Estoque de carbono em sistemas agroflorestais no norte de Minas Gerais

Abstract

This research presents the estimated of the vegetable biomass and carbon stock (VB) above of the ground and the stock of organic carbon in the soil (SC) of three Agroforestry Systems (AFS1, AFS2 and AFS3) and two areas of adjacent native vegetation (NV1 and NV2), the Settlement Project (SP) American, in the city of Grão Mogol, north of Minas Gerais State. Since that the AFSs1 and 2 and the area of native vegetation are located under an Oxisol and the AFS3 and the area of native vegetation 2 is located under a Gleysoil. The VB was estimated by the indirect method using data from the inventory forest of plots of five 4 x 25m marked in the in the study areas. They were also examined the distribution of diameter classes and vertical stratification of individuals enrolled in the study areas. They were identified 796 individuals/ha with diameter measured at 1,30 m above the ground (DBH) to 5 cm. The carbon stock of the aerial part in Agroforestry Systems and in their respective areas of adjacent native vegetation is similar and also contributes to the reduction of the carbon from the atmosphere. To estimate the organic carbon in each plot installed in the study areas were collected and analyzed soil samples from depths of 0-10cm; 10-20cm and 20-40cm deep. In the group of Oxisol carbon stock in the AFS 1 and AFS 2 was similar and higher, respectively, than in the area of adjacent native vegetation (NV1). In bunch of the Gleysoil, the adjacent native vegetation area (NV2) showed higher carbon stock that AFS3, indicating that the use of the land before the implementation of Agroforestry Systems and management of the same interfered in the stock of carbon of the soil.