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Registro Completo |
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Biblioteca(s): |
Biblioteca Rui Tendinha. |
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Data corrente: |
28/08/2014 |
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Data da última atualização: |
28/08/2014 |
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Autoria: |
COMPETITIVE GRANTS IN THE NEW MILLENNIUM : A GLOBAL WORKSHOP FOR DESIGNERS AND PRACTITIONERS, 2000, Brasília, DF. |
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Título: |
Proceedings... |
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Ano de publicação: |
2000 |
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Fonte/Imprenta: |
Brasília, DF : Brazilian Ministry of Agriculture and Food Supply; Embrapa, IDB : The World Bank, 2000. |
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Páginas: |
271 p. |
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Idioma: |
Português |
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Notas: |
Organizado por : Francisco José Becker Reifschneider, Derek R. Byerlee, Francisco Basílio de Souza. |
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Conteúdo: |
African Countries: Financing agricultural Research in Africa: the sustainable financing initiative; Bangladesh: Contract research scheme - an experience of competitive research funding; Brazil: Embrapa's competitive grants scheme (PRODETAB); Colombia: The agricultural tecnology development project; Croatia: Croatian National Agricultural Research System; Ecuador: The competitive agricultural research fund in Ecuador; Ghana: Preparation towards the implementation of a competitive agricultural research grant scheme in Ghana; Nepal: The Hill research programme of the Hill agriculture research project - A working model of a competitive grant fund; Nicaragua: The competitive agricultural technology fund in Nicaragua; United States of America: competitive grants fo U.S agricultural research the long and hard road to success; Highlights on competitive grants programs; Competitive grants programs: the case of PRODETAB in Brazil; Characteristics of successful agricultural research competitive grants programs; Some experiences from financing competitive funds for agricultural research in Latin America; Cooperation and competition in competitive grants - Is coopetition being achieved?; Competitive funding of agricultural research in the world bank: lessons and challenges. |
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Palavras-Chave: |
Agricultura; Agricultura sustentavel; Agropecuária; Brasil; Competição econômica; Competitividade; Competitividade por fundos; Congresso; Cooperação; Finança; Financiamento; Fundos para pesquisa; Pesquisa; Pesquisa agrícola; Pesquisa agropecuária; Pesquisa em agricultura; Programa; Programa de Competitividade Agrícola; Projeto de pesquisa; Subsídio; Tecnologia. |
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Thesaurus NAL: |
Agricultural; Agricultural research; Agriculture; Competitive grants; Competitivity; Competive grants; Congress; Cooperation; Economic competition; Finance; Meeting; Proceedings; Research; Research projects; Research support; Subsidies; Sustainability; Technology. |
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Categoria do assunto: |
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Marc: |
LEADER 03067nam a2200601 a 4500
001 1004034
005 2014-08-28
008 2000 bl uuuu u01u1 u #d
100 1 $aCOMPETITIVE GRANTS IN THE NEW MILLENNIUM : A GLOBAL WORKSHOP FOR DESIGNERS AND PRACTITIONERS, 2000, Brasília, DF.
245 $aProceedings...
260 $aBrasília, DF : Brazilian Ministry of Agriculture and Food Supply; Embrapa, IDB : The World Bank$c2000
300 $a271 p.
500 $aOrganizado por : Francisco José Becker Reifschneider, Derek R. Byerlee, Francisco Basílio de Souza.
520 $aAfrican Countries: Financing agricultural Research in Africa: the sustainable financing initiative; Bangladesh: Contract research scheme - an experience of competitive research funding; Brazil: Embrapa's competitive grants scheme (PRODETAB); Colombia: The agricultural tecnology development project; Croatia: Croatian National Agricultural Research System; Ecuador: The competitive agricultural research fund in Ecuador; Ghana: Preparation towards the implementation of a competitive agricultural research grant scheme in Ghana; Nepal: The Hill research programme of the Hill agriculture research project - A working model of a competitive grant fund; Nicaragua: The competitive agricultural technology fund in Nicaragua; United States of America: competitive grants fo U.S agricultural research the long and hard road to success; Highlights on competitive grants programs; Competitive grants programs: the case of PRODETAB in Brazil; Characteristics of successful agricultural research competitive grants programs; Some experiences from financing competitive funds for agricultural research in Latin America; Cooperation and competition in competitive grants - Is coopetition being achieved?; Competitive funding of agricultural research in the world bank: lessons and challenges.
