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Registro Completo |
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Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
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Data corrente: |
27/11/2006 |
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Data da última atualização: |
20/09/2021 |
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Autoria: |
CARVALHO, J. E. B. de; SANTOS, R. C. dos; SOUZA, A. L. V. |
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Afiliação: |
JOSE EDUARDO BORGES DE CARVALHO, CNPMF; ROSANE CARDOSO DOS SANTOS, CNPQ; ANDRÉ LEONARDO VASCONCELOS SOUZA, CNPQ. |
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Título: |
Novo preparo e manejo do solo no controle do mato - contribuição ao desenvolvimento do sistema radicular dos citros. |
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Ano de publicação: |
2003 |
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Fonte/Imprenta: |
Cruz das Almas: Embrapa Mandioca e Fruticultura, 2003. |
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Páginas: |
4 p. |
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Série: |
( Embrapa Mandioca e Fruticultura. Comunicado Técnico, 85). |
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ISSN: |
1516-5744 |
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Idioma: |
Português |
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Conteúdo: |
As plantas cítricas necessitam de uma boa aeração no solo para o desenvolvimento do sistema radicular que explorando maior volume de solo e água, possibilita um melhor desenvolvimento da planta e aumento da produtividade, otimizando seu potencial genético produtivo. O manejo mecânico adotado pelos produtores no controle do mato e o trânsito exagerado de máquinas no pomar têm contribuído para aumentar a compactação do solo, redução da produção e a longevidade dos citros. Esse trabalho teve por objetivo avaliar o efeito de práticas culturais melhoradoras do solo no desenvolvimento do sistema radicular, buscando aumentar a superfície de absorção de nutrientes e, principalmente, de água, pelas plantas de um pomar de laranja 'Pêra' enxertada em limão 'Volkameriano'. |
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Palavras-Chave: |
Citros; Práticas culturais. |
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Thesagro: |
Fruta Cítrica; Manejo do Solo; Sistema Radicular. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/226149/1/Comunicado-85-pesquisavel.pdf
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Marc: |
LEADER 01544nam a2200229 a 4500
001 1652643
005 2021-09-20
008 2003 bl uuuu u0uu1 u #d
022 $a1516-5744
100 1 $aCARVALHO, J. E. B. de
245 $aNovo preparo e manejo do solo no controle do mato - contribuição ao desenvolvimento do sistema radicular dos citros.$h[electronic resource]
260 $aCruz das Almas: Embrapa Mandioca e Fruticultura$c2003
300 $a4 p.
490 $a( Embrapa Mandioca e Fruticultura. Comunicado Técnico, 85).
520 $aAs plantas cítricas necessitam de uma boa aeração no solo para o desenvolvimento do sistema radicular que explorando maior volume de solo e água, possibilita um melhor desenvolvimento da planta e aumento da produtividade, otimizando seu potencial genético produtivo. O manejo mecânico adotado pelos produtores no controle do mato e o trânsito exagerado de máquinas no pomar têm contribuído para aumentar a compactação do solo, redução da produção e a longevidade dos citros. Esse trabalho teve por objetivo avaliar o efeito de práticas culturais melhoradoras do solo no desenvolvimento do sistema radicular, buscando aumentar a superfície de absorção de nutrientes e, principalmente, de água, pelas plantas de um pomar de laranja 'Pêra' enxertada em limão 'Volkameriano'.
650 $aFruta Cítrica
650 $aManejo do Solo
650 $aSistema Radicular
653 $aCitros
653 $aPráticas culturais
700 1 $aSANTOS, R. C. dos
700 1 $aSOUZA, A. L. V.
