| |
|
|
|
Registro Completo |
|
Biblioteca(s): |
Biblioteca Rui Tendinha. |
|
Data corrente: |
27/07/2015 |
|
Data da última atualização: |
28/07/2015 |
|
Autoria: |
GASSEN, D. N. |
|
Título: |
Efeitos de níveis populacionais de Nezara viridula sobre a cultura da soja, em dois períodos de infestação. |
|
Ano de publicação: |
1980 |
|
Fonte/Imprenta: |
Porto Alegre : UFRGS, 1980. |
|
Páginas: |
84 p. |
|
Idioma: |
Português |
|
Notas: |
UFRGS. Tese Mestrado. |
|
Conteúdo: |
Este trabalho foi conduzido em lavoura de soja, localizada no Municipio de Santa Rosa (RS), durante a safra 1979/80, com a cultivar Santa Rosa. Teve-se como objetivo avaliar a influencia, durante 21 dias, de quatro niveis populacionais (0, 4, 8 e 16/m) dias, de Nezara viridula (L., 1758), sob tres condicoes experimentais em funcao de estadios de desenvolvimento da cultura iniciando em R2 e R5 (escala de FEHR e Caviness, 1977) e fases de desenvolvimento do inseto (adultos e ninfas de quarto e quinto instares) no rendimento de graos e seus componentes e na retencao foliar). Observaram-se efeitos significativos dos tratamentos, expressos atraves de regressoes, sobre o rendimento de graos, percentagens de legumes chochos e com graos, numero de graos, percentagens de graos de acordo com o grau de danos e retencao foliar da soja. O experimento, nas condicoes em que foi executado, visando avaliar a influencia de Nezara viridula em quatro niveis populacionais com percevejos adultos no primeiro periodo (R2 a R4) e adultos ou ninfas de quarto e quinto instares no segundo periodo (R5 a R6) de infestacao, sobre a cultura da soja, permitiu as seguintes conclusoes: - os niveis populacionais de percevejos adultos provocaram decrescimos lineares no rendimento de graos nos dois periodos de infestacao, causando reducoes mais intensas no segundo periodo (Figura1); - os resultados com ninfas nao permitiram evidenciar influencias significativas no rendimento de graos; - no segundo periodo de infestacao a percentagem de legumes....... MenosEste trabalho foi conduzido em lavoura de soja, localizada no Municipio de Santa Rosa (RS), durante a safra 1979/80, com a cultivar Santa Rosa. Teve-se como objetivo avaliar a influencia, durante 21 dias, de quatro niveis populacionais (0, 4, 8 e 16/m) dias, de Nezara viridula (L., 1758), sob tres condicoes experimentais em funcao de estadios de desenvolvimento da cultura iniciando em R2 e R5 (escala de FEHR e Caviness, 1977) e fases de desenvolvimento do inseto (adultos e ninfas de quarto e quinto instares) no rendimento de graos e seus componentes e na retencao foliar). Observaram-se efeitos significativos dos tratamentos, expressos atraves de regressoes, sobre o rendimento de graos, percentagens de legumes chochos e com graos, numero de graos, percentagens de graos de acordo com o grau de danos e retencao foliar da soja. O experimento, nas condicoes em que foi executado, visando avaliar a influencia de Nezara viridula em quatro niveis populacionais com percevejos adultos no primeiro periodo (R2 a R4) e adultos ou ninfas de quarto e quinto instares no segundo periodo (R5 a R6) de infestacao, sobre a cultura da soja, permitiu as seguintes conclusoes: - os niveis populacionais de percevejos adultos provocaram decrescimos lineares no rendimento de graos nos dois periodos de infestacao, causando reducoes mais intensas no segundo periodo (Figura1); - os resultados com ninfas nao permitiram evidenciar influencias significativas no rendimento de graos; - no segundo periodo de inf... Mostrar Tudo |
|
Palavras-Chave: |
Animal population; Heteroptera; Infestacao; Infestation; Insect; Insecta; Inseto; Milho-Pragas-Manejo; Nezara viridula; Niveis populacionais; Percevejo; Pest; Pest insects; Praga; Producao; Soja; Soybean; Soybeans; Yields. |
|
Categoria do assunto: |
-- |
|
Marc: |
LEADER 02446nam a2200361 a 4500
001 1007089
005 2015-07-28
008 1980 bl uuuu u0uu1 u #d
100 1 $aGASSEN, D. N.
245 $aEfeitos de níveis populacionais de Nezara viridula sobre a cultura da soja, em dois períodos de infestação.
260 $aPorto Alegre : UFRGS$c1980
300 $a84 p.
500 $aUFRGS. Tese Mestrado.