650 $aAgricultural
650 $aAgricultural research
650 $aAgriculture
650 $aCompetitive grants
650 $aCompetitivity
650 $aCompetive grants
650 $aCongress
650 $aCooperation
650 $aEconomic competition
650 $aFinance
650 $aMeeting
650 $aProceedings
650 $aResearch
650 $aResearch projects
650 $aResearch support
650 $aSubsidies
650 $aSustainability
650 $aTechnology
653 $aAgricultura
653 $aAgricultura sustentavel
653 $aAgropecuária
653 $aBrasil
653 $aCompetição econômica
653 $aCompetitividade
653 $aCompetitividade por fundos
653 $aCongresso
653 $aCooperação
653 $aFinança
653 $aFinanciamento
653 $aFundos para pesquisa
653 $aPesquisa
653 $aPesquisa agrícola
653 $aPesquisa agropecuária
653 $aPesquisa em agricultura
653 $aPrograma
653 $aPrograma de Competitividade Agrícola
653 $aProjeto de pesquisa
653 $aSubsídio
653 $aTecnologia
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Registro original: |
Biblioteca Rui Tendinha (BRT) |
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Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
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Registro Completo |
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Biblioteca(s): |
Biblioteca Rui Tendinha. |
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Data corrente: |
15/05/2015 |
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Data da última atualização: |
23/10/2015 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
SOUZA, M. F. de.; SOARES, E. M. B.; SILVA, I. R. da; NOVAIS, R. F.; SILVA, M. F. de O. |
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Afiliação: |
Matheus Fonseca de Souza, Incaper; Emanuelle Mercês Barros Soares; Ivo Ribeiro da Silva; Roberto Ferreira Novais; Mailson Félix de Oliveira Silva. |
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Título: |
Competitive sorption and desorption of phosphate and citrate in clayey and sandy loam soils. |
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Título original: |
Sorção e dessorção competitiva de fósforo e citrato em solos de textura muito argilosa e franco-arenosa. |
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Ano de publicação: |
2014 |
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Fonte/Imprenta: |
Revista Brasileira de Ciência do Solo, Viçosa, v. 38, n. 4, p. 1153-1161, agosto 2014. |
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DOI: |
http://dx.doi.org/10.1590/S0100-06832014000400011 |
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Idioma: |
Inglês |
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Conteúdo: |
The increase of organic acids in soils can reduce phosphorus sorption. The objective of the study was to evaluate the competitive sorption of P and citrate in clayey and sandy loam soils, using a stirred-flow system. Three experiments were performed with soil samples (0-20 cm layer) of clayey (RYL-cl) and sandy loam (RYL-sl) Red Yellow Latosols (Oxisols). In the first study, the treatments were arranged in a 2 × 5 factorial design, with two soil types and five combinations of phosphorus and citrate application (only P; P + citrate; and citrate applied 7, 22, 52 min before P); in the second, the treatments were arranged in a 2 × 2 factorial design, corresponding to two soils and two forms of P and citrate application (only citrate and citrate + P); and in the third study, the treatments in a 2 × 2 × 6 factorial design consisted of two soils, two extractors (citrate and water) and six incubation times. In the RYL-cl and RYL-sl, P sorption was highest (44 and 25 % of P application, respectively), in the absence of citrate application. Under citrate application, P sorption was reduced in all treatments. The combined application of citrate and P reduced P sorption to 25.8 % of the initially applied P in RYL-cl and to 16.7 % in RYL-sl, in comparison to P without citrate. Citrate sorption in RYL-cl and RYL-sl was highest in the absence of P application, corresponding to 32.0 and 30.2 % of the citrate applied, respectively. With P application, citrate sorption was reduced to 26.4 and 19.7 % of the initially applied citrate in RYL-cl and RYL-sl, respectively. Phosphorus desorption was greater when citrate was used. Phosphorus desorption with citrate and water was higher in the beginning (until 24 h of incubation of P) in RYL-cl and RYL-sl, indicating a rapid initial phase, followed by a slow release phase. This suggests that according to the contact time of P with the soil colloids, the previously adsorbed P can be released to the soil solution in the presence of competing ligands such as citrate. In conclusion, a soil management with continuous input of organic acids is desirable, in view of their potential to compete for P sorption sites, especially in rather weathered soils.
