Estudo da biodiversidade do distrito de Chokwé

Abstract

The present work was carried out in March 2002 in the District of Chókwè, with the aim of contributing to the knowledge of plant species in general and specifically relating them to the characteristics of the soil units existing in this area. District. To make the inventory, the Daubenmire method was used, following linear transects where, every 500 meters, an area of ​​900 m2 (30mx300m) was delimited, where the absolute frequency and percentage of vegetation cover were studied. At the same time, in the center of each 30mx30m area, a soil sample was extracted for further analysis of pH, organic matter, soil texture and electrical conductivity, in order to know the ecological preferences of each species. Ten inventories were carried out (10 transects) for each soil unit, which resulted in the inventory of 105 plant species distributed by 35 families, with the Fabaceae being the most predominant, with 20.8%, followed by the Poaceae families (16.0%) , Asteraceae (6.6%) and Cyperaceae (5.7%). The FL soil unit had the greatest diversity of species, with 39, followed by the E2 (31) and Ei and Di units, both with 27 species. The species with the highest relative frequency were Sorghum versicolor and Panicum maximum, with 48.9% and 46.9%, respectively. Sorghum versicolr and Panicum maximum had the highest percentage of average coverage (75-100%). Finally, it is recommended that future work of this nature be done twice a year, once in the hot and rainy season and the other in the cold and dry season, as the time of year influences biotic factors and these to the ecosystem, which may, somehow affect the search results.