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103. | | d' OLIVEIRA, M. V. N.; BRAZ, E. M.; OLIVEIRA, L. C.; ARAÚJO, H. J. B. de; WADT, L. H. de O.; SÁ, C. P. de; MIRANDA, E. M.; SILVA, F. de A. C.; SILVA, M. P. da; SILVA, S. P. da; CORREIA, M. F.; CARVALHO, P. R. de; FARIAS, A. do N. Manejo sustentável para pequenas propriedades. Rio Branco: EMBRAPA-CPAF/AC, 1995. 6 p. Biblioteca(s): Embrapa Agrobiologia. |
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Registro Completo
Biblioteca(s): |
Embrapa Milho e Sorgo. |
Data corrente: |
28/12/2004 |
Data da última atualização: |
30/05/2018 |
Tipo da produção científica: |
Capítulo em Livro Técnico-Científico |
Autoria: |
ALVES, V. M. C.; PARENTONI, S. N.; VASCONCELLOS, C. A.; BAHIA FILHO, A. F. C.; PITTA, G. V. E.; SCHAFFERT, R. E. |
Afiliação: |
VERA MARIA CARVALHO ALVES, CNPMS; SIDNEY NETTO PARENTONI, CNPMS; ROBERT EUGENE SCHAFFERT, CNPMS. |
Título: |
Mechanisms of phosphorus efficiency in maize. |
Ano de publicação: |
2001 |
Fonte/Imprenta: |
In: HORST, W.J.; SCHENK, M.K.; BURKERT, A.; CLAASSEN, N.; FLESSA, H.; FROMMER, W.B.; GOLDBACH, H.; OLFS, H.-W.; ROMHELD, V.; SATTELMACHER, B.; SCHMIDHALTER, U.; SCHUBERT, S.; WIREN, N.V.; WITTENMAYER, L. (Ed.). Plant nutrition; food security and sustainability of agro-ecosystems through basic and applied research. Dordrecht: Kluwer Academic Publishers, 2001. p. 566-567. |
Idioma: |
Inglês |
Conteúdo: |
An experiment was conducted on 12 maize hybrids to study the processes involved in screening for P efficiency in nutrient solutions. Four P concentrations (0.3, 0.9, 2.7 and 5.4 mg/litre) were applied to the nutrient solution 20 days after transplanting. In related experiments, the effect of P stress on the morphological and physiological root characteristics were studied. The seed P level and the total dry matter and shoot dry matter were significantly and positively correlated at 0.3, 0.9 and 2.7 mg P/litre. The best treatment to evaluate changes in total root length under P stress was that of 6 days of P omission which significantly increased the root length of 3 of the P efficient hybrids. The omission of P in nutrient solution significantly increased the maximum rate of P absorption of 6 hybrids after 3 days of omission and in 5 genotypes after 6 days of omission. |
Palavras-Chave: |
Maize; Mineral uptake. |
Thesagro: |
Stress. |
Thesaurus NAL: |
hybrids; hydroponics; nutrient solutions; nutrient uptake; phosphorus; roots; seeds; shoots; soilless culture. |
Categoria do assunto: |
-- |
Marc: |
LEADER 02041naa a2200325 a 4500 001 1488600 005 2018-05-30 008 2001 bl uuuu u00u1 u #d 100 1 $aALVES, V. M. C. 245 $aMechanisms of phosphorus efficiency in maize.$h[electronic resource] 260 $c2001 520 $aAn experiment was conducted on 12 maize hybrids to study the processes involved in screening for P efficiency in nutrient solutions. Four P concentrations (0.3, 0.9, 2.7 and 5.4 mg/litre) were applied to the nutrient solution 20 days after transplanting. In related experiments, the effect of P stress on the morphological and physiological root characteristics were studied. The seed P level and the total dry matter and shoot dry matter were significantly and positively correlated at 0.3, 0.9 and 2.7 mg P/litre. The best treatment to evaluate changes in total root length under P stress was that of 6 days of P omission which significantly increased the root length of 3 of the P efficient hybrids. The omission of P in nutrient solution significantly increased the maximum rate of P absorption of 6 hybrids after 3 days of omission and in 5 genotypes after 6 days of omission. 650 $ahybrids 650 $ahydroponics 650 $anutrient solutions 650 $anutrient uptake 650 $aphosphorus 650 $aroots 650 $aseeds 650 $ashoots 650 $asoilless culture 650 $aStress 653 $aMaize 653 $aMineral uptake 700 1 $aPARENTONI, S. N. 700 1 $aVASCONCELLOS, C. A. 700 1 $aBAHIA FILHO, A. F. C. 700 1 $aPITTA, G. V. E. 700 1 $aSCHAFFERT, R. E. 773 $tIn: HORST, W.J.; SCHENK, M.K.; BURKERT, A.; CLAASSEN, N.; FLESSA, H.; FROMMER, W.B.; GOLDBACH, H.; OLFS, H.-W.; ROMHELD, V.; SATTELMACHER, B.; SCHMIDHALTER, U.; SCHUBERT, S.; WIREN, N.V.; WITTENMAYER, L. (Ed.). Plant nutrition; food security and sustainability of agro-ecosystems through basic and applied research. Dordrecht: Kluwer Academic Publishers, 2001. p. 566-567.
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