Levantamento e caracterização das manchas de Androstackys johnsonii - Cimbirre em Goba na província de Maputo

Abstract

The main objective of the work is to survey and characterize the patches of Androstachys johsonii (Cimbirre), to facilitate the elaboration of the community management plan in Goba. For this purpose, it was necessary to carry out a participatory location, dendrometric survey, characterization and identification of the main rules of traditional management and the uses of the species found in the Androstachys jon=hnsonii (Cimbirre) patches of Goba, in cluster-type sampling plots consisting of four samples of 0.1 ha where the dendrometric parameters were measured. Information on uses was obtained through interviews with people asked to explore the trees or make machanbas around the patches. The results of the work show that in Goba there are 12 patches of Cimbirre occupying 420.5ha, being 8 patches with adult population and 4 with young population. During the dendrometric survey, 24 species with a dap greater than 5 cm were identified, 23 species with a dap less than 5 cm in the adult population patches and 28 species with a dap less than 5 cm in the young population patches. In all stands, the species Cimbirre was the one with the highest abundance, dominance and frequency. The dominant height in the Cimbirre patches was 14m. The strata have three strata, with the lower stratum (EI)<43m, 43m<medium (EM)<9.3m and upper stratum (ES)>9.3m and it was found that the species Cimbirre appears in all strata, which guarantees a sociological position. In the Cimbirre stand with mature trees, 409 trees were found per hactar with averages of 13.71 cm, 9.49m and 65.84m3/ha of Dap, Ht and volume respectively. On the other hand, in regeneration the above parameters will vary between 1228-2002, 1.9-2.09cm, 2.66-2.7m and 1.72-1.75m3/ha of number of trees per hactare, Dap, Ht and Volume per hactare respectively. The inverted J-type curve obtained that the second diameter curve has greater numbers of trees than the first diameter class. Incorrect use of Cimbirre and Xilati species for charcoal production was verified. In view of the incorrect use of the Cimbirre and Xilati species, it is recommended that they be prohibited to cut them for the production of charcoal inside the Cimbirre manchas.