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| 17. |  | PIRON, D.; PÉRÈS, G.; VANDENKOORHUYSE, P.; MONARD, C.; HALLAIRE, V.; MENASSERI, S.; CLUZEAU, D. Changes in soil bacteria community according to earthworm biostructures. A field approach in agricultural soils. In: INTERNATIONAL COLLOQUIUM ON SOIL ZOOLOGY, 15; INTERNATIONAL COLLOQUIUM ON APTERYGOTA, 12., 2008, Curitiba. Biodiversity, conservation and sustainabele management of soil animal: abstracts. Colombo: Embrapa Florestas. Editors: George Gardner Brown; Klaus Dieter Sautter; Renato Marques; Amarildo Pasini. 1 CD-ROM.| Biblioteca(s): Embrapa Florestas. |
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| 18. | | PIRON, D.; PÉRÈS, G.; BELLIDO, A.; HALLAIRE, V.; BOTTINELLI, N.; MENASSEREI, S.; CLUZEAU, D. Soil tillage practices and the spatial organisation of earthworm biostructures. In: INTERNATIONAL COLLOQUIUM ON SOIL ZOOLOGY, 15; INTERNATIONAL COLLOQUIUM ON APTERYGOTA, 12., 2008, Curitiba. Biodiversity, conservation and sustainabele management of soil animal: abstracts. Colombo: Embrapa Florestas. Editors: George Gardner Brown; Klaus Dieter Sautter; Renato Marques; Amarildo Pasini. 1 CD-ROM.| Biblioteca(s): Embrapa Florestas. |
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| Registros recuperados : 44 | |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Florestas. Para informações adicionais entre em contato com cnpf.biblioteca@embrapa.br. |
Registro Completo
|
Biblioteca(s): |
Embrapa Florestas. |
|
Data corrente: |
25/09/2008 |
|
Data da última atualização: |
25/09/2008 |
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Autoria: |
PIRON, D.; PÉRÈS, G.; VANDENKOORHUYSE, P.; MONARD, C.; HALLAIRE, V.; MENASSERI, S.; CLUZEAU, D. |
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Título: |
Changes in soil bacteria community according to earthworm biostructures. A field approach in agricultural soils. |
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Ano de publicação: |
2008 |
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Fonte/Imprenta: |
In: INTERNATIONAL COLLOQUIUM ON SOIL ZOOLOGY, 15; INTERNATIONAL COLLOQUIUM ON APTERYGOTA, 12., 2008, Curitiba. Biodiversity, conservation and sustainabele management of soil animal: abstracts. Colombo: Embrapa Florestas. Editors: George Gardner Brown; Klaus Dieter Sautter; Renato Marques; Amarildo Pasini. 1 CD-ROM. |
|
Idioma: |
Inglês |
|
Conteúdo: |
It is widely accepted that earthworm activities participate greatly to soil processes by the
bioturbation of large volumes of soil. In particular, their disturbances affect primarily the soil
bacteria communities by their gut transit. However, while earthworm cast biostructures deviate
from surrounding soil in term of morphology and availability of organic matter compound, little is
know about the persistence of a functional discrimination of microbial biota within soil
biostructures. In this work, we have considered that the bacterial communities could vary
according to the aged of cast deposition, to the location of cast and also to OM nature initially
ingested by earthworm.
Based on the classification of soil structures observable on soil profile (Piron et al, 2008), we
sampled soil cores corresponding to physicogenic soil structures (e.g. S- Surrounding soil and
Ag- granular plough structure) and to biogenic structures (e.g. B3g and B3i that represent
respectively some recent granular and welded packing of cast deposition). So, soil material
was collected at different depths and under contrasted soil management in the experimental
plot of Kerguéhennec (France) that compared impact of different fertilisations (mineral fertilisation
vs poultry manure) combined to different tillage practices.
On each soil cores, Ctot and Ntot were measured. Moreover, we considered soil bacterial
community by the fingerprinting of 16S rRNA gene fragment assessed by terminal restriction
fragment length polymorphism (T-RFLP).
