Estimativas de stock de carbono nas florestas de miombo em Gondola

Abstract

This work was carried out in the District of Gondola, and aimed to estimate the potential for carbon sequestration in the miombo woodland. For this purpose, four classes of land use and cover were selected, namely dense forest, open forest, other woody formations and agricultural areas, where temporary plots of 20x50m were established, with 8, 6 being allocated to each class of use. 3, 7 installments, respectively. In the study area, the DBH of 31 trees was measured, and then felled, then the diameters of the base and top, the total and commercial height and finally sectioned and weighed were measured. In the plots, DAP data and species names were collected, and herbaceous, litter and soil samples were taken. The results regarding the average biomass stocks obtained were: 130.27 ton / ha (dense forest), 116.24 ton / ha (open forest), 48.77 ton / ha (other woody formations) and 4.07 ton / ha (agriculture areas) and the carbon stock of 158.54, 100.36, 133.05 and 62.29 ton / ha, respectively. The soil component is the one that most contributed to carbon on average (about 67.05%). In a total area of ​​548843.31 ha, it was estimated about 54736844.15 ton of carbon. The analysis of variance between the averages of carbon levels, indicated significant differences between the class composed of areas of agriculture and classes of dense forest and open forest. Analyzing the correlations and regressions, it was found that there is a good relationship between biomass and trunk volume, biomass and diameter and between biomass and the total height of the trees, where the strongest correlation was found between biomass and the diameter.