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Registro Completo |
Biblioteca(s): |
Embrapa Algodão. |
Data corrente: |
22/09/2006 |
Data da última atualização: |
22/09/2006 |
Autoria: |
JIMENEZ, A.; GOMEZ, A. C. |
Título: |
Umbrales de innovacion en la recoleccion mecanizada de algodon. |
Ano de publicação: |
1997 |
Fonte/Imprenta: |
Investigacion Agraria - Economia, v.12,n.1/3,p.49-64,1997. |
Idioma: |
Espanhol |
Palavras-Chave: |
Córdoba; Difusão tecnológica; Recoleção mecanizada. |
Thesagro: |
Algodão. |
Categoria do assunto: |
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Marc: |
LEADER 00482naa a2200169 a 4500 001 1264759 005 2006-09-22 008 1997 bl --- 0-- u #d 100 1 $aJIMENEZ, A. 245 $aUmbrales de innovacion en la recoleccion mecanizada de algodon. 260 $c1997 650 $aAlgodão 653 $aCórdoba 653 $aDifusão tecnológica 653 $aRecoleção mecanizada 700 1 $aGOMEZ, A. C. 773 $tInvestigacion Agraria - Economia$gv.12,n.1/3,p.49-64,1997.
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Embrapa Algodão (CNPA) |
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Registro Completo
Biblioteca(s): |
Embrapa Unidades Centrais. |
Data corrente: |
15/05/2002 |
Data da última atualização: |
15/05/2002 |
Autoria: |
SCHACHT, W. H.; MESQUITA, R. C. M.; MALECHEK, J. C.; KIRMSE, R. D. |
Título: |
Response of Caatinga Vegetation to Decreasing Levels of Canopy Cover. |
Ano de publicação: |
1989 |
Fonte/Imprenta: |
Pesquisa Agropecuária Brasileira, Brasília, v. 24, n.11, p.14121-1426, nov. 1989 |
Idioma: |
Português |
Conteúdo: |
Although clearing of the caatinga forest is conducted primarily to open arcas for crop production and to harvest wood, vegetation manipulation is being promoted as a means of increasing forage availability to livestock. Response of caatinga vegetation to various; levels of canopy cover removal is being studied in two experimerits at the CNPC, Sobral, CE, Brazil. Complete removal of the tree canopy resulted in a six to eightfo"d increase in first year production of herbaceous vegetation. This magnitude of increase was also true for ranopy covers of 20% - 30% and 50% - 60%. Caatinga species coppice readily following cutting and, therefore, canopy cover for the cleared treatment (complete removal) was equal to that of the control (approximately 95 %) by the end of die fourth ycar posttreatment. As a result, herbaceous vegetation and leaf litter yiclds for the two treatments were similar, too. Sabiá (Mimosa caesalpiniaefolia), a tree species which produces palatable browse and valuable wood, responded very favorably to clearing. Not only did many new plants establish, but by the fourth year posttreatment sabiá coppice on the cleared areas produced as much as ten times more foliar biomass than did the intact trees on the control area. The high herbaceous vegetation yields under a thinned canopy and the favorable responses; to cutting of tree species; such as sabiá indicate diat a multiple use approach involving selectively thinned caatinga could be developed whereby production of the naturally renewable wood and forage resources would be optimized. MenosAlthough clearing of the caatinga forest is conducted primarily to open arcas for crop production and to harvest wood, vegetation manipulation is being promoted as a means of increasing forage availability to livestock. Response of caatinga vegetation to various; levels of canopy cover removal is being studied in two experimerits at the CNPC, Sobral, CE, Brazil. Complete removal of the tree canopy resulted in a six to eightfo"d increase in first year production of herbaceous vegetation. This magnitude of increase was also true for ranopy covers of 20% - 30% and 50% - 60%. Caatinga species coppice readily following cutting and, therefore, canopy cover for the cleared treatment (complete removal) was equal to that of the control (approximately 95 %) by the end of die fourth ycar posttreatment. As a result, herbaceous vegetation and leaf litter yiclds for the two treatments were similar, too. Sabiá (Mimosa caesalpiniaefolia), a tree species which produces palatable browse and valuable wood, responded very favorably to clearing. Not only did many new plants establish, but by the fourth year posttreatment sabiá coppice on the cleared areas produced as much as ten times more foliar biomass than did the intact trees on the control area. The high herbaceous vegetation yields under a thinned canopy and the favorable responses; to cutting of tree species; such as sabiá indicate diat a multiple use approach involving selectively thinned caatinga could be developed whereby production of... Mostrar Tudo |
Palavras-Chave: |
coppice; vegetation manipulation. |
Thesagro: |
Mimosa Caesalpiniaefolia. |
Categoria do assunto: |
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Marc: |
LEADER 02150naa a2200193 a 4500 001 1107226 005 2002-05-15 008 1989 bl uuuu u00u1 u #d 100 1 $aSCHACHT, W. H. 245 $aResponse of Caatinga Vegetation to Decreasing Levels of Canopy Cover. 260 $c1989 520 $aAlthough clearing of the caatinga forest is conducted primarily to open arcas for crop production and to harvest wood, vegetation manipulation is being promoted as a means of increasing forage availability to livestock. Response of caatinga vegetation to various; levels of canopy cover removal is being studied in two experimerits at the CNPC, Sobral, CE, Brazil. Complete removal of the tree canopy resulted in a six to eightfo"d increase in first year production of herbaceous vegetation. This magnitude of increase was also true for ranopy covers of 20% - 30% and 50% - 60%. Caatinga species coppice readily following cutting and, therefore, canopy cover for the cleared treatment (complete removal) was equal to that of the control (approximately 95 %) by the end of die fourth ycar posttreatment. As a result, herbaceous vegetation and leaf litter yiclds for the two treatments were similar, too. Sabiá (Mimosa caesalpiniaefolia), a tree species which produces palatable browse and valuable wood, responded very favorably to clearing. Not only did many new plants establish, but by the fourth year posttreatment sabiá coppice on the cleared areas produced as much as ten times more foliar biomass than did the intact trees on the control area. The high herbaceous vegetation yields under a thinned canopy and the favorable responses; to cutting of tree species; such as sabiá indicate diat a multiple use approach involving selectively thinned caatinga could be developed whereby production of the naturally renewable wood and forage resources would be optimized. 650 $aMimosa Caesalpiniaefolia 653 $acoppice 653 $avegetation manipulation 700 1 $aMESQUITA, R. C. M. 700 1 $aMALECHEK, J. C. 700 1 $aKIRMSE, R. D. 773 $tPesquisa Agropecuária Brasileira, Brasília$gv. 24, n.11, p.14121-1426, nov. 1989
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