Infiltração de água no solo condicionadas pelo uso de plantas de cobertura

Detalhes bibliográficos
Ano de defesa: 2017
Autor(a) principal: Mallmann, Micael Stolben
Orientador(a): Não Informado pela instituição
Banca de defesa: Não Informado pela instituição
Tipo de documento: Dissertação
Tipo de acesso: Acesso aberto
Idioma: por
Instituição de defesa: Universidade Federal de Santa Maria
Brasil
Agronomia
UFSM
Programa de Pós-Graduação em Ciência do Solo
Centro de Ciências Rurais
Programa de Pós-Graduação: Não Informado pela instituição
Departamento: Não Informado pela instituição
País: Não Informado pela instituição
Palavras-chave em Português:
Link de acesso: http://repositorio.ufsm.br/handle/1/13309
Resumo: The inclusion of cover crops in agricultural production systems has received attention for the ability to improve the multifunctionality of the soil. In order to improve soil structure and soil physical-hydric properties, especially soil water infiltration, the objective of this study was: (a) to evaluate the effect of different species of winter cover crops on soil physical properties and (b) to verify the relationship between punctual methods for the evaluation of water infiltration in the soil and the infiltration of water with natural rainfall on plot scale. For the first study the systems studied were: oat and vetch (AE) consortium, oat and turnip (AN), spontaneous vegetation (VE) and bare soil (SD). Soil samples with undisturbed structure were collected in the layers of 0 - 0,05; 0,05 - 0,1; 0,1 - 0,2 and 0,2 - 0,3 m to measure bulk density (DS), total porosity (Pt), macroporosity (Mac), microporosity (Mic), saturated soil hydraulic conductivity (Ksat) and permeability to air (Ka). Soil aggregation was also evaluated in the layers of 0 - 0.05 and 0.5 - 0.1 m. Soil water infiltration was determined by the concentric double ring method. For the second study, three treatments were used in the first study to determine the rate of stable infiltration of soil water (TIE) by the Cornell infiltrometer, double ring infiltrometer and infiltration in natural rainfall events. The results indicate that after the cultivation of winter cover crops, there are no changes in the physical properties evaluated, but there is evidence of improved water infiltration in the soil and the continuity and pore diameter in the treatments with cover crops. The TIE determined by the Cornell infiltrometer and double ring infiltrometer method is overestimated from 1.8 to 2.2 times that of natural rainfall.