Logo do repositório
 

Response of Deep Soil Carbon Pools to Forest Management in a Highly Productive Andisol

Carregando...
Imagem de Miniatura

Orientador

Coorientador

Pós-graduação

Curso de graduação

Título da Revista

ISSN da Revista

Título de Volume

Editor

Soil Sci Soc Amer

Tipo

Artigo

Direito de acesso

Acesso restrito

Resumo

Soil contains more C than the atmosphere and plant biomass combined. Consequently, it is the most important long-term sink for C within terrestrial ecosystems. An understanding of the potential to induce C sequestration in soils through management is crucial in light of increasing anthropogenic CO2 emissions. Nevertheless, soil has historically been under-represented in C cycling research, especially regarding subsurface (>30 cm) layers and processes. Research on the effects of forest management practices on deep soil C has been lacking. To test the effects of biomass removal and vegetation control treatments on deep soil C, soils were sampled to a depth of 3 m at the Fall River Long-term Soil Productivity Site in western Washington State. Treatments were installed 15 yr previously in a complete randomized block design. No difference was found in total soil C among treatments, but there was significantly less (a = 0.10) C stored at the deepest interval measured (250-300 cm) in the plots with vegetation control (8.6 Mg C ha(-1)) than in those without (16.3 Mg C ha(-1)). These results suggest the stability of soil C pools at Fall River and indicate that more intensive management practices may not deplete C pools at this site, but imply that these deep soil pools may be more sensitive to change than shallow pools. Here, 58.2% of the soil C pool is located below 30 cm, which demonstrates that shallow sampling significantly underestimates soil C pools and highlights the importance of understanding processes that control deep soil C.

Descrição

Palavras-chave

Idioma

Inglês

Citação

Soil Science Society Of America Journal. Madison: Soil Sci Soc Amer, v. 81, n. 4, p. 970-978, 2017.

Itens relacionados

Unidades

Departamentos

Cursos de graduação

Programas de pós-graduação