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Registro Completo |
Biblioteca(s): |
Embrapa Agropecuária Oeste. |
Data corrente: |
04/03/2005 |
Data da última atualização: |
04/03/2005 |
Autoria: |
TAVARES, S. C. C. de; COSTA, V. S. de O. |
Título: |
Metodologia de amostragem e nível de ação para as principais doenças da mangueira no Vale do São Francisco. |
Ano de publicação: |
2002 |
Fonte/Imprenta: |
Petrolina: Embrapa Semi-Árido, 2002. |
Páginas: |
14 p. |
Série: |
(Embrapa Semi-Árido. Circular Técnica, 73). |
Idioma: |
Português |
Conteúdo: |
Generalidade sobre metodologia de amostragem e níveis de ação para doenças da mangueira; Principais doenças da mangueira no Vale do São Francisco no monitoramento da PIF. |
Thesagro: |
Doença; Manga. |
Categoria do assunto: |
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Marc: |
LEADER 00699nam a2200169 a 4500 001 1249812 005 2005-03-04 008 2002 bl uuuu u0uu1 u #d 100 1 $aTAVARES, S. C. C. de 245 $aMetodologia de amostragem e nível de ação para as principais doenças da mangueira no Vale do São Francisco. 260 $aPetrolina: Embrapa Semi-Árido$c2002 300 $a14 p. 490 $a(Embrapa Semi-Árido. Circular Técnica, 73). 520 $aGeneralidade sobre metodologia de amostragem e níveis de ação para doenças da mangueira; Principais doenças da mangueira no Vale do São Francisco no monitoramento da PIF. 650 $aDoença 650 $aManga 700 1 $aCOSTA, V. S. de O.
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Embrapa Agropecuária Oeste (CPAO) |
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| Acesso ao texto completo restrito à biblioteca da Embrapa Pecuária Sul. Para informações adicionais entre em contato com cppsul.biblioteca@embrapa.br. |
Registro Completo
Biblioteca(s): |
Embrapa Pecuária Sul. |
Data corrente: |
23/09/2021 |
Data da última atualização: |
23/09/2021 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
A - 2 |
Autoria: |
BOAVISTA, L. da R.; TRINDADE, J. P. P.; OVERBECK, G. E.; MÜLLER, S. C. |
Afiliação: |
LIDIANE DA ROSA BOAVISTA, UFRGS; JOSE PEDRO PEREIRA TRINDADE, CPPSUL; GERHARD ERNST OVERBECK, UFRGS; SANDRA CRISTINA MÜLLER, UFRGS. |
Título: |
Effects of grazing regimes on the temporal dynamics of grassland communities. |
Ano de publicação: |
2019 |
Fonte/Imprenta: |
Applied Vegetation Science, v. 22, n. 2, p. 326-335, Apr. 2019. |
Idioma: |
Inglês |
Conteúdo: |
Questions: Grazing management influences grassland community dynamics, but few studies exist on the effects of specific management regimes in subtropical grass- lands. Here, we ask how rotational and continuous grazing influences the composi- tion, diversity, and biomass production of natural grasslands in southern Brazil. Location: The study was conducted at four cattle farms within the south Brazilian grassland region (Campos Sulinos), in the upper area of the Camaquã river basin of Rio Grande do Sul, Brazil. Methods: On each farm, grassland that had previously been subjected to continuous grazing (freely grazed by cattle) was divided into two experimental units; one man- aged by rotational grazing and the other maintained under continuous grazing. In each experimental unit, 14 permanent plots were monitored over six years for spe- cies composition and species biomass. Data were analyzed using linear mixed models to evaluate the effects of grazing management strategies on composition dissimilar- ity, diversity indices, and plant biomass. Results: Grasslands under a rotational grazing regime changed steadily over the period of evaluation. Total biomass and species distribution patterns greatly differed from those in plots subjected to continuous grazing, leading to changes in species richness, dominance, and composition, as well as to an increase in overall plant biomass. Conclusions: Community changes during the six- year study period as a consequence of the distinct grazing treatments were evident. Grasslands under rotational grazing management benefitted from less selective grazing, enabling a more uniform growth of species within the communities, which in turn were richer at the end of the six- year experiment. In contrast, the proportion of grazing- resistant species or less- consumed species was higher under continuous grazing, where foraging by cattle appears to be more selective. Rotational grazing thus not only