| Journal: | Acta scientiarum. Agronomy |
| Database: | PERIÓDICA |
| System number: | 000460139 |
| ISSN: | 1679-9275 |
| Authors: | Silva, Ygor Jacques Agra Bezerra da1 Nascimento, Clístenes Williams Araújo do1 Biondi, Caroline Miranda1 Straaten, Peter van2 Souza Júnior, Valdomiro Severino de1 Ferreira, Tiago Osório3 |
| Institutions: | 1Universidade Federal Rural de Pernambuco, Departamento de Agronomia, Recife, Pernambuco. Brasil 2University of Guelph, Guelph, Ontario. Canadá 3Universidade de São Paulo, Escola Superior de Agricultura "Luiz de Queiroz”, São Paulo, São Paulo. Brasil |
| Year: | 2019 |
| Volumen: | 41 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Analítico, descriptivo |
| English abstract | We studied the mineralogical properties and chemical composition of different granites using energy dispersive X-ray spectroscopy coupled with scanning electron microscopy to understand the relationship between granite signatures and soil characteristics, including weathering patterns and soil fertility status. The discriminant analysis (DA) was based on soil physical and chemical properties and was used to differentiate soils developed from I- and S-type granites across contrasting climatic conditions in northeast Brazil. The DA identified the highest values of organic carbon, clay and plant nutrients as key variables to recognize soil profiles derived from I-type granites. In contrast, the greater sand contents and Al saturation distinguished soils developed from S-type granites. These results were related to the mineralogical characteristics of each granite type, such as a high percentage of silica-bearing minerals in the S-type granites. The highest concentrations of K, Ca, Mg, and P in I-type granites were found in feldspars, amphiboles, and apatite. These elements account for the majority of nutrients derived in their soil profiles. However, it seems that the harsh conditions of the humid tropical environment equalized the effect of the rocks on weathering rates-the difference in chemical index of alteration is more extreme in the dry region |
| Disciplines: | Agrociencias, Biología |
| Keyword: | Fitotecnia, Genética, Análisis estadístico |
| Keyword: | Soil science, Soil genesis, Soil fertility, Chemical index of alteration, Northeastern Brazil |
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