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Registro Completo |
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
02/04/2002 |
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Data da última atualização: |
04/10/2024 |
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Autoria: |
MADEIRA, M. V. A.; MELO, M. G.; ALEXANDRE, C. A.; STEEN, E. |
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Título: |
Effects of deep ploughing and superficial disc harrowing on physical and chemical soil properties and biomass in a new plantation of Eucalyptus globulus. |
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Ano de publicação: |
1989 |
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Fonte/Imprenta: |
Soil and Tillage Research, v. 14, n. 1, p. 163-176, 1989. |
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Idioma: |
Inglês |
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Conteúdo: |
The effects of minimal (surface disc harrowing) and intensive (deep ploughing) site preparation techniques in a Eucalyptus globulus plantation on various soil properties as well as on biomass production were compared. The results presented cover the first 30 months after planting. Disc harrowing caused a significant decrease in bulk density to 30-cm depth, a decrease in soil compaction to 10-cm depth and an increase in porosity in the 0 to 10-cm layer. Deep ploughing induced a decrease in the bulk density between 10- and 80-cm depth, but had no effect on porosity or the levels of soil compaction. Infiltration was greater with disc harrowing. In both treatments the chemical properties of the soil were only affected within the top 20 cm. Significant decreases in organic carbon, pH, exchangeable Ca, sum of bases and cation exchange capacity occurred in both treatments. Decreases in all variables except pH were significantly higher in deep ploughed than in disc-harrowed plots. Biomass production and partitioning, measured 18 and 30 months after planting, were not affected by the treatments. However, roots were concentrated in the 0 to 20-cm layer in the disc-harrowed plots and in the 20 to 75-cm layer in the deep-ploughed plots. The results are discussed with reference to current techniques for managing E. globulus plantations in Portugal. |
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Palavras-Chave: |
Broadleaves; Deep ploughing; Disc harrows; Ion exchange capacity; Mechanical methods; Ploughing. |
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Thesaurus Nal: |
biomass; calcium; carbon; site preparation; soil biology; soil chemistry; soil compaction; soil density; soil pH; soil physics; soil properties; tillage. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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Marc: |
LEADER 02426naa a2200373 a 4500
001 1278610
005 2024-10-04
008 1989 bl uuuu u00u1 u #d
100 1 $aMADEIRA, M. V. A.
245 $aEffects of deep ploughing and superficial disc harrowing on physical and chemical soil properties and biomass in a new plantation of Eucalyptus globulus.$h[electronic resource]
260 $c1989
520 $aThe effects of minimal (surface disc harrowing) and intensive (deep ploughing) site preparation techniques in a Eucalyptus globulus plantation on various soil properties as well as on biomass production were compared. The results presented cover the first 30 months after planting. Disc harrowing caused a significant decrease in bulk density to 30-cm depth, a decrease in soil compaction to 10-cm depth and an increase in porosity in the 0 to 10-cm layer. Deep ploughing induced a decrease in the bulk density between 10- and 80-cm depth, but had no effect on porosity or the levels of soil compaction. Infiltration was greater with disc harrowing. In both treatments the chemical properties of the soil were only affected within the top 20 cm. Significant decreases in organic carbon, pH, exchangeable Ca, sum of bases and cation exchange capacity occurred in both treatments. Decreases in all variables except pH were significantly higher in deep ploughed than in disc-harrowed plots. Biomass production and partitioning, measured 18 and 30 months after planting, were not affected by the treatments. However, roots were concentrated in the 0 to 20-cm layer in the disc-harrowed plots and in the 20 to 75-cm layer in the deep-ploughed plots. The results are discussed with reference to current techniques for managing E. globulus plantations in Portugal.
650 $abiomass
650 $acalcium
650 $acarbon
650 $asite preparation
650 $asoil biology
650 $asoil chemistry
650 $asoil compaction
650 $asoil density
650 $asoil pH
650 $asoil physics
650 $asoil properties
650 $atillage
653 $aBroadleaves
653 $aDeep ploughing
653 $aDisc harrows
653 $aIon exchange capacity
653 $aMechanical methods
653 $aPloughing
700 1 $aMELO, M. G.
700 1 $aALEXANDRE, C. A.
700 1 $aSTEEN, E.
773 $tSoil and Tillage Research$gv. 14, n. 1, p. 163-176, 1989.
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Registro original: |
Embrapa Florestas (CNPF) |
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