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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
10/11/1998 |
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Data da última atualização: |
30/03/2017 |
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Autoria: |
PENNOCK, D. J.; KESSEL, C. van. |
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Título: |
Clear-cut forest harvest impacts on soil quality indicators in the mixedwood forest of Saskatchewan, Canada. |
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Ano de publicação: |
1997 |
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Fonte/Imprenta: |
Geoderma, v.75, n.1/2, p.13-32, 1997. |
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Idioma: |
Inglês |
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Conteúdo: |
The concept of soil quality is relevant to a range of human-indiced disturbances on soil; our objective was to examine the impact of clear-cutting on soil quality conditions in six Mixedwood (Populus tremuloides-Picea glauca) stands in Central Saskatchewan, Canada. Soil quality conditions at two short-term (1 to 5 years) and four medium-term (6 to 20 years) clear-cut sites were compared to eight mature Mixedwood sites. All sites had similar, albeit complex, distribution of soil and parent sediments. No major differences were observed between the short-term clear-cut sites and the mature Mixedwood sites. At the medium-term sites, substantial losses of soil organic carbon (24%), soil nitrogen (27%) and LFH thickness (28%) were observed, along with decreases in the soil surface (0 to 15 cm layer) of exchangeable calcium and magnesium (30%), soluble organic P (15%) and cation exchange capacity and base saturation (20%). The losses were much lower in the 15 to 45 cm layer of the soil. Overall, the levels of these soil components observed at the clear-cut sites were within the natural or undisturbed range as assessed at the mature Mixedwood sites; however the amounts of soil organic carbon and nitrogen at the clear-cut sites were lower than the natural range. Althhought the absolute levels of loss of soil organic carbon and nitrogen were much lower than in typical agricultural landscapes, the long-term ecological significance of the losses in these forested landscapes remains a concern. MenosThe concept of soil quality is relevant to a range of human-indiced disturbances on soil; our objective was to examine the impact of clear-cutting on soil quality conditions in six Mixedwood (Populus tremuloides-Picea glauca) stands in Central Saskatchewan, Canada. Soil quality conditions at two short-term (1 to 5 years) and four medium-term (6 to 20 years) clear-cut sites were compared to eight mature Mixedwood sites. All sites had similar, albeit complex, distribution of soil and parent sediments. No major differences were observed between the short-term clear-cut sites and the mature Mixedwood sites. At the medium-term sites, substantial losses of soil organic carbon (24%), soil nitrogen (27%) and LFH thickness (28%) were observed, along with decreases in the soil surface (0 to 15 cm layer) of exchangeable calcium and magnesium (30%), soluble organic P (15%) and cation exchange capacity and base saturation (20%). The losses were much lower in the 15 to 45 cm layer of the soil. Overall, the levels of these soil components observed at the clear-cut sites were within the natural or undisturbed range as assessed at the mature Mixedwood sites; however the amounts of soil organic carbon and nitrogen at the clear-cut sites were lower than the natural range. Althhought the absolute levels of loss of soil organic carbon and nitrogen were much lower than in typical agricultural landscapes, the long-term ecological significance of the losses in these forested landscapes remains a co... Mostrar Tudo |
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Palavras-Chave: |
Degradacao do solo; Forest; Impact; Impacto; Qualidade do solo. |
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Thesagro: |
Floresta. |
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Thesaurus Nal: |
Canada; soil degradation; soil quality. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02155naa a2200241 a 4500
001 1793336
005 2017-03-30
008 1997 bl --- 0-- u #d
100 1 $aPENNOCK, D. J.
245 $aClear-cut forest harvest impacts on soil quality indicators in the mixedwood forest of Saskatchewan, Canada.
260 $c1997
520 $aThe concept of soil quality is relevant to a range of human-indiced disturbances on soil; our objective was to examine the impact of clear-cutting on soil quality conditions in six Mixedwood (Populus tremuloides-Picea glauca) stands in Central Saskatchewan, Canada. Soil quality conditions at two short-term (1 to 5 years) and four medium-term (6 to 20 years) clear-cut sites were compared to eight mature Mixedwood sites. All sites had similar, albeit complex, distribution of soil and parent sediments. No major differences were observed between the short-term clear-cut sites and the mature Mixedwood sites. At the medium-term sites, substantial losses of soil organic carbon (24%), soil nitrogen (27%) and LFH thickness (28%) were observed, along with decreases in the soil surface (0 to 15 cm layer) of exchangeable calcium and magnesium (30%), soluble organic P (15%) and cation exchange capacity and base saturation (20%). The losses were much lower in the 15 to 45 cm layer of the soil. Overall, the levels of these soil components observed at the clear-cut sites were within the natural or undisturbed range as assessed at the mature Mixedwood sites; however the amounts of soil organic carbon and nitrogen at the clear-cut sites were lower than the natural range. Althhought the absolute levels of loss of soil organic carbon and nitrogen were much lower than in typical agricultural landscapes, the long-term ecological significance of the losses in these forested landscapes remains a concern.
650 $aCanada
650 $asoil degradation
650 $asoil quality
650 $aFloresta
653 $aDegradacao do solo
653 $aForest
653 $aImpact
653 $aImpacto
653 $aQualidade do solo
700 1 $aKESSEL, C. van
773 $tGeoderma$gv.75, n.1/2, p.13-32, 1997.
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