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Registro Completo |
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Biblioteca(s): |
Biblioteca Rui Tendinha. |
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Data corrente: |
12/02/2016 |
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Data da última atualização: |
30/03/2016 |
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Autoria: |
SILVA, A. A. da.; SILVA, J. F. da.; BEGAZO, J. C. E. O.; CONDÉ, A. R. |
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Afiliação: |
Antonio Alberto da Silva, EMCAPA; José Francisco da Silva, UFV; José C. E. O. Begazo, UFV; Alcides Reis Condé, UFV. |
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Título: |
Controle químico de plantas daninhas na cultura da mandioca (Manihot esculenta Crantz). |
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Ano de publicação: |
1979 |
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Fonte/Imprenta: |
Cariacica: EMCAPA, 1979 |
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Páginas: |
26p. |
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Série: |
(EMCAPA. Boletim Técnico, 1). |
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Idioma: |
Português |
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Conteúdo: |
Estudou-se, no municipio de Ponta Nova, Minas Gerais, a efetividade ?dos herbicidas cotoran, diuron, linuron, surflan e 2,4-D, a combinacao destes com o diuron e, tambem, a mistura diuron + ametrina no controle de plantas daninhas na cultura da mandioca. As dosagens dos herbicidas, expressas em p.a./ha, foram de 3,0 kg quando aplicados isoladamente, a excecao do 2,4-D, que foi usado na concentracao de 2,0 litros/ha; quando em combinacao, as dosagens dos componentes das misturas foram reduzidas de 50%. Avaliacoes realizadas aos 35 a 70 dias apos a aplicacao dos herbicidas mostraram que nenhum deles ou suas misturas com o diuron foram fitotoxicos a cultura da mandioca, e que todos os tratamentos causaram certo controle das plantas daninhas, sendo o tratamento devrinol incorporaldo o de menor efetividade. O melhor tratamento para producao de ramas foi diuron + 2,4-D e, para producao de raizes, o diuron + surplan, que produziu 10,2% a mais em peso e 23,8% a mais em numero de raizes que o tratamento com capina. Menores valores para diametro do caule a 5 cm do solo, comprimento das raizes e indice de colheita foram obtidos pela testemunha sem capina. Nenhum dos tratamentos influenciou a porcentagem de amido existente nas raizes de mandioca, a altura das plantas e o diametro das raizes. |
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Palavras-Chave: |
Controle; Controle quimico; Cultivo; EMCAPA; Erva daninha; Ervas daninhas; Herbicida; Herbicidas; Mandioca; Pragas. |
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Categoria do assunto: |
-- |
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URL: |
http://biblioteca.incaper.es.gov.br/digital/bitstream/item/1185/1/BRT-Boletimtecnico-n1-Emcapa.pdf
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Marc: |
LEADER 02073nam a2200289 a 4500
001 1009610
005 2016-03-30
008 1979 bl uuuu u00u1 u #d
100 1 $aSILVA, A. A. da.
245 $aControle químico de plantas daninhas na cultura da mandioca (Manihot esculenta Crantz).$h[electronic resource]
260 $aCariacica: EMCAPA$c1979
300 $a26p.
490 $a(EMCAPA. Boletim Técnico, 1).
520 $aEstudou-se, no municipio de Ponta Nova, Minas Gerais, a efetividade ?dos herbicidas cotoran, diuron, linuron, surflan e 2,4-D, a combinacao destes com o diuron e, tambem, a mistura diuron + ametrina no controle de plantas daninhas na cultura da mandioca. As dosagens dos herbicidas, expressas em p.a./ha, foram de 3,0 kg quando aplicados isoladamente, a excecao do 2,4-D, que foi usado na concentracao de 2,0 litros/ha; quando em combinacao, as dosagens dos componentes das misturas foram reduzidas de 50%. Avaliacoes realizadas aos 35 a 70 dias apos a aplicacao dos herbicidas mostraram que nenhum deles ou suas misturas com o diuron foram fitotoxicos a cultura da mandioca, e que todos os tratamentos causaram certo controle das plantas daninhas, sendo o tratamento devrinol incorporaldo o de menor efetividade. O melhor tratamento para producao de ramas foi diuron + 2,4-D e, para producao de raizes, o diuron + surplan, que produziu 10,2% a mais em peso e 23,8% a mais em numero de raizes que o tratamento com capina. Menores valores para diametro do caule a 5 cm do solo, comprimento das raizes e indice de colheita foram obtidos pela testemunha sem capina. Nenhum dos tratamentos influenciou a porcentagem de amido existente nas raizes de mandioca, a altura das plantas e o diametro das raizes.
