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Registro Completo |
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
18/09/2008 |
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Data da última atualização: |
18/09/2008 |
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Autoria: |
PIRON, D.; PÉRÈS, G.; BELLIDO, A.; HALLAIRE, V.; BOTTINELLI, N.; MENASSEREI, S.; CLUZEAU, D. |
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Título: |
Soil tillage practices and the spatial organisation of earthworm biostructures. |
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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. |
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Idioma: |
Inglês |
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Conteúdo: |
Earthworm biostructures are widely accepted for their distinctiveness in term of soil structure,
organic matter availability or biological activities. However, while the determinism of earthworm
activities has been investigated since a long time, only few studies have reported data on the
spatial distribution of earthworm biostructures according to agricultural practices.
Therefore, many soil profiles corresponding to conventional tillage (CT) and no-tillage treatment
(NT) were thinly sketched according to the typology of soil morphologic features (physicogenic
and biogenic facies). Then, GIS tool were used (i) to quantify the areas of biostructures according
to the depth, (ii) to qualify the size and the shape of the facies (iii) and to detect their preferential
orientation.
This study showed that the area of biogenic facies clearly differed between 0 and 25cm, with the
significant highest value for NT treatment (25 to 35%) vs 10% for CT treatment. On the other
hand, the percent of biogenic facies that decreased gradually below 25cm did not differ
significantly between the agricultural treatments.
Facies of bioturbation was composed by a major part of cast aggregates assembling (B3),
dominated by welded casts (B3i), while the facies B1 (burrows) never exceeded 1% of the soil
profile.
The size of B3 facies could reach 80cm², but most of them (80%) were ranged between 4 and
20cm². In addition, the shape of the facies B3 appeared frequently circular, even if a contortioned
shape characterized often the welded casts assembling (B3i). In No-Tillage treatment, the impact
on earthworm activities of past ploughing was noticed by the oblique orientation for many facies
B3i between 10 and 25cm.
Our study showed that earthworm activities under the constraint of soil agricultural practices are
an important process of soil structure MenosEarthworm biostructures are widely accepted for their distinctiveness in term of soil structure,
organic matter availability or biological activities. However, while the determinism of earthworm
activities has been investigated since a long time, only few studies have reported data on the
spatial distribution of earthworm biostructures according to agricultural practices.
Therefore, many soil profiles corresponding to conventional tillage (CT) and no-tillage treatment
(NT) were thinly sketched according to the typology of soil morphologic features (physicogenic
and biogenic facies). Then, GIS tool were used (i) to quantify the areas of biostructures according
to the depth, (ii) to qualify the size and the shape of the facies (iii) and to detect their preferential
orientation.
This study showed that the area of biogenic facies clearly differed between 0 and 25cm, with the
significant highest value for NT treatment (25 to 35%) vs 10% for CT treatment. On the other
hand, the percent of biogenic facies that decreased gradually below 25cm did not differ
significantly between the agricultural treatments.
Facies of bioturbation was composed by a major part of cast aggregates assembling (B3),
dominated by welded casts (B3i), while the facies B1 (burrows) never exceeded 1% of the soil
profile.
The size of B3 facies could reach 80cm², but most of them (80%) were ranged between 4 and
20cm². In addition, the shape of the facies B3 appeared frequently circular, even if a contortioned
sha... Mostrar Tudo |
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Categoria do assunto: |
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LEADER 02644naa a2200193 a 4500
001 1314870
005 2008-09-18
008 2008 bl uuuu u00u1 u #d
100 1 $aPIRON, D.
245 $aSoil tillage practices and the spatial organisation of earthworm biostructures.
260 $c2008
520 $aEarthworm biostructures are widely accepted for their distinctiveness in term of soil structure, organic matter availability or biological activities. However, while the determinism of earthworm activities has been investigated since a long time, only few studies have reported data on the spatial distribution of earthworm biostructures according to agricultural practices. Therefore, many soil profiles corresponding to conventional tillage (CT) and no-tillage treatment (NT) were thinly sketched according to the typology of soil morphologic features (physicogenic and biogenic facies). Then, GIS tool were used (i) to quantify the areas of biostructures according to the depth, (ii) to qualify the size and the shape of the facies (iii) and to detect their preferential orientation. This study showed that the area of biogenic facies clearly differed between 0 and 25cm, with the significant highest value for NT treatment (25 to 35%) vs 10% for CT treatment. On the other hand, the percent of biogenic facies that decreased gradually below 25cm did not differ significantly between the agricultural treatments. Facies of bioturbation was composed by a major part of cast aggregates assembling (B3), dominated by welded casts (B3i), while the facies B1 (burrows) never exceeded 1% of the soil profile. The size of B3 facies could reach 80cm², but most of them (80%) were ranged between 4 and 20cm². In addition, the shape of the facies B3 appeared frequently circular, even if a contortioned shape characterized often the welded casts assembling (B3i). In No-Tillage treatment, the impact on earthworm activities of past ploughing was noticed by the oblique orientation for many facies B3i between 10 and 25cm. Our study showed that earthworm activities under the constraint of soil agricultural practices are an important process of soil structure
700 1 $aPÉRÈS, G.