First results demonstrated that the manure input enhanced the Ctot rate in the first centimetres
for both physicogenic and biogenic soil structures. However, differences clearly appeared with
the depth: biogenic structures significantly concentrated Ctot below 20 cm.
The variability of bacterial communities will be discussed in regard to this spatial variability of
Ctot and Ntot content, and the different fertilisation treatments. MenosIt is widely accepted that earthworm activities participate greatly to soil processes by the
bioturbation of large volumes of soil. In particular, their disturbances affect primarily the soil
bacteria communities by their gut transit. However, while earthworm cast biostructures deviate
from surrounding soil in term of morphology and availability of organic matter compound, little is
know about the persistence of a functional discrimination of microbial biota within soil
biostructures. In this work, we have considered that the bacterial communities could vary
according to the aged of cast deposition, to the location of cast and also to OM nature initially
ingested by earthworm.
Based on the classification of soil structures observable on soil profile (Piron et al, 2008), we
sampled soil cores corresponding to physicogenic soil structures (e.g. S- Surrounding soil and
Ag- granular plough structure) and to biogenic structures (e.g. B3g and B3i that represent
respectively some recent granular and welded packing of cast deposition). So, soil material
was collected at different depths and under contrasted soil management in the experimental
plot of Kerguéhennec (France) that compared impact of different fertilisations (mineral fertilisation
vs poultry manure) combined to different tillage practices.
On each soil cores, Ctot and Ntot were measured. Moreover, we considered soil bacterial
community by the fingerprinting of 16S rRNA gene fragment assessed by terminal restriction
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LEADER 02794naa a2200193 a 4500
001 1314923
005 2008-09-25
008 2008 bl uuuu u00u1 u #d
100 1 $aPIRON, D.
245 $aChanges in soil bacteria community according to earthworm biostructures. A field approach in agricultural soils.
260 $c2008
520 $aIt is widely accepted that earthworm activities participate greatly to soil processes by the bioturbation of large volumes of soil. In particular, their disturbances affect primarily the soil bacteria communities by their gut transit. However, while earthworm cast biostructures deviate from surrounding soil in term of morphology and availability of organic matter compound, little is know about the persistence of a functional discrimination of microbial biota within soil biostructures. In this work, we have considered that the bacterial communities could vary according to the aged of cast deposition, to the location of cast and also to OM nature initially ingested by earthworm. Based on the classification of soil structures observable on soil profile (Piron et al, 2008), we sampled soil cores corresponding to physicogenic soil structures (e.g. S- Surrounding soil and Ag- granular plough structure) and to biogenic structures (e.g. B3g and B3i that represent respectively some recent granular and welded packing of cast deposition). So, soil material was collected at different depths and under contrasted soil management in the experimental plot of Kerguéhennec (France) that compared impact of different fertilisations (mineral fertilisation vs poultry manure) combined to different tillage practices. On each soil cores, Ctot and Ntot were measured. Moreover, we considered soil bacterial community by the fingerprinting of 16S rRNA gene fragment assessed by terminal restriction fragment length polymorphism (T-RFLP). First results demonstrated that the manure input enhanced the Ctot rate in the first centimetres for both physicogenic and biogenic soil structures. However, differences clearly appeared with the depth: biogenic structures significantly concentrated Ctot below 20 cm. The variability of bacterial communities will be discussed in regard to this spatial variability of Ctot and Ntot content, and the different fertilisation treatments.
700 1 $aPÉRÈS, G.
700 1 $aVANDENKOORHUYSE, P.
700 1 $aMONARD, C.
700 1 $aHALLAIRE, V.
700 1 $aMENASSERI, S.
700 1 $aCLUZEAU, D.
773 $tIn: INTERNATIONAL COLLOQUIUM ON SOIL ZOOLOGY, 15; INTERNATIONAL COLLOQUIUM ON APTERYGOTA, 12., 2008, Curitiba. Biodiversity, conservation and sustainabele management of soil animal: abstracts. Colombo: Embrapa Florestas. Editors: George Gardner Brown; Klaus Dieter Sautter; Renato Marques; Amarildo Pasini. 1 CD-ROM.
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