EFEITO DA ADUBAÇÃO NITROGENADA NOS DANOS CAUSADOS POR Meloidogyne incognita NA CULTURA DO MILHO

Abstract

Brazil is the third largest corn producer in the world, where a crop is affected by more than 40 species and 12 genre of nematodes, with Meloidogyne incognita being recognized as one of the most important causes of damage to corn. However, nitrogen fertilization is expected to be able to give a good vigor to corn plants, consequently these plants achieve a better vigor after the damage caused by the nematode. In a randomized block design, an experiment is carried out in the greenhouse at Instituto Federal Goiano - Campus Urutaí, Goiás. Testing 6 doses of Urea (0, 80, 120, 160, 200 and 240 kg ha-1) with absence or presence of M. incognita, calculated according to the soil volume of each pot. Six repetitions were used, arranged as follows: three repetitions were used for leaf collection for nutritional diagnosis and three for nematological assessments. The presence of the nematode was able to interfere with plant height and stem diameter of corn plants, however, the dose of 240 kg N/ha-1 was effective in reducing the M.incognita population in the roots.