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Registro Completo |
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
15/09/2008 |
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Data da última atualização: |
03/10/2008 |
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Autoria: |
MOURA, N. G. de; SOUSA, J. T. R. de; MOURA, E. G. de; AGUIAR, A. das C. F.; LEMOS, R. N. S. de. |
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Título: |
Composition and structure of soil fauna in an alley cropping, a preliminary study. |
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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: |
In the humid tropic the soil fauna has fundamental importance for decomposition and nutrient
cycling. Such variation can indicate differences in the sustainability of management systems.
This objective this study was to evaluate the soil fauna in an alley cropping implanted in 2002
and designed to improve soil fertility. The completely randomized bloch with 4 replications test
in 6 trataments comprising mixtures of two legume trees with high quality residues - Leucaena
leucocephala (Lam.) DeWit) and Cajanus cajan (L.) Druce) and two legume trees of low quality
with residues - Clitoria fairchildiana (Howard) and Acacia mangium, as follow: Clitoria + Cajanus
(Cl+Cj); Leucaena + Cajanus (Lc+Cj); Acacia + Cajanus (Ac+Cj); Clitoria + Leucaena (Cl+Lc);
Leucaena + Acacia (Lc+Ac) and Control (without legume trees). The legumes were pruned in
January 2007 at 50 cm height and pruning was between the corn and cassava rows. Soil fauna
was captured May, 4 months after pruning, with pitfall traps using 300 ml plastic glasses. Five
traps were placed in each tratament, arranged in zig-zags resulting 30 traps per block. The
traps were activated after 2 days, in order to reduce the effects of excavation. The pitfall traps
remained in the field for 7 days, after which transfered to the laboratory, all specimens washed
and identified to level of major taxonomic groups. Diversity and eveness were evalueted with
Shannon´s and Pielou indices, and similarity between tratamentsevaluated with cluster analyses.
Mixtures of Lc+Cj presented the highest number of individuals following by Cl+Lc, the control
tratament and Ac+Cj mixtures had the lowest abundance of soil fauna. Our resultes suggest that
soil organisms prefer habitats with high residue quality. The groups with highest dominance
were mites and springtails, 65% (Lc+Cj), 52% (Cl+Lc), 37% (Control) and 55% (Ac+Cj). This
fact could be explained by the probable increase of the microbial and fungi populations during
the rainy season serving as food for the Collembolas. Some Acari, fungivorous, predators of
Collembola or detritivorous, which may have likewise benefitted by the increase in the microbial
population. These organisms possess short life cycles and they response storngly to food supply
by rapid reproduction we did not find any difference in richness or number of groups between
trataments, but was higher in the control than in the others trataments, indicating a greater activity
of soil fauna without residue aplication. This could be explained by fact that the contro plot were
situated in locations between the oders trataments, capturing soil organism migrating in search
for protection and food. Cluster analyses indicated that similarity was high between Cj+Ac and
Lc+Cj trataments suggesting that the fauna of the soil seeks for residue of high quality, and at
the same time refuge offered by the residues of low quality. MenosIn the humid tropic the soil fauna has fundamental importance for decomposition and nutrient
cycling. Such variation can indicate differences in the sustainability of management systems.
This objective this study was to evaluate the soil fauna in an alley cropping implanted in 2002
and designed to improve soil fertility. The completely randomized bloch with 4 replications test
in 6 trataments comprising mixtures of two legume trees with high quality residues - Leucaena
leucocephala (Lam.) DeWit) and Cajanus cajan (L.) Druce) and two legume trees of low quality
with residues - Clitoria fairchildiana (Howard) and Acacia mangium, as follow: Clitoria + Cajanus
(Cl+Cj); Leucaena + Cajanus (Lc+Cj); Acacia + Cajanus (Ac+Cj); Clitoria + Leucaena (Cl+Lc);
Leucaena + Acacia (Lc+Ac) and Control (without legume trees). The legumes were pruned in
January 2007 at 50 cm height and pruning was between the corn and cassava rows. Soil fauna
was captured May, 4 months after pruning, with pitfall traps using 300 ml plastic glasses. Five
traps were placed in each tratament, arranged in zig-zags resulting 30 traps per block. The
traps were activated after 2 days, in order to reduce the effects of excavation. The pitfall traps
remained in the field for 7 days, after which transfered to the laboratory, all specimens washed
and identified to level of major taxonomic groups. Diversity and eveness were evalueted with
Shannon´s and Pielou indices, and similarity between tratamentsevaluated with cluste... Mostrar Tudo |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 03670naa a2200169 a 4500
001 1314789
005 2008-10-03
008 2008 bl uuuu u00u1 u #d
100 1 $aMOURA, N. G. de
245 $aComposition and structure of soil fauna in an alley cropping, a preliminary study.
