Effect of Different Levels of Micronutrients Fertilizer on Protein and Basic and Acidic Amino Acids Contents of Grains of SorghumCultivars

Grains of four sorghum cultivars (Tabat, Tetrom, WadAhmed and Gadambellia) were grown for two consecutive seasons under different levels of micronutrients fertilization (0, 2, 4 and 8 g 5kg-1 soil). The protein and basic and acidic amino acids of the grains were investigated. The protein content of both seasons was significantly (P ≤ 0.05) increased with increase in micronutrients dose. However, the grains harvested during the second season had significantly (P ≤ 0.05) higher protein content than that harvested during the first season. The protein content of the cultivar Tabat was increased by 55% as a maximum value during the first season but during the second season it increased by 71% for the cultivar Gadambalia. The basic essential amino acids (histidine, lysine and arginine) and acidic (aspartic and glutamic acid) were significantly (P ≤ 0.05) increased during both seasons with micronutrients dose. Lysine was increased by ˃100% during both seasons for the cultivar Gadambalia.