Fertilidade do solo em áreas cultivadas com cana-de-açúcar na região da Grande Dourados

Abstract

The sugar cane is a semi-perennial crop which can stay in the field up to 7 years after planting, but is necessary a good quimical conditions of the soil to guarantee the success and longevity of this cultures. the objective of this study is to evaluate the fertility levels of sugar cane in cultivated soils in the Grande Dourados region. Were evaluated 3806 soil samples from sugar and alcohol plant São Fernando in the year of 2012, 2013, 2014. For the data interpretation was used the fertility parameters proposed by Raij et al. (1997). The soil samples were separated by profundity, 0-25 cm e 25-50 cm, and evaluated the pH in CaCl2, the base saturation (%BS) and the level of Al3+, P, K+, Ca2+ e Mg2+ and S-SO42-. The results showed low levels of P, K+ and %BS and satisfactory levels of Ca2+, Ma2+ and S-SO42-, also except the S-SO42-, almost all the nutrients was found in lesser amounts in the layer of 25-50 cm, additionally this layer had the lowest level of pH and the highest level of Al3+.