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Registro Completo |
Biblioteca(s): |
Embrapa Arroz e Feijão; Embrapa Cerrados; Embrapa Trigo. |
Data corrente: |
26/04/1993 |
Data da última atualização: |
20/07/2010 |
Autoria: |
SALINAS, J. G. |
Título: |
Differential response of some cereal and bean cultivars to Al and P stress in an oxisol of Central Brazil. |
Ano de publicação: |
1978 |
Fonte/Imprenta: |
Raleigh: North Carolina State University, 1978. |
Páginas: |
326 p. |
Idioma: |
Inglês Português |
Notas: |
Tese Doutorado. |
Conteúdo: |
A series of eight greenhouse experiments and six field experiments were conducted at the Cerrado Research Center near Brasilia, Brazil, with the purpose of identifying varietal tolerances to Al toxicity and/or low available of P in five important crops (wheat, corn, sorghum, upland rice and beans) as part of a low input strategy to manage savanna Oxisols. A flowing culture solution technique was developed to screen varieties for Al, P, and Al+P stresses in the greenhouse. Stress levels were maintained by adjusting pH, Al and P concentration every 2 days. The main parameters measured were top and root growth rates, root elongation rates, specific absorption and translocation rates of P, Ca, Mg and Al, and percentage translocation of these nutrients to the tops. Most cultivars were tested for Al and/or P stress under field conditions in an Oxisol. Two sorghum hybrids were also field tested more intensively for Al tolerance at several lime rates. The existence of differential tolerance to Al toxicity and/or low available P in culture solutions and field conditions was established among varieties of the crops. With the exception of corn, tolerant varieties to Al stress were also tolerant to P stress, and those sensitive to one factor were also sensitive to the other. In the absence of stress conditions, the variability in growth and nutrition was less marked among species and varieties within species. Brazilian wheat varieties were more tolerant to Al and/or P stress than the Mexican varieties. This was related to the soil properties of locations where they were bred. Inbred corn lines did not exhibit parallel tolerance to the two factors. Breeding appears necessary to obtain tolerance to Al+ P stress. Among the corn hybrids and varieties Cargill-111 was most tolerant to P stress and to Al + P stress, but less marked differences under Al stress condition were observed among these genotypes. The sorghum hybrid, Taylor Evans y-101, was the most tolerant to the mentioned stress factors. When tested together with RS-610, the Al tolerance of Taylor Evans y-101 was associated with better root proliferation than RS 610 which permitted a more effective use of subsoil water. Pratão Precoce, followed by IAC-1246 and IAC-47 were the most tolerant rice varieties while Flotante and Batatais were the least tolerant. Finally, Carioca-1030, Ricopardo-896 and Costa Rica-1031 were the most tolerant bean varieties to Al+P stress. Sensitive parameters to measure differential Al tolerance were root RGR and RER of roots. With certain exceptions, top RGR and root RER were the most sensitive parameters under P stress, while under Al + P stresses both top and root growth rates were important. Species and varieties tolerant to Al stress and/or P stress maintained a more favorable P, Ca and Mg absorption and translocation rates than sensitive varieties. Effect of Al stress on Ca and Mg uptake was to decrease the specific absorption and translocation rates but generally not the percentage translocation. Most of the Al was retained in the roots with a small percent transported to the tops. Under both greenhouse and field conditions the ranking of varieties was similar. Consequently, screening in culture solutions for 10 days predicts ranking of varieties in the field in terms of grainin yields. The advantage of the greenhouse tests is to reduce time and space requirements. This study show the potential for utilizing tolerant cultivars as an important component of managing savanna Oxisols. MenosA series of eight greenhouse experiments and six field experiments were conducted at the Cerrado Research Center near