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Registro Completo |
Biblioteca(s): |
Embrapa Tabuleiros Costeiros. |
Data corrente: |
19/09/1994 |
Data da última atualização: |
19/09/1994 |
Autoria: |
DUNCAN, W. G.; McCLOUD, D. E.; McGRAY, R. L.; BOOTE, K. J. |
Afiliação: |
Dep. of Agronomy, IFAS, Univ. of Florida, Gainesville. |
Título: |
Physiological aspects of peanut yield improvement. |
Ano de publicação: |
1978 |
Fonte/Imprenta: |
Crop Science, v.18, n.6, p.1015-1020, 1978. |
Idioma: |
Inglês |
Conteúdo: |
Development of new peanut (Arachis hypogaea L.) cultivars over the past 40 years has more than doubled yield potential. The purpose of this paper is to identify and evaluate the physiological changes made in the course of this varietal improvement that are responsible for the great increase in yield potential. Weekly harvests of large samples of four Florida cultivars, a Spanish peanut type, and one soybean (Glycine max (L.) Merr.) cultivar gave the information needed to show the progressive changes in dry weights of all plant parts throughoyt the growing season. Other weekly samplings and observations gave numbers of pegs, flowers, and fruits as well as fruit weights, root length, shoot length, and leaf areas. Quantitative estimates of the physiological factors responsible for the dry weight differences were made by computer simulation using the PENUTZ model. Differences in three physiological processes explain most of the yield variation among the five peanut cultivars; the partitioning of assimilate between vegetative and reproductive parts, the length of the filling period, and the rate of fruit establishment. Of these, the partitioning of assimilate had the greatest effect on fruit yield. Estimates of partitioning to fruit ranged from 41% in the first cultivar released to 98% in the most recently released cultivar. Crop growth rates did not differ significantly amont peanut cultivars by all were much higher than the crop growth rate of soybeans. |
Palavras-Chave: |
Groundnut; Improvement; Peanut. |
Thesagro: |
Amendoim; Arachis Hypogaea; Fisiologia. |
Thesaurus Nal: |
physiology. |
Categoria do assunto: |
-- |
Marc: |
LEADER 02072naa a2200241 a 4500 001 1354602 005 1994-09-19 008 1978 bl uuuu u00u1 u #d 100 1 $aDUNCAN, W. G. 245 $aPhysiological aspects of peanut yield improvement. 260 $c1978 520 $aDevelopment of new peanut (Arachis hypogaea L.) cultivars over the past 40 years has more than doubled yield potential. The purpose of this paper is to identify and evaluate the physiological changes made in the course of this varietal improvement that are responsible for the great increase in yield potential. Weekly harvests of large samples of four Florida cultivars, a Spanish peanut type, and one soybean (Glycine max (L.) Merr.) cultivar gave the information needed to show the progressive changes in dry weights of all plant parts throughoyt the growing season. Other weekly samplings and observations gave numbers of pegs, flowers, and fruits as well as fruit weights, root length, shoot length, and leaf areas. Quantitative estimates of the physiological factors responsible for the dry weight differences were made by computer simulation using the PENUTZ model. Differences in three physiological processes explain most of the yield variation among the five peanut cultivars; the partitioning of assimilate between vegetative and reproductive parts, the length of the filling period, and the rate of fruit establishment. Of these, the partitioning of assimilate had the greatest effect on fruit yield. Estimates of partitioning to fruit ranged from 41% in the first cultivar released to 98% in the most recently released cultivar. Crop growth rates did not differ significantly amont peanut cultivars by all were much higher than the crop growth rate of soybeans. 650 $aphysiology 650 $aAmendoim 650 $aArachis Hypogaea 650 $aFisiologia 653 $aGroundnut 653 $aImprovement 653 $aPeanut 700 1 $aMcCLOUD, D. E. 700 1 $aMcGRAY, R. L. 700 1 $aBOOTE, K. J. 773 $tCrop Science$gv.18, n.6, p.1015-1020, 1978.
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Registros recuperados : 14 | |
2. | | BRAZ, E. M.; PASSOS, C. A. M.; CHICHORRO, F.; RIBAS, L. A.; MATTOS, P. P. de; OLIVEIRA, E. B. de; OLIVEIRA, L. C. de; THAINES, F.; OLIVEIRA, M. V. N. d'. Colheita de precisão para o manejo das florestas naturais da Amazônia brasileira. In: SIMPÓSIO BRASILEIRO SOBRE COLHEITA E TRANSPORTE FLORESTAL, 7., 2005, Vitória. [Anais]. [S.l.]: Sociedade de Investigações Florestais, 2005. p. 381-395. 1 CD-ROM.Tipo: Artigo em Anais de Congresso |
Biblioteca(s): Embrapa Acre; Embrapa Florestas. |
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4. | | TSUKAMOTO FILHO, A. de A.; COUTO, L. NEVES, J. C. L.; PASSOS, C. A. M.; MULLER, M. D. Fixação de carbono pelo eucalipto em sistema agrissilvipastoril e monocultivo na região do Cerrado de Minas Gerais. In: CONGRESSO BRASILEIRO DE SISTEMAS AGROFLORESTAIS, 5., 2004, Curitiba. SAFs: desenvolvimento com proteção ambiental: anais. Colombo: Embrapa Florestas, 2004. p. 6-8. (Embrapa Florestas. Documentos, 98).Biblioteca(s): Embrapa Florestas. |
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5. | | BRAZ, E. M.; FIGUEIREDO, E. O.; PASSOS, C. A. M.; MATTOS, P. P. de; OLIVEIRA, M. V. N. d'. Manejo de precisão no norte do Estado do Mato Grosso, Rondônia e Acre. In: REUNIÃO TÉCNICA DO PROJETO: Manejo Florestal e Silvicultura de Precisão no Norte do Estado do Mato Grosso, Rondônia e Acre, 1., 2007, Curitiba. Resumos. Colombo: Embrapa Florestas, 2007. 1 CD-ROM. Resumo 01.Tipo: Resumo em Anais de Congresso |
Biblioteca(s): Embrapa Florestas. |
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14. | | PASSOS, C. A. M.; BRAZ, E. M.; FIGUEIREDO, E. O.; MATTOS, P. P. de; OLIVEIRA, M. V. N. d'. Unidades de gestão em floresta natural na Amazônia meridional. In: REUNIÃO TÉCNICA DO PROJETO: Manejo Florestal e Silvicultura de Precisão no Norte do Estado do Mato Grosso, Rondônia e Acre, 1., 2007, Curitiba. Resumos. Colombo: Embrapa Florestas, 2007. 1CD-ROM. Resumo 09.Tipo: Resumo em Anais de Congresso |
Biblioteca(s): Embrapa Florestas. |
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Registros recuperados : 14 | |
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