Data/hora: 11/06/2024 03:19:11

Provedor de dados: | 90
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 &lt;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
Fonte: | info:eu-repo/semantics/openAccess