653 $aControle
653 $aControle quimico
653 $aCultivo
653 $aEMCAPA
653 $aErva daninha
653 $aErvas daninhas
653 $aHerbicida
653 $aHerbicidas
653 $aMandioca
653 $aPragas
700 1 $aSILVA, J. F. da.
700 1 $aBEGAZO, J. C. E. O.
700 1 $aCONDÉ, A. R.
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Registro original: |
Biblioteca Rui Tendinha (BRT) |
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Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
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Registro Completo |
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Biblioteca(s): |
Biblioteca Rui Tendinha. |
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Data corrente: |
29/11/2017 |
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Data da última atualização: |
18/06/2019 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
PADOVAN, M. da P.; BROOK, R. M.; BARRIOS, M.; CRUZ-CASTILHO, J. B.; VILCHEZ-MENDOZA; COSTA, A. N. da.; RAPIDEL, B. |
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Afiliação: |
Maria da Penha Padovan, Incaper; R.M. Brook, CATIE; M. Barrios, CATIE; J.B. Cruz-Castillo, UNA; S.J. Vilchez-Mendoza, CATIE; Aureliano Nogueira da Costa, Incaper; B. Rapidel, CIRAD. |
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Título: |
Water loss by transpiration and soil evaporation in coffee shaded by Tabebuia rosea Bertol. and Simarouba glauca dc. compared to unshaded coffee in sub-optimal environmental conditions |
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Ano de publicação: |
2018 |
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Fonte/Imprenta: |
Agricultural and Forest Meteorology, v. 248, p. 1-14, 2018. |
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Idioma: |
Inglês |
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Conteúdo: |
There is increasing concern that due to land pressure and the need to maximize income, smallholder coffee farmers are increasingly being forced to cultivate in areas which are considered to be sub-optimal for coffee. Little is known about optimal coffee and tree combinations in these conditions and the degree to which crops and trees compete or are synergistic. In environmental conditions which were sub optimal for coffee cultivation in Nicaragua (1470 mm annual rainfall, 27 °C mean annual temperature and 455 m altitude compared to optima of 2000 mm, 23?24 °C and altitude between 1000 and 1400 m at that latitude, respectively), coffee and shade tree transpiration and soil evaporation were directly and separately measured in agroforestry (AFS) and full sun systems (FS). AFS was found to be a more efficient water user than FS because a greater proportion of rainfall was used by plant transpiration rather than being lost by soil evaporation. Plant transpiration accounted for 83% and 69% of evapotranspiration while soil evaporation represented 17% and 31%, in AFS and FS respectively. In AFS most of the water transpiration was due to coffee (72.5%) and much less by deciduous Tabebuia rosea (19%) and evergreen Simarouba glauca shade trees (8.5%). Furthermore, the study demonstrated the vastly different behaviour in water use by the shade trees. When in leaf, Tabebuia rosea transpired at four to six times the rate of evergreen Simarouba glauca, although crown sizes were similar. Contrasting precipitation between two consecutive years of study demonstrated that competition for water between coffee and shade tree occurred only in a severe dry season when coffee leaf water potential (LWP) reached its lowest values of ?2.33 MPa in AFS. It was concluded that in most circumstances there was sufficient water for both coffee and trees, that coffee in AFS was a more efficient user of water than FS coffee, and that evergreen Simarouba glauca was more suitable as coffee shade tree compared to deciduous Tabebuia rosea in the sub optimal environmental condition studied MenosThere is increasing concern that due to land pressure and the need to maximize income, smallholder coffee farmers are increasingly being forced to cultivate in areas which are considered to be sub-optimal for coffee. Little is known about optimal coffee and tree combinations in these conditions and the degree to which crops and trees compete or are synergistic. In environmental conditions which were sub optimal for coffee cultivation in Nicaragua (1470 mm annual rainfall, 27 °C mean annual