700 1 $aBELLIDO, A.
700 1 $aHALLAIRE, V.
700 1 $aBOTTINELLI, N.
700 1 $aMENASSEREI, 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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Registro original: |
Embrapa Florestas (CNPF) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Mandioca e Fruticultura. Para informações adicionais entre em contato com cnpmf.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
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Data corrente: |
30/10/2009 |
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Data da última atualização: |
29/01/2010 |
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Tipo da produção científica: |
Artigo em Anais de Congresso / Nota Técnica |
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Autoria: |
BRASILEIRO, B. P.; LEDO, C. A. da S.; SANTOS, P. de A.; AMARAL, C. L. F. |
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Afiliação: |
Bruno Portela Brasileiro, UFRB; Carlos Alberto da Silva Ledo, CNPMF; Pedro de Almeida Santos, UFRB; Cláudio Lúcio Fernandes Amaral, UESB. |
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Título: |
Transformação de dados e suas implicações na estimativa de parâmetros genéticos em alfavacão. |
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Ano de publicação: |
2009 |
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Fonte/Imprenta: |
In: CONGRESSO BRASILEIRO DE MELHORAMENTO DE PLANTAS, 5., 2009, Guarapari. O melhoramento e os novos cenários da agricultura: anais. Vitória: Incaper, 2009. 1 CD-ROM. |
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Idioma: |
Português |
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Notas: |
pdf 2388
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Conteúdo: |
Métodos de estimativa dos componentes de variância e tipo de transformação dos dados acarretam variações consideráveis nas estimativas de herdabilidade. Este trabalho teve como objetivo avaliar a influência de dois tipos de transformação de dados na estimativa de parâmetros genéticos, para o caráter germinação de sementes, em Ocimum officinalis (Alfavacão). Para a análise estatística, os dados foram transformados em raiz quadrada de x + 0,5 e em arco seno da raiz quadrada das proporções observadas, em seguida foi realizada análise de variância para o caráter germinação de semente. O coeficiente de variação foi baixo (CVe=4,84%) não variando entre os métodos de transformação e demonstrando boa precisão para o ensaio. O caráter apresentou alta herdabilidade (h²=91%) e uma forte influência ambiental (CVg=9,10%). As transformações dos dados não afetaram as estimativas dos coeficientes de determinação genotípica e de variação genética. |
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Palavras-Chave: |
Herdabilidade; Ocimum officinalis; Variância. |
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Thesagro: |
Genética; Genótipo; Semente. |
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Categoria do assunto: |
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Marc: |
LEADER 01776naa a2200241 a 4500
001 1656201
005 2010-01-29
008 2009 bl uuuu u00u1 u #d
100 1 $aBRASILEIRO, B. P.
245 $aTransformação de dados e suas implicações na estimativa de parâmetros genéticos em alfavacão.
260 $c2009
500 $apdf 2388
520 $aMétodos de estimativa dos componentes de variância e tipo de transformação dos dados acarretam variações consideráveis nas estimativas de herdabilidade. Este trabalho teve como objetivo avaliar a influência de dois tipos de transformação de dados na estimativa de parâmetros genéticos, para o caráter germinação de sementes, em Ocimum officinalis (Alfavacão). Para a análise estatística, os dados foram transformados em raiz quadrada de x + 0,5 e em arco seno da raiz quadrada das proporções observadas, em seguida foi realizada análise de variância para o caráter germinação de semente. O coeficiente de variação foi baixo (CVe=4,84%) não variando entre os métodos de transformação e demonstrando boa precisão para o ensaio. O caráter apresentou alta herdabilidade (h²=91%) e uma forte influência ambiental (CVg=9,10%). As transformações dos dados não afetaram as estimativas dos coeficientes de determinação genotípica e de variação genética.
650 $aGenética
650 $aGenótipo
650 $aSemente
653 $aHerdabilidade
653 $aOcimum officinalis
653 $aVariância
700 1 $aLEDO, C. A. da S.
700 1 $aSANTOS, P. de A.
700 1 $aAMARAL, C. L. F.
773 $tIn: CONGRESSO BRASILEIRO DE MELHORAMENTO DE PLANTAS, 5., 2009, Guarapari. O melhoramento e os novos cenários da agricultura: anais. Vitória: Incaper, 2009. 1 CD-ROM.
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