O aumento de ácidos orgânicos pode induzir à redução da sorção de P em solos. Este trabalho objetivou avaliar a sorção competitiva de P e citrato em solos de textura muito argilosa e franco-arenosa, utilizando o sistema de fluxo contínuo (stirred-flow). Foram realizados três experimentos com amostras da camada de 0-20 cm de dois Latossolos Vermelho-Amarelo, texturas muito argilosa (LVA_arg) e franco-arenosa (LVA_fa). No primeiro, os tratamentos foram definidos por fatorial 2 × 5, sendo dois solos e cinco configurações de aplicação de P e citrato no solo (apenas P, P + citrato e citrato 7, 22, 52 min antes do P); no segundo, os tratamentos foram determinados por fatorial 2 × 2, dois solos e duas formas de aplicação de P e citrato no solo (apenas citrato, citrato + P); e, no terceiro, os tratamentos foram definidos segundo um fatorial 2 × 2 × 6, sendo dois solos, dois extratores (citrato e água) e os seis períodos de incubação. O valor máximo da sorção de P no LVA_arg e LVA_fa foi observado na testemunha sem aplicação de citrato, correspondendo a 44 e 25 % do P aplicado, respectivamente. Com a aplicação de citrato, a sorção de P foi inferior em todos os tratamentos. A aplicação de citrato junto com P reduziu a sorção do P aplicado para 25,8 % no LVA_arg e 16,7 % no LVA_fa, em relação à aplicação de P sem citrato. O valor máximo da sorção de citrato no LVA_arg e LVA_fa ocorreu no tratamento sem adição de P, correspondendo a 32,0 e 30,2 % do citrato aplicado, respectivamente. Com aplicação de P, a sorção de citrato reduziu para 26,4 e 19,7 % do citrato aplicado no LVA_arg e LVA_fa, respectivamente. A dessorção de P foi maior com a utilização do citrato. A dessorção com citrato e água foi inicialmente superior (até 24 h de incubação de P) no LVA_arg e LVA_fa, caracterizando uma fase inicialmente rápida, seguida de uma fase lenta, sugerindo que, dependendo do tempo de contato do P com os coloides do solo, o P previamente sorvido pode ser liberado para a solução, se ligantes competitivos como o citrato estiverem presente. Assim, o manejo de solo que adiciona de forma continuada ácidos orgânicos, uma vez que esses apresentam o potencial de competir pelos sítios de sorção de P, seria almejado, principalmente em solos mais intemperizados. MenosThe increase of organic acids in soils can reduce phosphorus sorption. The objective of the study was to evaluate the competitive sorption of P and citrate in clayey and sandy loam soils, using a stirred-flow system. Three experiments were performed with soil samples (0-20 cm layer) of clayey (RYL-cl) and sandy loam (RYL-sl) Red Yellow Latosols (Oxisols). In the first study, the treatments were arranged in a 2 × 5 factorial design, with two soil types and five combinations of phosphorus and citrate application (only P; P + citrate; and citrate applied 7, 22, 52 min before P); in the second, the treatments were arranged in a 2 × 2 factorial design, corresponding to two soils and two forms of P and citrate application (only citrate and citrate + P); and in the third study, the treatments in a 2 × 2 × 6 factorial design consisted of two soils, two extractors (citrate and water) and six incubation times. In the RYL-cl and RYL-sl, P sorption was highest (44 and 25 % of P application, respectively), in the absence of citrate application. Under citrate application, P sorption was reduced in all treatments. The combined application of citrate and P reduced P sorption to 25.8 % of the initially applied P in RYL-cl and to 16.7 % in RYL-sl, in comparison to P without citrate. Citrate sorption in RYL-cl and RYL-sl was highest in the absence of P application, corresponding to 32.0 and 30.2 % of the citrate applied, respectively. With P application, citrate sorption was reduced to 26.4 an... Mostrar Tudo |
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Palavras-Chave: |
Ácidos orgânicos; Incubação; Latossolo; Stirred-flow. |
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Thesaurus NAL: |
Incubation time; Latosol; Organic acids; Stirred-flow. |
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Categoria do assunto: |
-- |
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URL: |
http://biblioteca.incaper.es.gov.br/digital/bitstream/item/763/1/matheusfonseca.pdf
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Marc: |
LEADER 05541naa a2200289 a 4500
001 1006472
005 2015-10-23
008 2014 bl uuuu u00u1 u #d
024 7 $ahttp://dx.doi.org/10.1590/S0100-06832014000400011$2DOI
100 1 $aSOUZA, M. F. de.
240 $aSorção e dessorção competitiva de fósforo e citrato em solos de textura muito argilosa e franco-arenosa.
