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Registro Completo |
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Biblioteca(s): |
Epagri-Sede. |
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Data corrente: |
12/09/2005 |
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Data da última atualização: |
12/09/2005 |
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Autoria: |
ALTLAND, J.E.; GILLIAM, C.H.; KEEVER, G.J.; EDWARDS, J.H.; SIBLEY, J.L.; FARE, D.C. |
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Título: |
Rapid Determination of Nitrogen Status in Pansy. |
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Ano de publicação: |
2003 |
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Fonte/Imprenta: |
Hortscience, Alexandria, v.38, n.4, 2003. CD-ROM. |
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Idioma: |
Inglês |
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Conteúdo: |
Two experiments were conducted with pansy (Viola ×wittrockiana Gams ?Bingo Yello?) to determine the relationship between foliar nitrogen (% of dry weight) (FN) and either sap nitrate concentration (SN) in petioles or SPAD readings of foliage. FN was highly correlated to SN throughout both experiments (r = 0.80 to 0.91). FN was poorly correlated to SPAD readings early in both experiments (r = 0.54 to 0.65), but more highly correlated later when visual symptoms of N deficiency were apparent (r = 0.84 to 0.90). SN determined with the Cardy sap nitrate meter was a reliable predictor of FN in pansy, while SPAD readings were only reliable after symptoms of N deficiency were visually evident. FN can be predicted with SN using the following equation: log(SN) = 0.47*FN + 1.6 [r2 = 0.80, n = 132]. Growers and landscape professionals can use SN readings to predict FN levels in pansy, and thus rapidly and accurately diagnose the N status of their crop. |
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Palavras-Chave: |
Amor-perfeito; Cardy nitrate meter; Landscape crops; Nitrate; Nitrogenio; Planta de vaso; Potted plant production; Producao. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01666naa a2200277 a 4500
001 1039480
005 2005-09-12
008 2003 bl uuuu u00u1 u #d
100 1 $aALTLAND, J.E.
245 $aRapid Determination of Nitrogen Status in Pansy.
260 $c2003
520 $aTwo experiments were conducted with pansy (Viola ×wittrockiana Gams ?Bingo Yello?) to determine the relationship between foliar nitrogen (% of dry weight) (FN) and either sap nitrate concentration (SN) in petioles or SPAD readings of foliage. FN was highly correlated to SN throughout both experiments (r = 0.80 to 0.91). FN was poorly correlated to SPAD readings early in both experiments (r = 0.54 to 0.65), but more highly correlated later when visual symptoms of N deficiency were apparent (r = 0.84 to 0.90). SN determined with the Cardy sap nitrate meter was a reliable predictor of FN in pansy, while SPAD readings were only reliable after symptoms of N deficiency were visually evident. FN can be predicted with SN using the following equation: log(SN) = 0.47*FN + 1.6 [r2 = 0.80, n = 132]. Growers and landscape professionals can use SN readings to predict FN levels in pansy, and thus rapidly and accurately diagnose the N status of their crop.
653 $aAmor-perfeito
653 $aCardy nitrate meter
653 $aLandscape crops
653 $aNitrate
653 $aNitrogenio
653 $aPlanta de vaso
653 $aPotted plant production
653 $aProducao
700 1 $aGILLIAM, C.H.
700 1 $aKEEVER, G.J.
700 1 $aEDWARDS, J.H.
700 1 $aSIBLEY, J.L.
700 1 $aFARE, D.C.
773 $tHortscience, Alexandria$gv.38, n.4, 2003. CD-ROM.
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