DISTRIBUIÇÃO VERTICAL DE CARBONO ORGÂNICO PARTICULADO EM NEOSSOLO SOB FLORESTA ALTA DE RESTINGA DE MATA ATLÂNTICA

Abstract

Among the Brazilian biomes, the Atlantic Forest is among one of the most affected by anthropic actions, its areas are deforested for the formation of pastures, in addition to the implantation of industrial activities, which contribute to an increase in the greenhouse gas contents, causing environmental, biodiversity and the hydrological cycle damage. The aim of this work was to quantify the levels of particulate carbon in depth in a typical Quartzarenic Neosol under Atlantic forest in the state of Paraíba. The area of the study belongs to the National Forest (FLONA) of Restinga of Cabedelo, with an area of 117 ha, created in 2004 and inserted in the region of the Paraíba River estuary, in Cabedelo, PB. The soils were collected in 60 points distributed in one Sampling mesh of 5 x 10 m, covering the entire forest area, at five depths, 0-10, 10-20, 20-30, 30-50 and 50-100 cm, and then were sent to the Laboratory of Soil Organic Matter CCA / UFPB to quantify the total organic carbon, carbon associated with sand fraction, carbon associated with silt + clay fraction, light fraction and organic matter. From the results of the data adjustments by the Kolmogorov-Smirnov test, we found a normal distribution of the data under analysis. There was a statistical difference at the 5% probability level for all analyzed variables (FL, C-AR, C-S, MOS-mufla and COS) in all the layers studied by the Tukey test. It contacted a reduction of FL, C-AR, C-SA, MOS-mufla and COS contents as the depth of soil layers increased. The superficial layer (0-10 cm) of the soil presented the highest carbon contents when compared to the other layers. The variables presented uniform distribution along the fragment.