| |
|
|
 | Acesso ao texto completo restrito à biblioteca da Epagri-Sede. Para informações adicionais entre em contato com biblio@epagri.sc.gov.br. |
|
Registro Completo |
|
Biblioteca(s): |
Epagri-Sede. |
|
Data corrente: |
29/08/2002 |
|
Data da última atualização: |
29/08/2002 |
|
Autoria: |
CORDEIRO, A.C.C. |
|
Título: |
Produtividade de graos de cultivares recomendadas e de linhagens promissoras de arroz de terras altas para Roraima no periodo 1997 a 2001. |
|
Ano de publicação: |
2002 |
|
Fonte/Imprenta: |
In: CONGRESSO DA CADEIA PRODUTIVA DE ARROZ, 1.; REUNIAO NACIONAL DE PESQUISA DE ARROZ-RENAPA, 7., 2002, Florianopolis, SC. Anais... Santo Antonio de Goias: Embrapa Arroz e Feijao, 2002. |
|
Páginas: |
p.192-193. |
|
Idioma: |
Português |
|
Palavras-Chave: |
Arroz de terras altas; Genotipo; Melhoramento genetico. |
|
Categoria do assunto: |
-- |
|
Marc: |
LEADER 00661naa a2200157 a 4500
001 1022490
005 2002-08-29
008 2002 bl uuuu u00u1 u #d
100 1 $aCORDEIRO, A.C.C.
245 $aProdutividade de graos de cultivares recomendadas e de linhagens promissoras de arroz de terras altas para Roraima no periodo 1997 a 2001.
260 $c2002
300 $ap.192-193.
653 $aArroz de terras altas
653 $aGenotipo
653 $aMelhoramento genetico
773 $tIn: CONGRESSO DA CADEIA PRODUTIVA DE ARROZ, 1.; REUNIAO NACIONAL DE PESQUISA DE ARROZ-RENAPA, 7., 2002, Florianopolis, SC. Anais... Santo Antonio de Goias: Embrapa Arroz e Feijao, 2002.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Epagri-Sede (Epagri-Sede) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
|
Voltar
|
|
|
Registro Completo
|
Biblioteca(s): |
Epagri-Sede. |
|
Data corrente: |
23/08/2013 |
|
Data da última atualização: |
23/08/2013 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Circulação/Nível: |
Internacional - B |
|
Autoria: |
TENBERG, A.; VEIGA, M.; DECHEN, S. C. F.; STOCKING, M. A. |
|
Título: |
Modelling the impact of erosion on soil productivity: a comparative evaluation of approaches on data from southern Brazil. |
|
Ano de publicação: |
1998 |
|
Fonte/Imprenta: |
Experimental Agriculture, Cambridge, v. 34, p. 55-71, 1998. |
|
Idioma: |
Português |
|
Conteúdo: |
Erosion changes soil properties, removes nutrients and alters crop yields. A knowledge of these impacts on soil productivity is needed for economic analyses of erosion and conservation. Based on a United Nations Food and Agriculture Organization experimental design to monitor these changes, results are reported from four research sites in southern Brazil on Ferralsols and Cambisols, enabling the construction of erosion?yield?time and nutrient loss relationships. Plot experiments ran for up to seven years of natural erosion, followed by one or two years of maize cropping. A remarkably consistent composite erosion?yield relationship in logarithmic form was found, showing a sharp yield decline with initial soil loss. Soil ?resilience? was identified through erosion?time relationships, ?sensitivity? through erosion?yield equations. As erosion progressed, losses of nutrients, especially of organic carbon and calcium, were significant. In situ changes in soil properties were far less marked. Together with measured yield reductions caused by cumulative erosion, these results enabled the modelling of changes in soil productivity over time with respect to both soil quality and impact on yields. A production ?half-life? of between one and 39 years according to soil type and level of erosion was also identified. |
|
Palavras-Chave: |
Cambisol; Ferralsol; Soil resilience. |
|
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
|
|
|
|
Marc: |
LEADER 01922naa a2200193 a 4500
001 1118895
005 2013-08-23
008 1998 bl uuuu u00u1 u #d
100 1 $aTENBERG, A.
245 $aModelling the impact of erosion on soil productivity$ba comparative evaluation of approaches on data from southern Brazil.$h[electronic resource]
260 $c1998
520 $aErosion changes soil properties, removes nutrients and alters crop yields. A knowledge of these impacts on soil productivity is needed for economic analyses of erosion and conservation. Based on a United Nations Food and Agriculture Organization experimental design to monitor these changes, results are reported from four research sites in southern Brazil on Ferralsols and Cambisols, enabling the construction of erosion?yield?time and nutrient loss relationships. Plot experiments ran for up to seven years of natural erosion, followed by one or two years of maize cropping. A remarkably consistent composite erosion?yield relationship in logarithmic form was found, showing a sharp yield decline with initial soil loss. Soil ?resilience? was identified through erosion?time relationships, ?sensitivity? through erosion?yield equations. As erosion progressed, losses of nutrients, especially of organic carbon and calcium, were significant. In situ changes in soil properties were far less marked. Together with measured yield reductions caused by cumulative erosion, these results enabled the modelling of changes in soil productivity over time with respect to both soil quality and impact on yields. A production ?half-life? of between one and 39 years according to soil type and level of erosion was also identified.
653 $aCambisol
653 $aFerralsol
653 $aSoil resilience
700 1 $aVEIGA, M.
700 1 $aDECHEN, S. C. F.
700 1 $aSTOCKING, M. A.
773 $tExperimental Agriculture, Cambridge$gv. 34, p. 55-71, 1998.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Epagri-Sede (Epagri-Sede) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
| Expressão de busca inválida. Verifique!!! |
|
|
