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| Araújo,Adelson Paulo; Fernandes,Aurélio Magno; Kubota,Flavio Yuudi; Brasil,Felipe Costa; Teixeira,Marcelo Grandi. |
| Evaluation of root traits may be facilitated if they are assessed on samples of the root system. The objective of this work was to determine the sample size of the root system in order to estimate root traits of common bean (Phaseolus vulgaris L.) cultivars by digital image analysis. One plant was grown per pot and harvested at pod setting, with 64 and 16 pots corresponding to two and four cultivars in the first and second experiments, respectively. Root samples were scanned up to the completeness of the root system and the root area and length were estimated. Scanning a root sample demanded 21 minutes, and scanning the entire root system demanded 4 hours and 53 minutes. In the first experiment, root area and length estimated with two samples showed,... |
| Tipo: Info:eu-repo/semantics/report |
Palavras-chave: Phaseolus vulgaris; Root area; Root length; Sampling. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2004000400003 |
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| Araújo,Adelson Paulo; Kubota,Flavio Yuudi; Teixeira,Marcelo Grandi. |
| Responses of leaf senescence to P supply could constitute adaptive mechanisms for plant growth under P-limiting conditions. The aim of this study was to evaluate the effects of soil P supply on leaf senescence of common bean (Phaseolus vulgaris L.). Eight P levels, ranging from 5 to 640 mg kg-1 P, were applied to pots containing four bean plants of cultivar Carioca in 10 kg of an Oxic Haplustult soil. Attached leaves were counted weekly, abscised leaves were collected every other day, and seeds were harvested at maturity. The number of live leaves increased until 48 days after emergence (DAE) and decreased afterwards, irrespective of applied P levels. At lower applied P levels, the initial increase and the final decrease of leaf number was weak, whereas at... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Growth; Harvest index; Ontogeny; Phaseolus vulgaris. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832007000300010 |
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| Kubota,Flavio Yuudi; Andrade Neto,Antonio Custódio de; Araújo,Adelson Paulo; Teixeira,Marcelo Grandi. |
| Sementes de feijoeiro (Phaseolus vulgaris) com alto teor de molibdênio podem garantir o suprimento adequado desse nutriente para a cultura. Foram realizados dois experimentos em casa de vegetação, com o objetivo de avaliar o efeito de sementes enriquecidas com Mo, obtidas em plantas que receberam adubação foliar, no crescimento e acumulação de N do feijoeiro. O substrato foi horizonte A de Argissolo em vasos de 3,5 kg, que receberam calagem e nutrientes, exceto Mo. O primeiro experimento teve arranjo fatorial 3 x 2 x 2 com cinco repetições: três cultivares de feijoeiro, duas concentrações de Mo na semente e duas épocas de coleta. Plantas originadas de sementes com alto teor de Mo, dos três cultivares, apresentaram maior acumulação de biomassa e N na parte... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Adubação foliar; Genótipo; Nodulação; Phaseolus vulgaris; Semente. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832008000400028 |
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