Abstract: The experiment was conducted through the period 2007 - 2009 in the region of the town Gen. Toshevo, Dobrogea, Bulgaria. The test was conducted in block method in four repetitions with size of the experimental plot - 25 m2. The tested corn hybrids are divided into 2 groups – early (FAO 200-299) and mid-early (FAO 300-399). In years with unfavorable weather conditions, grain yields were almost equal in both maize groups. In years with favorable conditions for development of the crop, yields on mid-early hybrids have proven different, but early hybrids did not show different productivity. The height of formation of the first cob is affected to a greater extent on the conditions of the year. At high temperatures and drought, due to the early development of the culture, the index is at lower values. In comparison with a year, where the genotype has less influence. Early hybrids released moisture more rapidly, especially in hot and dry conditions and are harvested at a lower moisture level than the standard. Middle-early hybrids were harvested at higher moisture than standard 13%.

maize, Dobrogea, yield, grain moisture

Presentation: poster