Response of caatinga vegetation to decreasing levels of canopy cover
Autor(a) principal: | |
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Data de Publicação: | 2014 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Pesquisa Agropecuária Brasileira (Online) |
Texto Completo: | https://seer.sct.embrapa.br/index.php/pab/article/view/16549 |
Resumo: | Although clearing of the caatinga forest is conducted primarily to open areas 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 experiments at the CNPC, Sobral, CE, Brazil. Complete removal of the tree canopy resulted in a six to eightfold increase in first year production of herbaceous vegetation. This magnitude of increase was also true for canopy 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 the fourth year post treatment. As a result, herbaceous vegetation and leaf litter yields 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 post treatment 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 that a multiple use approach involving selectively thinned caatinga could be developed whereby production of the naturally renewable wood and forage resources would be optimized |
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Response of caatinga vegetation to decreasing levels of canopy coverResposta da vegetação da caatinga a vários níveis de raleamentovegetation manipulation; coppice; Mimosa caesalpiniaefoliamanejo de caatinga; rebrote; sabiá; Mimosa caesalpiniaefoliaAlthough clearing of the caatinga forest is conducted primarily to open areas 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 experiments at the CNPC, Sobral, CE, Brazil. Complete removal of the tree canopy resulted in a six to eightfold increase in first year production of herbaceous vegetation. This magnitude of increase was also true for canopy 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 the fourth year post treatment. As a result, herbaceous vegetation and leaf litter yields 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 post treatment 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 that a multiple use approach involving selectively thinned caatinga could be developed whereby production of the naturally renewable wood and forage resources would be optimizedMuito embora o desmatamento da caatinga seja conduzido visando principalmente a abertura de novas áreas para produção de alimentos e para utilização da madeira, sua manipulação está sendo indicada como uma maneira de aumentar a disponibilidade de forragem. A resposta da vegetação da caatinga a vários níveis de desmatamento está sendo estudada em dois experimentos no Centro Nacional de Pesquisa de Caprinos, em Sobral, Ceará. A remoção total da copa das árvores produziu um aumento de seis a oito vezes na produção do estrato herbáceo durante o primeiro ano. Esta mesma intensidade de resposta foi obtida com a manutenção dos níveis da copa das árvores entre 20 e 30% e entre 50 e 60%. A regeneração das espécies cortadas foi rápida, e o nível de cobertura da copa para o tratamento com desmatamento total foi praticamente igual (aproximadamente 95%) ao das áreas não desmatadas (controle) quatro anos após o desmatamento. Como resultado dessa regeneração, a produção de biomassa do estrato herbáceo e a produção de folhas das árvores também foram similares ente os dois tratamentos. O desmatamento não somente favoreceu o estabelecimento de novas plantas, mas também a produção de biomassa originária da regeneração das áreas desmatadas foi cerca de dez vezes superior à produção das árvores da área-controle. A alta produção do estrato herbáceo durante o primeiro ano e a resposta de espécies desejáveis como sabiá (Mimosa caesalpiniaefolia) ao desmatamento indicam que a utilização de um sistema de manipulação seletivo da caatinga pode ser desenvolvido.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraSchacht, Walter H.Mesquita, Roberto C. M.Malechek, John C.Kirmse, Robeat D.2014-04-17info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/16549Pesquisa Agropecuaria Brasileira; v.24, n.11, nov. 1989; 1421-1426Pesquisa Agropecuária Brasileira; v.24, n.11, nov. 1989; 1421-14261678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAenghttps://seer.sct.embrapa.br/index.php/pab/article/view/16549/10825info:eu-repo/semantics/openAccess2014-08-29T19:34:04Zoai:ojs.seer.sct.embrapa.br:article/16549Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-08-29T19:34:04Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false |
dc.title.none.fl_str_mv |
Response of caatinga vegetation to decreasing levels of canopy cover Resposta da vegetação da caatinga a vários níveis de raleamento |
title |
Response of caatinga vegetation to decreasing levels of canopy cover |
spellingShingle |
Response of caatinga vegetation to decreasing levels of canopy cover Schacht, Walter H. vegetation manipulation; coppice; Mimosa caesalpiniaefolia manejo de caatinga; rebrote; sabiá; Mimosa caesalpiniaefolia |
title_short |
Response of caatinga vegetation to decreasing levels of canopy cover |
title_full |
Response of caatinga vegetation to decreasing levels of canopy cover |
title_fullStr |
Response of caatinga vegetation to decreasing levels of canopy cover |
title_full_unstemmed |
Response of caatinga vegetation to decreasing levels of canopy cover |
title_sort |
Response of caatinga vegetation to decreasing levels of canopy cover |
author |
Schacht, Walter H. |
author_facet |
Schacht, Walter H. Mesquita, Roberto C. M. Malechek, John C. Kirmse, Robeat D. |
author_role |
author |
author2 |
Mesquita, Roberto C. M. Malechek, John C. Kirmse, Robeat D. |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
|
dc.contributor.author.fl_str_mv |
Schacht, Walter H. Mesquita, Roberto C. M. Malechek, John C. Kirmse, Robeat D. |
dc.subject.por.fl_str_mv |
vegetation manipulation; coppice; Mimosa caesalpiniaefolia manejo de caatinga; rebrote; sabiá; Mimosa caesalpiniaefolia |
topic |
vegetation manipulation; coppice; Mimosa caesalpiniaefolia manejo de caatinga; rebrote; sabiá; Mimosa caesalpiniaefolia |
description |
Although clearing of the caatinga forest is conducted primarily to open areas 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 experiments at the CNPC, Sobral, CE, Brazil. Complete removal of the tree canopy resulted in a six to eightfold increase in first year production of herbaceous vegetation. This magnitude of increase was also true for canopy 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 the fourth year post treatment. As a result, herbaceous vegetation and leaf litter yields 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 post treatment 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 that a multiple use approach involving selectively thinned caatinga could be developed whereby production of the naturally renewable wood and forage resources would be optimized |
publishDate |
2014 |
dc.date.none.fl_str_mv |
2014-04-17 |
dc.type.none.fl_str_mv |
|
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://seer.sct.embrapa.br/index.php/pab/article/view/16549 |
url |
https://seer.sct.embrapa.br/index.php/pab/article/view/16549 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
https://seer.sct.embrapa.br/index.php/pab/article/view/16549/10825 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Pesquisa Agropecuaria Brasileira Pesquisa Agropecuária Brasileira |
publisher.none.fl_str_mv |
Pesquisa Agropecuaria Brasileira Pesquisa Agropecuária Brasileira |
dc.source.none.fl_str_mv |
Pesquisa Agropecuaria Brasileira; v.24, n.11, nov. 1989; 1421-1426 Pesquisa Agropecuária Brasileira; v.24, n.11, nov. 1989; 1421-1426 1678-3921 0100-104x reponame:Pesquisa Agropecuária Brasileira (Online) instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa) instacron:EMBRAPA |
instname_str |
Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
instacron_str |
EMBRAPA |
institution |
EMBRAPA |
reponame_str |
Pesquisa Agropecuária Brasileira (Online) |
collection |
Pesquisa Agropecuária Brasileira (Online) |
repository.name.fl_str_mv |
Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
repository.mail.fl_str_mv |
pab@sct.embrapa.br || sct.pab@embrapa.br |
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1793416671013109760 |