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Registro Completo |
Biblioteca(s): |
Embrapa Meio-Norte. |
Data corrente: |
12/05/1998 |
Data da última atualização: |
12/05/1998 |
Autoria: |
SANCHEZ, A.; RIO, A. del; GUZMAN, M.; VALENZUELA, J. L.; LOPEZ-CANTARERO, I.; ROMERO, L. |
Título: |
Ion balance and its evolution in cultivars of melon (Cucumia melo L.) irrigated with brackish water. |
Ano de publicação: |
1992 |
Fonte/Imprenta: |
Comunications in Soil Science and Plant Analysis, v.23, n.17/20, p.2749-2761, 1992. |
Idioma: |
Inglês |
Conteúdo: |
The present study compares ionic balance in 19 mulkmelon cultivars grown under greenhouse conditions with the same system of fertilization-irrigation. Each cultivar was studied in 4 replications distributed in a random block design. In all 20 plants were sampled in each replication of each cultivar every 15 days throughout the reproductive cycle, and analyzed inmediately afterward. Highly significant differences were noted for cations (C+) (Gold-King 304 meq/100g d.w., Canario 183 meq/100 g d.w., anions (A-) (Cantaloupe 387 meq/100 g d.w., Arava 272 meq/100 g d.w.), and cations-anions balance (C+ - A-) (Gold-King -6 meq/100 g d.w., Rocher - 157 meq/100 g d.w., Canario - 163 meq/100 g d.w.), as well as for hydrogen ions (H+) forming capacity (Dorado and Gold-King 88 meq/100 g d.w., Gallicum, Rocher and Canario 0 meq/100 g d.w.). Differences in OH- formation were also notable (Polidor 243 meq/100 g d.w., Makdimon 120 meq/100 g d.w.). Consequently, fruit production among the different cultivars varied widely. The findings suggest that the more complex the mechanism to be quantified is the greater the differences will be between cultivars. A considerable range of variation was found for cations, anions and cations-anions balance. Furthermore, leaf concentration of hydrogen ions and hydroxyl ions is known to be an identifying feature among different cultivars. The changes in foliar concentrations of cations, anions and cations-anions balance with plant age show the same treads in all cultivars, being conditioned by the size of the sink (fruit). The influence of physiological activity varies with leaf cations and anions levels. MenosThe present study compares ionic balance in 19 mulkmelon cultivars grown under greenhouse conditions with the same system of fertilization-irrigation. Each cultivar was studied in 4 replications distributed in a random block design. In all 20 plants were sampled in each replication of each cultivar every 15 days throughout the reproductive cycle, and analyzed inmediately afterward. Highly significant differences were noted for cations (C+) (Gold-King 304 meq/100g d.w., Canario 183 meq/100 g d.w., anions (A-) (Cantaloupe 387 meq/100 g d.w., Arava 272 meq/100 g d.w.), and cations-anions balance (C+ - A-) (Gold-King -6 meq/100 g d.w., Rocher - 157 meq/100 g d.w., Canario - 163 meq/100 g d.w.), as well as for hydrogen ions (H+) forming capacity (Dorado and Gold-King 88 meq/100 g d.w., Gallicum, Rocher and Canario 0 meq/100 g d.w.). Differences in OH- formation were also notable (Polidor 243 meq/100 g d.w., Makdimon 120 meq/100 g d.w.). Consequently, fruit production among the different cultivars varied widely. The findings suggest that the more complex the mechanism to be quantified is the greater the differences will be between cultivars. A considerable range of variation was found for cations, anions and cations-anions balance. Furthermore, leaf concentration of hydrogen ions and hydroxyl ions is known to be an identifying feature among different cultivars. The changes in foliar concentrations of cations, anions and cations-anions balance with plant age show the same treads in... Mostrar Tudo |
Palavras-Chave: |
Cucumia melo; Fertilizacao; Irrigated; Melon. |
Thesagro: |
Íon; Irrigação; Melão. |
Categoria do assunto: |
-- |
Marc: |