520 $aEste trabalho foi conduzido em lavoura de soja, localizada no Municipio de Santa Rosa (RS), durante a safra 1979/80, com a cultivar Santa Rosa. Teve-se como objetivo avaliar a influencia, durante 21 dias, de quatro niveis populacionais (0, 4, 8 e 16/m) dias, de Nezara viridula (L., 1758), sob tres condicoes experimentais em funcao de estadios de desenvolvimento da cultura iniciando em R2 e R5 (escala de FEHR e Caviness, 1977) e fases de desenvolvimento do inseto (adultos e ninfas de quarto e quinto instares) no rendimento de graos e seus componentes e na retencao foliar). Observaram-se efeitos significativos dos tratamentos, expressos atraves de regressoes, sobre o rendimento de graos, percentagens de legumes chochos e com graos, numero de graos, percentagens de graos de acordo com o grau de danos e retencao foliar da soja. O experimento, nas condicoes em que foi executado, visando avaliar a influencia de Nezara viridula em quatro niveis populacionais com percevejos adultos no primeiro periodo (R2 a R4) e adultos ou ninfas de quarto e quinto instares no segundo periodo (R5 a R6) de infestacao, sobre a cultura da soja, permitiu as seguintes conclusoes: - os niveis populacionais de percevejos adultos provocaram decrescimos lineares no rendimento de graos nos dois periodos de infestacao, causando reducoes mais intensas no segundo periodo (Figura1); - os resultados com ninfas nao permitiram evidenciar influencias significativas no rendimento de graos; - no segundo periodo de infestacao a percentagem de legumes.......
653 $aAnimal population
653 $aHeteroptera
653 $aInfestacao
653 $aInfestation
653 $aInsect
653 $aInsecta
653 $aInseto
653 $aMilho-Pragas-Manejo
653 $aNezara viridula
653 $aNiveis populacionais
653 $aPercevejo
653 $aPest
653 $aPest insects
653 $aPraga
653 $aProducao
653 $aSoja
653 $aSoybean
653 $aSoybeans
653 $aYields
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Biblioteca Rui Tendinha (BRT) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
|
|
|
Registro Completo |
|
Biblioteca(s): |
Biblioteca Rui Tendinha. |
|
Data corrente: |
15/07/2021 |
|
Data da última atualização: |
15/07/2021 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Circulação/Nível: |
A - 1 |
|
Autoria: |
LOURENÇO JR, J.; NEWMAN, E. A.; VENTURA, J. A.; MILANEZ, C. R. D.; THOMAZ, L. D.; WANDEKOKEN, D.T.; ENQUIST, B. J. |
|
Afiliação: |
Jehová Lourenço Jr; Erica A. Newman; Jose Aires Ventura, Incaper; Camilla Rozindo Dias Milanez; Luciana Dias Thomaz; Douglas Tinoco Wandekoken; Brian J. Enquist. |
|
Título: |
Soil-associated drivers of plant traits and functional composition in Atlantic Forest coastal tree communities. |
|
Ano de publicação: |
2021 |
|
Fonte/Imprenta: |
Ecosphere , v. 12, n. 7, e03629, 2021. |
|
Idioma: |
Português |
|
Conteúdo: |
The severe deforestation of Brazil?s Atlantic Forest and the increasing effects of climate change underscore the need to understand how tree species respond to climate and edaphic factors. To identify the most important environmental drivers of coastal Atlantic Forest diversity and functional composition, we studied 42 plots of coastal Atlantic Forest (restinga), which has a high diversity of plant communities and spans strong environmental gradients. We examined how forest physiognomy and functional composition respond to changes in the environment, hydraulic, and soil properties. We tested different hypotheses relating the roles of nutrients and soil water availability in driving shifts in tropical forest diversity and functioning. We collected wood samples and leaves from ~85% of the plant species identified in the forest inventory and estimated the community-weighted tree height, aboveground biomass, basal area of individual plants, specific leaf area, wood density, and the total tree biomass per community by the sum of all trees? aboveground biomass per plot. We measured water table depth and 24 physicochemical soil parameters.
