizers.
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