temperature and 455 m altitude compared to optima of 2000 mm, 23?24 °C and altitude between 1000 and 1400 m at that latitude, respectively), coffee and shade tree transpiration and soil evaporation were directly and separately measured in agroforestry (AFS) and full sun systems (FS). AFS was found to be a more efficient water user than FS because a greater proportion of rainfall was used by plant transpiration rather than being lost by soil evaporation. Plant transpiration accounted for 83% and 69% of evapotranspiration while soil evaporation represented 17% and 31%, in AFS and FS respectively. In AFS most of the water transpiration was due to coffee (72.5%) and much less by deciduous Tabebuia rosea (19%) and evergreen Simarouba glauca shade trees (8.5%). Furthermore, the study demonstrated the vastly different behaviour in water use by the shade trees. When in leaf, Tabebuia rosea transpired at four to six times the rate of evergreen Simarouba glauca, although crown sizes were similar. Co... Mostrar Tudo |
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Palavras-Chave: |
Coffee agroforestry; Coffee leaf water potential; Competition for water; Evapotranspiration. |
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Categoria do assunto: |
J Meteorologia |
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URL: |
https://biblioteca.incaper.es.gov.br/digital/bitstream/123456789/2879/1/BRT-PadovanBrooketal2017AgriculturalandForestMeteorology-padovan.pdf
https://www.sciencedirect.com/science/article/pii/S0168192317302873
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Marc: |
LEADER 02921naa a2200241 a 4500
001 1017263
005 2019-06-18
008 2018 bl uuuu u00u1 u #d
100 1 $aPADOVAN, M. da P.
245 $aWater loss by transpiration and soil evaporation in coffee shaded by Tabebuia rosea Bertol. and Simarouba glauca dc. compared to unshaded coffee in sub-optimal environmental conditions$h[electronic resource]
260 $c2018
520 $aThere is increasing concern that due to land pressure and the need to maximize income, smallholder coffee farmers are increasingly being forced to cultivate in areas which are considered to be sub-optimal for coffee. Little is known about optimal coffee and tree combinations in these conditions and the degree to which crops and trees compete or are synergistic. In environmental conditions which were sub optimal for coffee cultivation in Nicaragua (1470 mm annual rainfall, 27 °C mean annual temperature and 455 m altitude compared to optima of 2000 mm, 23?24 °C and altitude between 1000 and 1400 m at that latitude, respectively), coffee and shade tree transpiration and soil evaporation were directly and separately measured in agroforestry (AFS) and full sun systems (FS). AFS was found to be a more efficient water user than FS because a greater proportion of rainfall was used by plant transpiration rather than being lost by soil evaporation. Plant transpiration accounted for 83% and 69% of evapotranspiration while soil evaporation represented 17% and 31%, in AFS and FS respectively. In AFS most of the water transpiration was due to coffee (72.5%) and much less by deciduous Tabebuia rosea (19%) and evergreen Simarouba glauca shade trees (8.5%). Furthermore, the study demonstrated the vastly different behaviour in water use by the shade trees. When in leaf, Tabebuia rosea transpired at four to six times the rate of evergreen Simarouba glauca, although crown sizes were similar. Contrasting precipitation between two consecutive years of study demonstrated that competition for water between coffee and shade tree occurred only in a severe dry season when coffee leaf water potential (LWP) reached its lowest values of ?2.33 MPa in AFS. It was concluded that in most circumstances there was sufficient water for both coffee and trees, that coffee in AFS was a more efficient user of water than FS coffee, and that evergreen Simarouba glauca was more suitable as coffee shade tree compared to deciduous Tabebuia rosea in the sub optimal environmental condition studied
653 $aCoffee agroforestry
653 $aCoffee leaf water potential
653 $aCompetition for water
653 $aEvapotranspiration
700 1 $aBROOK, R. M.
700 1 $aBARRIOS, M.
700 1 $aCRUZ-CASTILHO, J. B.
700 1 $aVILCHEZ-MENDOZA
700 1 $aCOSTA, A. N. da.
700 1 $aRAPIDEL, B.
773 $tAgricultural and Forest Meteorology$gv. 248, p. 1-14, 2018.
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