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Registro Completo |
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Biblioteca(s): |
Embrapa Soja. |
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Data corrente: |
20/04/1993 |
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Data da última atualização: |
17/08/2004 |
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Autoria: |
BLAMEY, F. P. C.; EDWARDS, D. G.; ASHER, C. J.; KIM, M. |
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Título: |
Response of sunflower to low pH. |
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Ano de publicação: |
1982 |
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Fonte/Imprenta: |
In: INTERNATIONAL PLANT NUTRITION COLLOQUIUM, 9., 1982, Warwick. Plant nutrition 1982: proceedings. Farnham Royal: CAB, 1982. |
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Volume: |
v.1 |
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Páginas: |
p.66-71. |
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Idioma: |
Inglês |
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Conteúdo: |
Traditionally sunflower has been grown on fertile, often alkaline soils. Relatively little is known about the performance of this crop under acid soil conditions. Four sunflower cultivars (Hysun 11, Hysun 21, Hysun 31 and Hysun 32) were grown for three weeks at constant pH values (3.5, 4.0, 4.5, 5.0, 5.5, 6.0 and 6.5) in flowing solution culture with controlled nutrient concentrations. A solution pH of 3.5 was lethal to all cultivars but cultivars differed in response to increasing pH at values 4.0 and above. Top dry matter yields were not significantly increased above pH 4.0 for Hysun 11, 4.5 for Hysun 32, or 5.0 for Hysun 21 and Hysun 31. At these pH values, relative growth rates of tops on a dry matter basis were 13.0, 14.7, 15.2, and 16.5 g/100g/day respectively for Hysun 11, Hysun 21, Hysun 31, and Hysun 32. Cultivar root yields varied in response to increasing pH above 3.5 with Hysun 21 showing the greatest and Hysun 11 showing the least response to increasing pH. Increased solution pH increased the concentrations of P, Ca, and Mn, reduced the concentrations of N, K, and Fe, and had no effect on the concentration of Mg in plant tissues. Similar effects of solution pH were observed on mean nutrient uptake rates. There were no significant differences between cultivars in concentrations of any elements studied in plant tops, youngest fully expanded leaf, or roots. |
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Palavras-Chave: |
Alkaline; Sunflower. |
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Thesagro: |
Acidez; Girassol; Solo Alcalino. |
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Thesaurus Nal: |
acidity; soil. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02080naa a2200265 a 4500
001 1451529
005 2004-08-17
008 1982 bl uuuu u00u1 u #d
100 1 $aBLAMEY, F. P. C.
245 $aResponse of sunflower to low pH.
260 $c1982
300 $ap.66-71. v.1
490 $vv.1
520 $aTraditionally sunflower has been grown on fertile, often alkaline soils. Relatively little is known about the performance of this crop under acid soil conditions. Four sunflower cultivars (Hysun 11, Hysun 21, Hysun 31 and Hysun 32) were grown for three weeks at constant pH values (3.5, 4.0, 4.5, 5.0, 5.5, 6.0 and 6.5) in flowing solution culture with controlled nutrient concentrations. A solution pH of 3.5 was lethal to all cultivars but cultivars differed in response to increasing pH at values 4.0 and above. Top dry matter yields were not significantly increased above pH 4.0 for Hysun 11, 4.5 for Hysun 32, or 5.0 for Hysun 21 and Hysun 31. At these pH values, relative growth rates of tops on a dry matter basis were 13.0, 14.7, 15.2, and 16.5 g/100g/day respectively for Hysun 11, Hysun 21, Hysun 31, and Hysun 32. Cultivar root yields varied in response to increasing pH above 3.5 with Hysun 21 showing the greatest and Hysun 11 showing the least response to increasing pH. Increased solution pH increased the concentrations of P, Ca, and Mn, reduced the concentrations of N, K, and Fe, and had no effect on the concentration of Mg in plant tissues. Similar effects of solution pH were observed on mean nutrient uptake rates. There were no significant differences between cultivars in concentrations of any elements studied in plant tops, youngest fully expanded leaf, or roots.
650 $aacidity
650 $asoil
650 $aAcidez
650 $aGirassol
650 $aSolo Alcalino
653 $aAlkaline
653 $aSunflower
700 1 $aEDWARDS, D. G.
700 1 $aASHER, C. J.
700 1 $aKIM, M.
773 $tIn: INTERNATIONAL PLANT NUTRITION COLLOQUIUM, 9., 1982, Warwick. Plant nutrition 1982: proceedings. Farnham Royal: CAB, 1982.
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Embrapa Soja (CNPSO) |
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