260 $c2008
520 $aIn the humid tropic the soil fauna has fundamental importance for decomposition and nutrient cycling. Such variation can indicate differences in the sustainability of management systems. This objective this study was to evaluate the soil fauna in an alley cropping implanted in 2002 and designed to improve soil fertility. The completely randomized bloch with 4 replications test in 6 trataments comprising mixtures of two legume trees with high quality residues - Leucaena leucocephala (Lam.) DeWit) and Cajanus cajan (L.) Druce) and two legume trees of low quality with residues - Clitoria fairchildiana (Howard) and Acacia mangium, as follow: Clitoria + Cajanus (Cl+Cj); Leucaena + Cajanus (Lc+Cj); Acacia + Cajanus (Ac+Cj); Clitoria + Leucaena (Cl+Lc); Leucaena + Acacia (Lc+Ac) and Control (without legume trees). The legumes were pruned in January 2007 at 50 cm height and pruning was between the corn and cassava rows. Soil fauna was captured May, 4 months after pruning, with pitfall traps using 300 ml plastic glasses. Five traps were placed in each tratament, arranged in zig-zags resulting 30 traps per block. The traps were activated after 2 days, in order to reduce the effects of excavation. The pitfall traps remained in the field for 7 days, after which transfered to the laboratory, all specimens washed and identified to level of major taxonomic groups. Diversity and eveness were evalueted with Shannon´s and Pielou indices, and similarity between tratamentsevaluated with cluster analyses. Mixtures of Lc+Cj presented the highest number of individuals following by Cl+Lc, the control tratament and Ac+Cj mixtures had the lowest abundance of soil fauna. Our resultes suggest that soil organisms prefer habitats with high residue quality. The groups with highest dominance were mites and springtails, 65% (Lc+Cj), 52% (Cl+Lc), 37% (Control) and 55% (Ac+Cj). This fact could be explained by the probable increase of the microbial and fungi populations during the rainy season serving as food for the Collembolas. Some Acari, fungivorous, predators of Collembola or detritivorous, which may have likewise benefitted by the increase in the microbial population. These organisms possess short life cycles and they response storngly to food supply by rapid reproduction we did not find any difference in richness or number of groups between trataments, but was higher in the control than in the others trataments, indicating a greater activity of soil fauna without residue aplication. This could be explained by fact that the contro plot were situated in locations between the oders trataments, capturing soil organism migrating in search for protection and food. Cluster analyses indicated that similarity was high between Cj+Ac and Lc+Cj trataments suggesting that the fauna of the soil seeks for residue of high quality, and at the same time refuge offered by the residues of low quality.
700 1 $aSOUSA, J. T. R. de
700 1 $aMOURA, E. G. de
700 1 $aAGUIAR, A. das C. F.