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Embrapa Mandioca e Fruticultura (CNPMF) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Soja. Para informações adicionais entre em contato com valeria.cardoso@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Soja. |
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Data corrente: |
21/08/2008 |
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Data da última atualização: |
06/04/2009 |
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Autoria: |
MARTINS, P. T.; NUNES, D. H.; PASINI, A.; MOTTE, B.; SANTOS, A. A. dos; SILVA, S. H. da; BROWN, G. G. |
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Título: |
Efficiency of electroshocking and formol extraction of earthworms compared to handsorting in agricultural and natural ecosystems near Londrina, Brazil. |
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Ano de publicação: |
2006 |
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Fonte/Imprenta: |
In: International Symposium on Earthworm Ecology, 8., 2006, Kraków. Abstracts... Kraków: Jagiellonian University, 2006. p. 76. |
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Idioma: |
Inglês |
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Conteúdo: |
Sampling of earthworms is generally a labor intensive and time-consuming activity and means of reducing the time and effort necessary to sample earthworm populations are always welcome. Therefore, in the present study, we compared the efficiency of two "quicker" and "easier" alternatives (electro-shocking and dilute-formalin expulsion) in relation to the traditional hand-sorting method. Sampling was performed in four ecosystems: 1) Native forest (secondary vegetation); 2) edge of a cattail marsh; 3) sorghum croppìng (after harvest); and 4) a >10 yr old Cynodon spp. pasture grazed by horses. Electro-shocking (Thielemann octet method) was performed over an area of approximately 0.4 m2 for 20 min and immediately thereafter, earthworms were handsorted from 0.16 m2 soil monoliths, to a depth of 30 cm, directly underneath the electro-shocked area. Formalin (0.5%) was applied to a 1 m2 area, 5-m away, and the surfacing earthworms collected. Eight samples were taken in the forest and the marsh and 5 samples were taken in the agroecosystems. Earthworms were killed in alcohol (30%) and then fixed in formalin. All individuals collected with each method were counted (separately into age classes), weighed and identified to species level (when possible). Earthworm diversity was always higher with the handsorting method (forest = 8 spp., crop system = 6 spp., swamp = 3 spp., pasture = 2 spp.). Formol and electro-shocking yielded at most 3 species only, generally the fastermoving epigeics and poly-humic endogeics. Amynthas gracilis and Urobenus brasiliensis predominated in the forest, Pontoscolex corethrurus dominated in the marsh and various Dichogaster spp. dominated in the agroecosystems. Earthworm abundance was highest in the cropping system, followed by the forest, swamp and pasture. Efficiency of the sample methods depended on the ecosystem, the species and the measurement in question. At all sites, electro-shocking yielded the fewest earthworms, and the extraction efficiency, was generally low for the total earthworm population: from 0% in the pasture, where the soil was compact and drier, to around 20-30% in the remaining ecosystems. Formalin expulsion was also less efficient than handsorting (10-25%), except in the forest, where it yielded 5 times as many earthworms, primarily due to its efficient sampling of Amynthas and Urobenus spp. Electro-shocking and formalin appear to be interesting methods to sample mostly large, surface-active earthworms, whereas handsorting appears to be better suited for smaller, mostly endogeic earthworm species. Ideally, a combination of both methods should be attempted, to adequately sample both large and faster moving earthworms often missed by handsorting, and smaller, endogeic earthworms, not adequately sampled with formol or electricity. MenosSampling of earthworms is generally a labor intensive and time-consuming activity and means of reducing the time and effort necessary to sample earthworm populations are always welcome. Therefore, in the present study, we compared the efficiency of two "quicker" and "easier" alternatives (electro-shocking and dilute-formalin expulsion) in relation to the traditional hand-sorting method. Sampling was performed in four ecosystems: 1) Native forest (secondary vegetation); 2) edge of a cattail marsh; 3) sorghum croppìng (after harvest); and 4) a >10 yr old Cynodon spp. pasture grazed by horses. Electro-shocking (Thielemann octet method) was performed over an area of approximately 0.4 m2 for 20 min and immediately thereafter, earthworms were handsorted from 0.16 m2 soil monoliths, to a depth of 30 cm, directly underneath the electro-shocked area. Formalin (0.5%) was applied to a 1 m2 area, 5-m away, and the surfacing earthworms collected. Eight samples were taken in the forest and the marsh and 5 samples were taken in the agroecosystems. Earthworms were killed in alcohol (30%) and then fixed in formalin. All individuals collected with each method were counted (separately into age classes), weighed and identified to species level (when possible). Earthworm diversity was always higher with the handsorting method (forest = 8 spp., crop system = 6 spp., swamp = 3 spp., pasture = 2 spp.). Formol and electro-shocking yielded at most 3 species only, generally the fastermoving epigeics a... Mostrar Tudo |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 03499naa a2200193 a 4500
001 1470763
005 2009-04-06
008 2006 bl --- 0-- u #d
100 1 $aMARTINS, P. T.
