In this report, we pointed out intakes of the nitrogen potassium, calcium, magnesium was influenced by the ratio of nitrate and ammonical-nitrogen in the nutrient solution by the tobacco plant. The analysis (Table 1) showed definitely that an increased proportion of nitrate nitrogen over ammonical nitrogen resulted in a larger percentage of the potassium, calcium and magnesium in most cases, but each increment is different with position of the leaf and the ratio NO_3-N/NH_3-N in the culture soltion.