leads to higher species richness and diversity, but also to higher primary and, in consequence, secondary productivity MenosQuestions: Grazing management influences grassland community dynamics, but few studies exist on the effects of specific management regimes in subtropical grass- lands. Here, we ask how rotational and continuous grazing influences the composi- tion, diversity, and biomass production of natural grasslands in southern Brazil. Location: The study was conducted at four cattle farms within the south Brazilian grassland region (Campos Sulinos), in the upper area of the Camaquã river basin of Rio Grande do Sul, Brazil. Methods: On each farm, grassland that had previously been subjected to continuous grazing (freely grazed by cattle) was divided into two experimental units; one man- aged by rotational grazing and the other maintained under continuous grazing. In each experimental unit, 14 permanent plots were monitored over six years for spe- cies composition and species biomass. Data were analyzed using linear mixed models to evaluate the effects of grazing management strategies on composition dissimilar- ity, diversity indices, and plant biomass. Results: Grasslands under a rotational grazing regime changed steadily over the period of evaluation. Total biomass and species distribution patterns greatly differed from those in plots subjected to continuous grazing, leading to changes in species richness, dominance, and composition, as well as to an increase in overall plant biomass. Conclusions: Community changes during the six- year study period as a consequence of the distinct grazi... Mostrar Tudo |
Thesagro: |
Manejo; Pastagem; Pastejo. |
Categoria do assunto: |
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Marc: |
LEADER 02636naa a2200193 a 4500 001 2134724 005 2021-09-23 008 2019 bl uuuu u00u1 u #d 100 1 $aBOAVISTA, L. da R. 245 $aEffects of grazing regimes on the temporal dynamics of grassland communities.$h[electronic resource] 260 $c2019 520 $aQuestions: Grazing management influences grassland community dynamics, but few studies exist on the effects of specific management regimes in subtropical grass- lands. Here, we ask how rotational and continuous grazing influences the composi- tion, diversity, and biomass production of natural grasslands in southern Brazil. Location: The study was conducted at four cattle farms within the south Brazilian grassland region (Campos Sulinos), in the upper area of the Camaquã river basin of Rio Grande do Sul, Brazil. Methods: On each farm, grassland that had previously been subjected to continuous grazing (freely grazed by cattle) was divided into two experimental units; one man- aged by rotational grazing and the other maintained under continuous grazing. In each experimental unit, 14 permanent plots were monitored over six years for spe- cies composition and species biomass. Data were analyzed using linear mixed models to evaluate the effects of grazing management strategies on composition dissimilar- ity, diversity indices, and plant biomass. Results: Grasslands under a rotational grazing regime changed steadily over the period of evaluation. Total biomass and species distribution patterns greatly differed from those in plots subjected to continuous grazing, leading to changes in species richness, dominance, and composition, as well as to an increase in overall plant biomass. Conclusions: Community changes during the six- year study period as a consequence of the distinct grazing treatments were evident. Grasslands under rotational grazing management benefitted from less selective grazing, enabling a more uniform growth of species within the communities, which in turn were richer at the end of the six- year experiment. In contrast, the proportion of grazing- resistant species or less- consumed species was higher under continuous grazing, where foraging by cattle appears to be more selective. Rotational grazing thus not only leads to higher species richness and diversity, but also to higher primary and, in consequence, secondary productivity 650 $aManejo 650 $aPastagem 650 $aPastejo 700 1 $aTRINDADE, J. P. P. 700 1 $aOVERBECK, G. E. 700 1 $aMÜLLER, S. C. 773 $tApplied Vegetation Science$gv. 22, n. 2, p. 326-335, Apr. 2019.
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