245 $aEfficiency of electroshocking and formol extraction of earthworms compared to handsorting in agricultural and natural ecosystems near Londrina, Brazil.
260 $c2006
520 $aSampling of earthworms is generally a labor intensive and time-consuming activity and means of reducing the time and effort necessary to sample earthworm populations are always welcome. Therefore, in the present study, we compared the efficiency of two "quicker" and "easier" alternatives (electro-shocking and dilute-formalin expulsion) in relation to the traditional hand-sorting method. Sampling was performed in four ecosystems: 1) Native forest (secondary vegetation); 2) edge of a cattail marsh; 3) sorghum croppìng (after harvest); and 4) a >10 yr old Cynodon spp. pasture grazed by horses. Electro-shocking (Thielemann octet method) was performed over an area of approximately 0.4 m2 for 20 min and immediately thereafter, earthworms were handsorted from 0.16 m2 soil monoliths, to a depth of 30 cm, directly underneath the electro-shocked area. Formalin (0.5%) was applied to a 1 m2 area, 5-m away, and the surfacing earthworms collected. Eight samples were taken in the forest and the marsh and 5 samples were taken in the agroecosystems. Earthworms were killed in alcohol (30%) and then fixed in formalin. All individuals collected with each method were counted (separately into age classes), weighed and identified to species level (when possible). Earthworm diversity was always higher with the handsorting method (forest = 8 spp., crop system = 6 spp., swamp = 3 spp., pasture = 2 spp.). Formol and electro-shocking yielded at most 3 species only, generally the fastermoving epigeics and poly-humic endogeics. Amynthas gracilis and Urobenus brasiliensis predominated in the forest, Pontoscolex corethrurus dominated in the marsh and various Dichogaster spp. dominated in the agroecosystems. Earthworm abundance was highest in the cropping system, followed by the forest, swamp and pasture. Efficiency of the sample methods depended on the ecosystem, the species and the measurement in question. At all sites, electro-shocking yielded the fewest earthworms, and the extraction efficiency, was generally low for the total earthworm population: from 0% in the pasture, where the soil was compact and drier, to around 20-30% in the remaining ecosystems. Formalin expulsion was also less efficient than handsorting (10-25%), except in the forest, where it yielded 5 times as many earthworms, primarily due to its efficient sampling of Amynthas and Urobenus spp. Electro-shocking and formalin appear to be interesting methods to sample mostly large, surface-active earthworms, whereas handsorting appears to be better suited for smaller, mostly endogeic earthworm species. Ideally, a combination of both methods should be attempted, to adequately sample both large and faster moving earthworms often missed by handsorting, and smaller, endogeic earthworms, not adequately sampled with formol or electricity.
700 1 $aNUNES, D. H.
700 1 $aPASINI, A.
700 1 $aMOTTE, B.
700 1 $aSANTOS, A. A. dos
700 1 $aSILVA, S. H. da
700 1 $aBROWN, G. G.
773 $tIn: International Symposium on Earthworm Ecology, 8., 2006, Kraków. Abstracts... Kraków: Jagiellonian University, 2006. p. 76.
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