LEADER 02384naa a2200265 a 4500 001 1053903 005 1998-05-12 008 1992 bl --- 0-- u #d 100 1 $aSANCHEZ, A. 245 $aIon balance and its evolution in cultivars of melon (Cucumia melo L.) irrigated with brackish water. 260 $c1992 520 $aThe present study compares ionic balance in 19 mulkmelon cultivars grown under greenhouse conditions with the same system of fertilization-irrigation. Each cultivar was studied in 4 replications distributed in a random block design. In all 20 plants were sampled in each replication of each cultivar every 15 days throughout the reproductive cycle, and analyzed inmediately afterward. Highly significant differences were noted for cations (C+) (Gold-King 304 meq/100g d.w., Canario 183 meq/100 g d.w., anions (A-) (Cantaloupe 387 meq/100 g d.w., Arava 272 meq/100 g d.w.), and cations-anions balance (C+ - A-) (Gold-King -6 meq/100 g d.w., Rocher - 157 meq/100 g d.w., Canario - 163 meq/100 g d.w.), as well as for hydrogen ions (H+) forming capacity (Dorado and Gold-King 88 meq/100 g d.w., Gallicum, Rocher and Canario 0 meq/100 g d.w.). Differences in OH- formation were also notable (Polidor 243 meq/100 g d.w., Makdimon 120 meq/100 g d.w.). Consequently, fruit production among the different cultivars varied widely. The findings suggest that the more complex the mechanism to be quantified is the greater the differences will be between cultivars. A considerable range of variation was found for cations, anions and cations-anions balance. Furthermore, leaf concentration of hydrogen ions and hydroxyl ions is known to be an identifying feature among different cultivars. The changes in foliar concentrations of cations, anions and cations-anions balance with plant age show the same treads in all cultivars, being conditioned by the size of the sink (fruit). The influence of physiological activity varies with leaf cations and anions levels. 650 $aÍon 650 $aIrrigação 650 $aMelão 653 $aCucumia melo 653 $aFertilizacao 653 $aIrrigated 653 $aMelon 700 1 $aRIO, A. del 700 1 $aGUZMAN, M. 700 1 $aVALENZUELA, J. L. 700 1 $aLOPEZ-CANTARERO, I. 700 1 $aROMERO, L. 773 $tComunications in Soil Science and Plant Analysis$gv.23, n.17/20, p.2749-2761, 1992.
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Registro Completo
Biblioteca(s): |
Embrapa Solos. |
Data corrente: |
22/11/2002 |
Data da última atualização: |
22/11/2002 |
Autoria: |
SOUZA, J. M. P. F. de; VALLADARES, G. S.; PEREIRA, M. G.; PEREZ, D. V.; ANJOS, L. H. C. dos; ARAUJO, W. S. de. |
Título: |
Uso do extrator Mehlich-3 em solos do Estado do Rio de Janeiro. |
Ano de publicação: |
1997 |
Fonte/Imprenta: |
In: CONGRESSO BRASILEIRO DE CIENCIA DO SOLO, 26., 1997. Rio de Janeiro, RJ. Resumos... Rio de Janeiro: Sociedade Brasileira de Ciencia do Solo, 1997. p.255. |
Idioma: |
Português |
Conteúdo: |
O presente trabalho teve como objetivo comparar a eficiencia do extrator Mehlich 3 com os demais extratores normalmente utilizados na determinacao de nutrientes. Os extratores utilizados foram KCl para determinacao de (Ca e Mg), Mehlich 1 (K, Na e P), e para a determinacao dos micronutrientes (Cu, Zn, Fe e Mn) foram utilizados os extratores DTPA, HCl e Mehlich 1. Foi observada a existencia de correlacao entre os resultados obtidos, utilizando-se o extrator Mehlich-3 e os demais, demonstrando a possibilidade de utilizacao deste na analise de macro e micronutrientes. |
Categoria do assunto: |
-- |
Marc: |
LEADER 01185naa a2200181 a 4500 001 1331474 005 2002-11-22 008 1997 bl uuuu u00u1 u #d 100 1 $aSOUZA, J. M. P. F. de 245 $aUso do extrator Mehlich-3 em solos do Estado do Rio de Janeiro. 260 $c1997 520 $aO presente trabalho teve como objetivo comparar a eficiencia do extrator Mehlich 3 com os demais extratores normalmente utilizados na determinacao de nutrientes. Os extratores utilizados foram KCl para determinacao de (Ca e Mg), Mehlich 1 (K, Na e P), e para a determinacao dos micronutrientes (Cu, Zn, Fe e Mn) foram utilizados os extratores DTPA, HCl e Mehlich 1. Foi observada a existencia de correlacao entre os resultados obtidos, utilizando-se o extrator Mehlich-3 e os demais, demonstrando a possibilidade de utilizacao deste na analise de macro e micronutrientes. 700 1 $aVALLADARES, G. S. 700 1 $aPEREIRA, M. G. 700 1 $aPEREZ, D. V. 700 1 $aANJOS, L. H. C. dos 700 1 $aARAUJO, W. S. de 773 $tIn: CONGRESSO BRASILEIRO DE CIENCIA DO SOLO, 26., 1997. Rio de Janeiro, RJ. Resumos... Rio de Janeiro: Sociedade Brasileira de Ciencia do Solo, 1997. p.255.
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