| Registro completo |
| Provedor de dados: |
Rev. Bras. Ciênc. Solo
|
| País: |
Brazil
|
| Título: |
Interrill erodibility of different sandy soils increases along a catena in the Caiuá Sandstone Formation
|
| Autores: |
Thomaz,Edivaldo Lopes
Fidalski,Jonez
|
| Data: |
2020-01-01
|
| Ano: |
2020
|
| Palavras-chave: |
Hillslope
Soil-geomorphology
Hydropedology
Conventional tillage
Soil detachment
|
| Resumo: |
ABSTRACT Soil erosion in tropical areas is a major problem for sustainability in agriculture and soil stability. In the Northwest of Paraná, cassava crop is produced using a conventional tillage system along a catena consisting of different soil classes: Ferralsols (near the summit), Lixisols (mid-slope), and Arenosols (foot-slope). Therefore, differential soil erosion rate and soil degradation are expected along the catena. Here, we test the erodibility of the three sandy soil classes in a representative catena of the Caiuá Sandstone Formation. Disturbed soil samples were collected from a depth of 0.20 m. The soil erodibility test was performed in the laboratory through a multi-drop rainfall simulator. A rainfall intensity of 55 mm h-1 with an energy of 453 Jm2 h-1 was applied for the rainsplash tests (splash pan), whereas a rainfall intensity of 65 mm h-1 with an energy of 534 Jm2 h-1 was applied for the soil erodibility tests (using a small flume). The three soils showed differences in soil particles detached by raindrop on very fine sand class <0.15 mm as follows: Ferralsols 10 %, Arenosol 12 %, and Lixisol 15 %. The maximum soil erodibility increased gradually according to the soil position on the catena: Ferralsols (1.81 × 106 kg s m-4), Lixisols (2.83 × 106 kg s m-4), and Arenosols (3.41 × 106 kg s m-4). Finally, the position of the soil along the catena and total sand were the best in explaining soil interrill erodibility. Therefore, farmers and stakeholders should be cautious about applying a homogeneous tillage system from the summit to the foot-slope along a catena with different sandy soils.
|
| Tipo: |
Info:eu-repo/semantics/article
|
| Idioma: |
Inglês
|
| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832020000100501
|
| Editor: |
Sociedade Brasileira de Ciência do Solo
|
| Relação: |
10.36783/18069657rbcs20190064
|
| Formato: |
text/html
|
| Fonte: |
Revista Brasileira de Ciência do Solo v.44 2020
|
| Direitos: |
info:eu-repo/semantics/openAccess
|
