BARBOSA, I. S.; http://lattes.cnpq.br/9706644320164877; BARBOSA, Ivson de Sousa.
Resumo:
Mining is a human activity that has been practiced since antiquity but causes environmental
changes in soil and vegetation. In Cariri state of Paraíba, the exploitation of bentonite is of great
socioeconomic importance and is characterized by the soil decapitation originating a large
volume of soil, with high CTC but with low content of organic matter and accumulated in the
area of plowing. The objective of this research was to evaluate the contribution of the organic
compound to the initial growth of native species cultivated in topsoil of mining. The research
was conducted in two stages: one in the nursery and the other in the field. In the nursery, doses
of organic compound (0.0 - 5 - 15 and 25% v / v) were applied to the topsoil by studying the
initial growth of the craibeira (Tabebuia aurea), jureminha (Desmanthus virgatus) e pau ferro
(Caesalpinia ferrea) by evaluating the height and diameter for 105 days. Then the seedlings
were planted in the field, quantifying the same variables for 120 days. In the nursery and in the
field the compound increased the height and diameter of the Caesalpinia ferrea, Tabebuia aurea
and Desmanthus virgatus, mainly at 105 and 120 days of sowing and planting, respectively.