DINÂMICA E DISTRIBUIÇÃO DOS NUTRIENTES NO PERFIL DE UM LATOSSOLO FERTIRRIGADO VIA GOTEJAMENTO SUBSUPERFICIAL

Produce crops for fertigation, it is important to follow up the dynamics and distribution of nutrients in the soil profile. This practice allows you to establish or adjust the appropriate application of fertilizers and management of irrigation water, and can prevent environmental damage such as soil salinization and contamination of ground water and surface water sources. Starting from the hypothesis that the increase in water depth extends the distribution of nutrients in the soil solution, is aimed in this work to study the dynamics and distribution of nutrients P, K, Mg and Ca in the profile of an Oxisol fertilized via drip subsurface cultivated with sugar-cane. The experiment was carried out in the experimental area belonging to the Federal Institute of Goiás Campus Rio Verde, GO. The experimental design was a randomized block design with four replications. The factors analyzed were three levels of fluid replacement (0, 50 and 100% of field capacity). Soil samples were collected after fertigation installment of finish using a ring with dimensions of 5 cm x 5 cm in diameter. Sampling proceeded layer by layer in equidistant grid points of 5 x 5 cm on a profile of 40 x 40 cm samples totaling 96 in all treatments. The increase in water depth increased amplitude distribution of nutrients in the soil profile thereby increasing the availability of nutrients to the root uptake.