科研之友
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摘要
The Brazilian Cerrado vegetation comprises a mosaic of natural types, from open fields to savannas and forests. It is believed that the presence of different vegetation types in a region can be explained in part by the direct relationship with the attributes present in the same soil. The present study investigated the relationship between soil and vegetation in an area of Cerrado biome with influence of Urucuia Group. To do so, we conducted a survey of soils and vegetation in 1: 50,000 scale in an area of approximately 32,000 hectares located in the tri-border region of Minas Gerais, Goias and Bahia states, with the sandstone substrate of Urucuia Group. The analytical results of soil classes were related to the present data of the physiognomies through common statistical analysis and through the determination of the main components. The soils of the region reflected well the source material, with high percentages of sand, with a predominance of Oxisol Hapludox and Oxisol dystrophic, present in over 35% of the entire study area. The most common vegetation type was Cerrado sense, restrict and typical. The principal component analysis indicated that the fine sand, clay and aluminum accounted for 93.7% of the variability of the relationship between soils and vegetation type
- 出版日期2015-6