Hypotheses relating to these factors were formalized via both generalized additive models and piecewise structural equation models and null models of community assembly. Increasing drought, as reflected by increasing water table depth, coarse sand, and soil concentration of aluminum (>6 cmol/kg), was found
to be a primary driver of shifts in all measured functional traits. Water table depth was found to be the main environmental driver of restinga species diversity, but shifts in species richness were largely decoupled from functional richness and functional dispersion. Our results suggest that decreases in soil water
availability are a central driver of local phenotype?environment matching and that increasing water limitation increases the role of environmental filtering on multiple traits. Our results show that drought leads to a strong convergence (standardized effect size < 1.95) in forest function and leads to shifts to smaller statured
forest in particular. These findings reveal important differences in the drivers of forest structure and functioning, suggesting that changes in local spatial variation in soil and moisture variables will be a central issue in restinga management and conservation. MenosThe severe deforestation of Brazil?s Atlantic Forest and the increasing effects of climate change underscore the need to understand how tree species respond to climate and edaphic factors. To identify the most important environmental drivers of coastal Atlantic Forest diversity and functional composition, we studied 42 plots of coastal Atlantic Forest (restinga), which has a high diversity of plant communities and spans strong environmental gradients. We examined how forest physiognomy and functional composition respond to changes in the environment, hydraulic, and soil properties. We tested different hypotheses relating the roles of nutrients and soil water availability in driving shifts in tropical forest diversity and functioning. We collected wood samples and leaves from ~85% of the plant species identified in the forest inventory and estimated the community-weighted tree height, aboveground biomass, basal area of individual plants, specific leaf area, wood density, and the total tree biomass per community by the sum of all trees? aboveground biomass per plot. We measured water table depth and 24 physicochemical soil parameters.
Hypotheses relating to these factors were formalized via both generalized additive models and piecewise structural equation models and null models of community assembly. Increasing drought, as reflected by increasing water table depth, coarse sand, and soil concentration of aluminum (>6 cmol/kg), was found
to be a primary driver of shifts in all... Mostrar Tudo |
|
Palavras-Chave: |
Atlantic Forest; Boveground biomass; Functional traits; Physiognomy. |
|
Thesagro: |
Restinga. |
|
Thesaurus NAL: |
Aluminum; Biodiversity; Brazil; Salinity. |
|
Categoria do assunto: |
-- |
|
URL: |
https://biblioteca.incaper.es.gov.br/digital/bitstream/123456789/4215/1/Soil-associated-ventura.pdf
|
|
Marc: |
LEADER 03215naa a2200301 a 4500
001 1023347
005 2021-07-15
008 2021 bl uuuu u00u1 u #d
100 1 $aLOURENÇO JR, J.
245 $aSoil-associated drivers of plant traits and functional composition in Atlantic Forest coastal tree communities.$h[electronic resource]
260 $c2021
520 $aThe severe deforestation of Brazil?s Atlantic Forest and the increasing effects of climate change underscore the need to understand how tree species respond to climate and edaphic factors. To identify the most important environmental drivers of coastal Atlantic Forest diversity and functional composition, we studied 42 plots of coastal Atlantic Forest (restinga), which has a high diversity of plant communities and spans strong environmental gradients. We examined how forest physiognomy and functional composition respond to changes in the environment, hydraulic, and soil properties. We tested different hypotheses relating the roles of nutrients and soil water availability in driving shifts in tropical forest diversity and functioning. We collected wood samples and leaves from ~85% of the plant species identified in the forest inventory and estimated the community-weighted tree height, aboveground biomass, basal area of individual plants, specific leaf area, wood density, and the total tree biomass per community by the sum of all trees? aboveground biomass per plot. We measured water table depth and 24 physicochemical soil parameters. Hypotheses relating to these factors were formalized via both generalized additive models and piecewise structural equation models and null models of community assembly. Increasing drought, as reflected by increasing water table depth, coarse sand, and soil concentration of aluminum (>6 cmol/kg), was found to be a primary driver of shifts in all measured functional traits. Water table depth was found to be the main environmental driver of restinga species diversity, but shifts in species richness were largely decoupled from functional richness and functional dispersion. Our results suggest that decreases in soil water availability are a central driver of local phenotype?environment matching and that increasing water limitation increases the role of environmental filtering on multiple traits. Our results show that drought leads to a strong convergence (standardized effect size < 1.95) in forest function and leads to shifts to smaller statured forest in particular. These findings reveal important differences in the drivers of forest structure and functioning, suggesting that changes in local spatial variation in soil and moisture variables will be a central issue in restinga management and conservation.
650 $aAluminum
650 $aBiodiversity
650 $aBrazil
650 $aSalinity
650 $aRestinga
653 $aAtlantic Forest
653 $aBoveground biomass
653 $aFunctional traits
653 $aPhysiognomy
700 1 $aNEWMAN, E. A.
700 1 $aVENTURA, J. A.
700 1 $aMILANEZ, C. R. D.
700 1 $aTHOMAZ, L. D.
700 1 $aWANDEKOKEN, D.T.
700 1 $aENQUIST, B. J.
773 $tEcosphere$gv. 12, n. 7, e03629, 2021.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Biblioteca Rui Tendinha (BRT) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
| Expressão de busca inválida. Verifique!!! |
|
|