Brasilia, Brazil, with the purpose of identifying varietal tolerances to Al toxicity and/or low available of P in five important crops (wheat, corn, sorghum, upland rice and beans) as part of a low input strategy to manage savanna Oxisols. A flowing culture solution technique was developed to screen varieties for Al, P, and Al+P stresses in the greenhouse. Stress levels were maintained by adjusting pH, Al and P concentration every 2 days. The main parameters measured were top and root growth rates, root elongation rates, specific absorption and translocation rates of P, Ca, Mg and Al, and percentage translocation of these nutrients to the tops. Most cultivars were tested for Al and/or P stress under field conditions in an Oxisol. Two sorghum hybrids were also field tested more intensively for Al tolerance at several lime rates. The existence of differential tolerance to Al toxicity and/or low available P in culture solutions and field conditions was established among varieties of the crops. With the exception of corn, tolerant varieties to Al stress were also tolerant to P stress, and those sensitive to one factor were also sensitive to the other. In the absence of stress conditions, the variability in growth and nutrition was less marked among species and varieties within species. Brazilian wheat varieties were more tolerant to Al and/or P stress than the Me... Mostrar Tudo |
Palavras-Chave: |
Aluminium; Arroz de terras altas; Bean; Brasil; Maize; Regiao Central; Sorghum; Tolerância; Upland rice; Wheats. |
Thesagro: |
Alumínio; Arroz; Cerrado; Deficiência; Feijão; Fósforo; Milho; Oryza Sativa; Oxisol; Phaseolus Vulgaris; Sorgo; Trigo; Triticum Aestivum; Zea Mays. |
Thesaurus Nal: |
beans; Brazil; Ferralsols; phosphorus. |
Categoria do assunto: |
-- |
Marc: |
LEADER 04657nam a2200469 a 4500 001 1192170 005 2010-07-20 008 1978 bl uuuu m 00u1 u #d 100 1 $aSALINAS, J. G. 245 $aDifferential response of some cereal and bean cultivars to Al and P stress in an oxisol of Central Brazil. 260 $aRaleigh: North Carolina State University$c1978 300 $a326 p. 500 $aTese Doutorado. 520 $aA series of eight greenhouse experiments and six field experiments were conducted at the Cerrado Research Center near Brasilia, Brazil, with the purpose of identifying varietal tolerances to Al toxicity and/or low available of P in five important crops (wheat, corn, sorghum, upland rice and beans) as part of a low input strategy to manage savanna Oxisols. A flowing culture solution technique was developed to screen varieties for Al, P, and Al+P stresses in the greenhouse. Stress levels were maintained by adjusting pH, Al and P concentration every 2 days. The main parameters measured were top and root growth rates, root elongation rates, specific absorption and translocation rates of P, Ca, Mg and Al, and percentage translocation of these nutrients to the tops. Most cultivars were tested for Al and/or P stress under field conditions in an Oxisol. Two sorghum hybrids were also field tested more intensively for Al tolerance at several lime rates. The existence of differential tolerance to Al toxicity and/or low available P in culture solutions and field conditions was established among varieties of the crops. With the exception of corn, tolerant varieties to Al stress were also tolerant to P stress, and those sensitive to one factor were also sensitive to the other. In the absence of stress conditions, the variability in growth and nutrition was less marked among species and varieties within species. Brazilian wheat varieties were more tolerant to Al and/or P stress than the Mexican varieties. This was related to the soil properties of locations where they were bred. Inbred corn lines did not exhibit parallel tolerance to the two factors. Breeding appears necessary to obtain tolerance to Al+ P stress. Among the corn hybrids and varieties Cargill-111 was most tolerant to P stress and to Al + P stress, but less marked differences under Al stress condition were observed among these genotypes. The sorghum hybrid, Taylor Evans y-101, was the most tolerant to the mentioned stress factors. When tested together with RS-610, the Al tolerance of Taylor Evans y-101 was associated