Diagnóstico e desenvolvimento inicial de mamoneira em solos de áreas degradadas.

The soil degradation in semiarid occurs also by the deforestation of Caatinga and the removal of topsoil, whose fate is the industry of ceramic or pottery. This study aimed to evaluate the growth of mamoneira in degraded soils. Treatments consisted of degraded soils: 1-degraded subsoil, subsoil-2 degraded and deforested area, four doses of phosphorus (0, 100, 200, 300 mg kg-1 P), with three replications. Absolute witnesses, without phosphorus corresponded to salinized soil uncorrected, non-degraded soil-1, 2-non-degraded soil and soil of the caatinga not deforested. The degraded soil by salts, subsoil-2, received correction with gypsum, was incubated and washed. The results showed that the analysis of degraded subsoil revealed high salinity and low phosphorus concentration and organic matter, degraded subsoil saline demands correction with gypsum to make the cultivation of mamona in deforested and degraded caatinga subsoils possible. The phosphorus levels did not promote significant development in seedlings of mamona. [ABSTRACT FROM AUTHOR]