| Journal: | Anais da Academia Brasileira de Ciencias |
| Database: | PERIÓDICA |
| System number: | 000436275 |
| ISSN: | 0001-3765 |
| Authors: | Parahyba, Roberto da B.V1 Araújo, Maria do Socorro B. de2 Almeida, Brivaldo G. de3 Rolim-Neto, Fernando C4 Sampaio, Everardo V.S.B5 Caldas, Anildo M4 |
| Institutions: | 1Empresa Brasileira de Pesquisa Agropecuaria, Solos, Recife, Pernambuco. Brasil 2Universidade Federal de Pernambuco, Departamento de Ciencias Geograficas, Recife, Pernambuco. Brasil 3Universidade Federal Rural de Pernambuco, Departamento de Agronomia, Recife, Pernambuco. Brasil 4Universidade Federal Rural de Pernambuco, Departamento de Tecnologia Rural, Recife, Pernambuco. Brasil 5Universidade Federal de Pernambuco, Departamento de Energia Nuclear, Recife, Pernambuco. Brasil |
| Year: | 2019 |
| Volumen: | 91 |
| Number: | 4 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Analítico, descriptivo |
| English abstract | One of the most serious problems in areas indicated for irrigation projects in the Brazilian Northeast region is the occurrence of sandy soils, known to have low moisture retention, but occurring in strategic locations in terms of water supply and geographical situation, and which can be used for agricultural purposes. The objective of this study was to evaluate the influence of particle size distribution and porosity on the water retention capacity of sandy soils in the semiarid area of the Northeast region. Soil bulk and particle densities, total porosity (macro, meso and microporosity), field capacity, permanent wilting point and soil-water retention curve were determined in samples of surface (A) and subsurface (C or Bw) horizons of ten sandy soil profiles. Particle size was determined subdividing the sand fraction into five classes. Higher amounts of the medium and fine sand fractions of the studied soils oriented their physical and hydric characteristics, being responsible for their great water retention. The arrangement of the fine silt, clay, fine sand and very fine sand particles may have provided a diversity of pore sizes and a good pore distribution, being responsible for the large proportion of micropores in the soils, allowing great water retention capacities |
| Disciplines: | Agrociencias |
| Keyword: | Suelos, Suelos arenosos, Microporosidad, Curva de retención de agua, Zonas semiáridas |
| Keyword: | Soils, Sandy soils, Water retention curve, Microporosity, Semiarid zones |
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