with better root proliferation than RS 610 which permitted a more effective use of subsoil water. Pratão Precoce, followed by IAC-1246 and IAC-47 were the most tolerant rice varieties while Flotante and Batatais were the least tolerant. Finally, Carioca-1030, Ricopardo-896 and Costa Rica-1031 were the most tolerant bean varieties to Al+P stress. Sensitive parameters to measure differential Al tolerance were root RGR and RER of roots. With certain exceptions, top RGR and root RER were the most sensitive parameters under P stress, while under Al + P stresses both top and root growth rates were important. Species and varieties tolerant to Al stress and/or P stress maintained a more favorable P, Ca and Mg absorption and translocation rates than sensitive varieties. Effect of Al stress on Ca and Mg uptake was to decrease the specific absorption and translocation rates but generally not the percentage translocation. Most of the Al was retained in the roots with a small percent transported to the tops. Under both greenhouse and field conditions the ranking of varieties was similar. Consequently, screening in culture solutions for 10 days predicts ranking of varieties in the field in terms of grainin yields. The advantage of the greenhouse tests is to reduce time and space requirements. This study show the potential for utilizing tolerant cultivars as an important component of managing savanna Oxisols. 650 $abeans 650 $aBrazil 650 $aFerralsols 650 $aphosphorus 650 $aAlumínio 650 $aArroz 650 $aCerrado 650 $aDeficiência 650 $aFeijão 650 $aFósforo 650 $aMilho 650 $aOryza Sativa 650 $aOxisol 650 $aPhaseolus Vulgaris 650 $aSorgo 650 $aTrigo 650 $aTriticum Aestivum 650 $aZea Mays 653 $aAluminium 653 $aArroz de terras altas 653 $aBean 653 $aBrasil 653 $aMaize 653 $aRegiao Central 653 $aSorghum 653 $aTolerância 653 $aUpland rice 653 $aWheats
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Embrapa Arroz e Feijão (CNPAF) |
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![](/consulta/web/img/deny.png) | Acesso ao texto completo restrito à biblioteca da Embrapa Arroz e Feijão. Para informações adicionais entre em contato com cnpaf.biblioteca@embrapa.br. |
Registro Completo
Biblioteca(s): |
Embrapa Arroz e Feijão. |
Data corrente: |
09/03/2005 |
Data da última atualização: |
09/03/2005 |
Autoria: |
FRANCO, D. F.; MAGALHÃES, A. M. de; TERRES, A. L.; VERNETTI JÚNIOR, F. J.; RANGEL, P. H.; PINHEIRO, B.; CUTRIM, V.; MOURA NETO, F. P. |
Título: |
Ensaio estadual de valor de cultivo e uso de linhagens promissoras de arroz irrigado da Embrapa-Clima Temperado, Rio Grande do Sul, safra 2001/2001. |
Ano de publicação: |
2001 |
Fonte/Imprenta: |
In: CONGRESSO BRASILEIRO DE ARROZ IRRIGADO, 2.; REUNIÃO DA CULTURA DO ARROZ IRRIGADO, 24., 2001, Porto Alegre. Anais... Porto Alegre: IRGA, 2001. |
Páginas: |
p. 69-71. |
Idioma: |
Português |
Conteúdo: |
Nas regiões onde foram conduzidos os experimentos não verificou-se a ocorrência severa de doenças. Também não ocorreu, em grau significativo, esterilidade de plantas, ocasionada por quedas de temperaturas no período de floração. |
Palavras-Chave: |
Cultivo; Irrigado. |
Thesagro: |
Arroz; Linhagem; Oryza Sativa. |
Categoria do assunto: |
-- |
Marc: |
LEADER 01133naa a2200277 a 4500 001 1213019 005 2005-03-09 008 2001 bl uuuu u00u1 u #d 100 1 $aFRANCO, D. F. 245 $aEnsaio estadual de valor de cultivo e uso de linhagens promissoras de arroz irrigado da Embrapa-Clima Temperado, Rio Grande do Sul, safra 2001/2001. 260 $c2001 300 $ap. 69-71. 520 $aNas regiões onde foram conduzidos os experimentos não verificou-se a ocorrência severa de doenças. Também não ocorreu, em grau significativo, esterilidade de plantas, ocasionada por quedas de temperaturas no período de floração. 650 $aArroz 650 $aLinhagem 650 $aOryza Sativa 653 $aCultivo 653 $aIrrigado 700 1 $aMAGALHÃES, A. M. de 700 1 $aTERRES, A. L. 700 1 $aVERNETTI JÚNIOR, F. J. 700 1 $aRANGEL, P. H. 700 1 $aPINHEIRO, B. 700 1 $aCUTRIM, V. 700 1 $aMOURA NETO, F. P. 773 $tIn: CONGRESSO BRASILEIRO DE ARROZ IRRIGADO, 2.; REUNIÃO DA CULTURA DO ARROZ IRRIGADO, 24., 2001, Porto Alegre. Anais... Porto Alegre: IRGA, 2001.
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