Data/hora: 05/06/2024 17:10:11

Provedor de dados: | 90
País: | Brazil
Título: | Influence of litter layer removal on the soil thermal regime of a pine forest in a mediterranean climate
Autores: | Andrade,José Alexandre Varanda; Abreu,Francisco Manuel Gonçalves de; Madeira,Manuel Armando Valeriano.
Data: | 2010-10-01
Ano: | 2010
Palavras-chave: | Soil temperature; Fourier series; Damping depth.
Resumo: | The removal of the litter layer in Portuguese pine forests would reduce fire hazard, but on the other hand this practice would influence the thermal regime of the soil, hence affecting soil biological activity, litter decomposition and nutrient dynamics. Temperature profiles of a sandy soil (Haplic Podzol) under a pine forest were measured with thermocouples at depths to 16 cm, with and without litter layer. The litter layer acted as a thermal insulator, reducing the amplitude of the periodic temperature variation in the mineral soil underneath and increasing damping depths, particularly at low soil water contents. At the mineral soil surface the reduction of amplitudes was about 2.5 ºC in the annual cycle and 5 to 6.7 ºC in the daily cycle, depending on the soil water content. When soil was both cold and wet, mean daily soil temperatures were higher (about 1 - 1.5 ºC) under the litter layer. Improved soil thermal conditions under the litter layer recommend its retention as a forest management practice to follow in general.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832010000500001
Editor: | Sociedade Brasileira de Ciência do Solo
Relação: | 10.1590/S0100-06832010000500001
Formato: | text/html
Fonte: | Revista Brasileira de Ciência do Solo  v.34 n.5 2010
Fonte: | info:eu-repo/semantics/openAccess