245 $aCompetitive sorption and desorption of phosphate and citrate in clayey and sandy loam soils.$h[electronic resource]
260 $c2014
520 $aThe increase of organic acids in soils can reduce phosphorus sorption. The objective of the study was to evaluate the competitive sorption of P and citrate in clayey and sandy loam soils, using a stirred-flow system. Three experiments were performed with soil samples (0-20 cm layer) of clayey (RYL-cl) and sandy loam (RYL-sl) Red Yellow Latosols (Oxisols). In the first study, the treatments were arranged in a 2 × 5 factorial design, with two soil types and five combinations of phosphorus and citrate application (only P; P + citrate; and citrate applied 7, 22, 52 min before P); in the second, the treatments were arranged in a 2 × 2 factorial design, corresponding to two soils and two forms of P and citrate application (only citrate and citrate + P); and in the third study, the treatments in a 2 × 2 × 6 factorial design consisted of two soils, two extractors (citrate and water) and six incubation times. In the RYL-cl and RYL-sl, P sorption was highest (44 and 25 % of P application, respectively), in the absence of citrate application. Under citrate application, P sorption was reduced in all treatments. The combined application of citrate and P reduced P sorption to 25.8 % of the initially applied P in RYL-cl and to 16.7 % in RYL-sl, in comparison to P without citrate. Citrate sorption in RYL-cl and RYL-sl was highest in the absence of P application, corresponding to 32.0 and 30.2 % of the citrate applied, respectively. With P application, citrate sorption was reduced to 26.4 and 19.7 % of the initially applied citrate in RYL-cl and RYL-sl, respectively. Phosphorus desorption was greater when citrate was used. Phosphorus desorption with citrate and water was higher in the beginning (until 24 h of incubation of P) in RYL-cl and RYL-sl, indicating a rapid initial phase, followed by a slow release phase. This suggests that according to the contact time of P with the soil colloids, the previously adsorbed P can be released to the soil solution in the presence of competing ligands such as citrate. In conclusion, a soil management with continuous input of organic acids is desirable, in view of their potential to compete for P sorption sites, especially in rather weathered soils. O aumento de ácidos orgânicos pode induzir à redução da sorção de P em solos. Este trabalho objetivou avaliar a sorção competitiva de P e citrato em solos de textura muito argilosa e franco-arenosa, utilizando o sistema de fluxo contínuo (stirred-flow). Foram realizados três experimentos com amostras da camada de 0-20 cm de dois Latossolos Vermelho-Amarelo, texturas muito argilosa (LVA_arg) e franco-arenosa (LVA_fa). No primeiro, os tratamentos foram definidos por fatorial 2 × 5, sendo dois solos e cinco configurações de aplicação de P e citrato no solo (apenas P, P + citrato e citrato 7, 22, 52 min antes do P); no segundo, os tratamentos foram determinados por fatorial 2 × 2, dois solos e duas formas de aplicação de P e citrato no solo (apenas citrato, citrato + P); e, no terceiro, os tratamentos foram definidos segundo um fatorial 2 × 2 × 6, sendo dois solos, dois extratores (citrato e água) e os seis períodos de incubação. O valor máximo da sorção de P no LVA_arg e LVA_fa foi observado na testemunha sem aplicação de citrato, correspondendo a 44 e 25 % do P aplicado, respectivamente. Com a aplicação de citrato, a sorção de P foi inferior em todos os tratamentos. A aplicação de citrato junto com P reduziu a sorção do P aplicado para 25,8 % no LVA_arg e 16,7 % no LVA_fa, em relação à aplicação de P sem citrato. O valor máximo da sorção de citrato no LVA_arg e LVA_fa ocorreu no tratamento sem adição de P, correspondendo a 32,0 e 30,2 % do citrato aplicado, respectivamente. Com aplicação de P, a sorção de citrato reduziu para 26,4 e 19,7 % do citrato aplicado no LVA_arg e LVA_fa, respectivamente. A dessorção de P foi maior com a utilização do citrato. A dessorção com citrato e água foi inicialmente superior (até 24 h de incubação de P) no LVA_arg e LVA_fa, caracterizando uma fase inicialmente rápida, seguida de uma fase lenta, sugerindo que, dependendo do tempo de contato do P com os coloides do solo, o P previamente sorvido pode ser liberado para a solução, se ligantes competitivos como o citrato estiverem presente. Assim, o manejo de solo que adiciona de forma continuada ácidos orgânicos, uma vez que esses apresentam o potencial de competir pelos sítios de sorção de P, seria almejado, principalmente em solos mais intemperizados.
650 $aIncubation time
650 $aLatosol
650 $aOrganic acids
650 $aStirred-flow
653 $aÁcidos orgânicos
653 $aIncubação
653 $aLatossolo
653 $aStirred-flow
700 1 $aSOARES, E. M. B.
700 1 $aSILVA, I. R. da
700 1 $aNOVAIS, R. F.
700 1 $aSILVA, M. F. de O.
773 $tRevista Brasileira de Ciência do Solo, Viçosa$gv. 38, n. 4, p. 1153-1161, agosto 2014.
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