To determine the maximum copper dose that may be applied to the corn seeds without prejudice to the emergence, a trial, in greenhouse condition and completely randomized design, was accomplished. Corn seeds were treated with copper sulphate solution and their doses were: 0.00;1.00; 2.00; 4.00 and 6.00g of copper per kg of seed. The data showed that the copper application on corn seeds damaged seeds emergence, while the dosage of 5.09g copper per kg of seed was the most harmful. Treatments with more than 4,00g of copper per kg of seeds showed copper toxicity sympthoms, although they did not affect the plants dry mass.
micronutrients; micronutrients fertilization; emergence seeds
