Crescimento de plantas de milho e teor de nutrientes sob doses de níquel com e sem calagem

Abstract

Corn is one of the most cultivated cereals in the world, providing products widely used for food, feed and raw materials for industry, is of great importance their study in order to maintain their nutritional quality especially when dealing with such elements as nickel, which is required in small amounts. This study aimed to evaluate the development of corn plants in increasing doses of nickel with and without liming. The experiment was conducted in a greenhouse at the Faculty of Agronomy and Veterinary Medicine (FAMEV) Federal University of Mato Grosso (UFMT) in Cuiabá / MT during the period March-May 2012. The soil used in the experiment was an Oxisol was a clay texture. The experimental design was randomized blocks in a 5 x 2 factorial arrangement with four replications, totaling 40 parcels, with and without lime and five doses of nickel. The liming and applying nickel interfere in the growth of maize plants, showing a negative effect of increasing doses of nickel on plant development when the Liming is not performed. With liming and in the dose of 2,5 mg nickel dm-3 soil, observed an increase in dry matter production of maize plants approximately 8.32%. It was observed that both the application as liming doses of nickel altered nutrient content in maize plants. Regardless of the part of the plant evaluated was increased levels of nickel with increasing doses in the soil, and a lower content for treatments that were limed. With liming was greater plant growth and no toxicity was observed for nickel until the maximum dose studied, there was an increase in dry matter production at the lowest dose applied.