700 1 $aLEMOS, R. N. S. de
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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Origem |
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Registro Completo
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Biblioteca(s): |
Embrapa Milho e Sorgo. |
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Data corrente: |
12/03/1997 |
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Data da última atualização: |
11/12/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
FERRAO, R. G.; GAMA, E. E. G. e; FERRAO, M. A. G.; SANTOS, J. A. C. |
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Afiliação: |
EMBRAPA-CNPMS. |
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Título: |
Três ciclos de seleção entre e dentro de famílias de meios irmãos na população de milho EEL. |
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Ano de publicação: |
1995 |
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Fonte/Imprenta: |
Pesquisa Agropecuária Brasileira, Brasília, v. 30, n. 9, p. 1195-1200, 1995. |
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Idioma: |
Português |
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Conteúdo: |
Foram estudados tres ciclos de selecao entre e dentro de familias de meios irmaos na populacao de milho EEL, nas regioes norte, sul e serrana do Espirito Santo, de 1985 a 1988. Em cada ano foram avaliadas 200 progenies, usando-se dois latices 10 x 10. Aplicaram-se indices de 15% de selecao entre as progenies, e de 12,5% dentro das progenies na recombinacao. Para o carater peso de espigas, nas analises de variancia endividuais e conjuntas, foram detectadas diferencas altamente significativas para progenies e para interacao progenies x locais. As progenies apresentaram, em media, bom desempenho, com producoes de 91,0g, 129,3g e 153,5g /planta do 1o. ao 3o. ciclo de selecao, respectivamente. As herdabilidades no sentido restrito variaram entre locais e por ciclo, com valores entre 12,0% e 44,0%; em media, foram de 28,6%, 12,0% e 26,2% do primeiro ao terceiro ciclo, respectivamente. As magnitudes dos parametros geneticos, principalmente no terceiro ciclo, traduzem a variabilidade exibida pela populacao, que, associada as altas medias de produtividade das progenies, mostra a importancia desta populacao em um programa de melhoramento. O ganho genetico medio esperado com a selecao por ciclo de forma conjunta do primeiro ao terceiro ciclo foi de 6,5%, 3,0% e 4,0%. Se a selecao tivesse sido efetuada por local, o ganho genetico teria sido maior e poderia ter atingido ate 12,3%. |
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Palavras-Chave: |
Brasil; Ear yield; Espirito Santo; Genetic parameters; Maize; Parametros geneticos. |
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Thesagro: |
Espiga; Melhoramento; Milho; Produção; Zea Mays. |
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Thesaurus NAL: |
Brazil; breeding. |
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Categoria do assunto: |
G Melhoramento Genético |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/AI-SEDE/15597/1/pab95_09_set.pdf
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Marc: |
LEADER 02261naa a2200313 a 4500
001 1474690
005 2021-12-11
008 1995 bl uuuu u00u1 u #d
100 1 $aFERRAO, R. G.
245 $aTrês ciclos de seleção entre e dentro de famílias de meios irmãos na população de milho EEL.$h[electronic resource]
260 $c1995
520 $aForam estudados tres ciclos de selecao entre e dentro de familias de meios irmaos na populacao de milho EEL, nas regioes norte, sul e serrana do Espirito Santo, de 1985 a 1988. Em cada ano foram avaliadas 200 progenies, usando-se dois latices 10 x 10. Aplicaram-se indices de 15% de selecao entre as progenies, e de 12,5% dentro das progenies na recombinacao. Para o carater peso de espigas, nas analises de variancia endividuais e conjuntas, foram detectadas diferencas altamente significativas para progenies e para interacao progenies x locais. As progenies apresentaram, em media, bom desempenho, com producoes de 91,0g, 129,3g e 153,5g /planta do 1o. ao 3o. ciclo de selecao, respectivamente. As herdabilidades no sentido restrito variaram entre locais e por ciclo, com valores entre 12,0% e 44,0%; em media, foram de 28,6%, 12,0% e 26,2% do primeiro ao terceiro ciclo, respectivamente. As magnitudes dos parametros geneticos, principalmente no terceiro ciclo, traduzem a variabilidade exibida pela populacao, que, associada as altas medias de produtividade das progenies, mostra a importancia desta populacao em um programa de melhoramento. O ganho genetico medio esperado com a selecao por ciclo de forma conjunta do primeiro ao terceiro ciclo foi de 6,5%, 3,0% e 4,0%. Se a selecao tivesse sido efetuada por local, o ganho genetico teria sido maior e poderia ter atingido ate 12,3%.
650 $aBrazil
650 $abreeding
650 $aEspiga
650 $aMelhoramento
650 $aMilho
650 $aProdução
650 $aZea Mays
653 $aBrasil
653 $aEar yield
653 $aEspirito Santo
653 $aGenetic parameters
653 $aMaize
653 $aParametros geneticos
700 1 $aGAMA, E. E. G. e
700 1 $aFERRAO, M. A. G.
700 1 $aSANTOS, J. A. C.
773 $tPesquisa Agropecuária Brasileira, Brasília$gv. 30, n. 9, p. 1195-1200, 1995.
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Embrapa Milho e Sorgo (CNPMS) |
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