EFEITO DA ADUBAÇÃO POTÁSSICA SOBRE Meloidogyne incognita NA CULTURA DO MILHO

Abstract

Zea mays is one of the most cultivated crops in the world and is very demanding in quality fertilization to achieve good levels of productivity. However, the loss of productivity in some cases may be linked to phytonematoids, being the species Meloidogyne incognita, one of the responsible for this damage. However, if the plant is in an adequate nutritional balance, it can withstand the damage caused by the nematode, in order to maintain its productive potential. A completely randomized design experiment was carried out in the greenhouse of the Federal Goiano Institute - Campus Urutaí, Goiás. Five doses of KCL (40, 80, 120, 160 and 200 kg.ha-1) with or without presence were tested M. incognita, calculated with equivalence to the soil volume of each pot. Six repetitions were distributed as follows: three repetitions used to collect leaves for nutritional diagnosis as well as root quantification of nematodes and three repetitions for productive evaluations. The variation of KCL doses had no statistical difference comparing plant height, plant diameter, MFPA, MSPA, MFR, chlorophyll and also did not influence the gall index, egg mass index, and nematode quantity per cm3 ground.