Perdas de solo em diferentes sistemas de uso avaliadas sob simulador de erosão
The soil losses by rainfall decrease soil fertility, increase sediment on the aquatic resources of the watershed, causing among others the reduced productivity of plant species, increased costs for the treatment of drinking water and reduction of aquatic life. The study aimed to evaluate soil losses...
| Autor principal: | Dalposso, David Marlon |
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| Formato: | Trabalho de Conclusão de Curso (Graduação) |
| Idioma: | Português |
| Publicado em: |
Universidade Tecnológica Federal do Paraná
2020
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| Assuntos: | |
| Acesso em linha: |
http://repositorio.utfpr.edu.br/jspui/handle/1/10793 |
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| Resumo: |
The soil losses by rainfall decrease soil fertility, increase sediment on the aquatic resources of the watershed, causing among others the reduced productivity of plant species, increased costs for the treatment of drinking water and reduction of aquatic life. The study aimed to evaluate soil losses in different land use systems under erosion simulator and its relationship with soil physical properties. The work was implemented in a completely randomized design in a factorial 2 x 5, two the presence and absence of coverage on the ground and five different uses, represented by the native forest, conventional tillage, no-till planted with pine forest and planted forest with eucalyptus. We evaluated the stability of aggregate water in a graduated vertical oscillation apparatus, as well as the influence of mulch on the generation of sediment erosion simulator and soil fertility through chemical analysis. It has been found that the presence of soil mulching reduces losses in the different uses. Conventional tillage showed the major losses of sediments, which are of 1879,2 ml L-1 of eroded soil, corresponding to 42.43% of the general average generation of sediment between treatments, followed by tillage with 926,6 ml L-1 (20.93%), forest planted with pine 675,3 ml L-1 (15.25%), forest planted with eucalyptus 523 ml L-1 (11.81%) and native forest with this being the lowest losses of 424,3 ml L-1 (9.58%). The largest losses of soil in conventional tillage should be the highest percentage of house holds in the smaller diameter classes, whereas in conservation tillage systems as forest planted with pine forest planted with eucalyptus and native forest there were fewer losses of soil for most percentage of these aggregates in larger diameter classes, indicating that on good land use systems, even upturned, enable lower soil losses by sediment. So it shows the great importance of proper soil management, adopting conservation practices in order to minimize both soil losses as their constituents nutrients, minerals, improving the capacity of cation exchange, phosphorus, organic matter as found in the present study. |
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