Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.1/7409
Título: The use of floral analysis to diagnose the nutritional status of orange trees
Autor: Correia, Maribela Pestana
Correia, P. J.
de Varennes, A.
Abadia, J.
Faria, E. A.
Data: 2001
Editora: Taylor & Francis
Resumo: A field experiment was conducted in a commercial orange orchard (Citrus sinensis L. cv. 'Valencia late'), established on a calcareous soil in the south of Portugal, to investigate if flower analysis could be used to diagnose the nutritional status of the trees and predict fruit quality. In April 1996, during full bloom, flowers and leaves were collected from 20 trees. Leaf samples were again collected in June and August from the same trees. In February 1997 the fruits were harvested and their quality evaluated. The concentrations of phosporous (P) and magnesium (Mg) in flowers were correlated with those in leaves, and were also predictive of the chlorophyll content of leaves 60 days later. However, by 120 days after full bloom these effects were masked, possibly by a fertilizer application carried out by the fanner. The iron (Fe) concentration in flowers was correlated with chlorophyll measured either 60 or 120 days after full bloom. These parameters can therefore be used to predict the appearance of iron chlorosis. Fresh weight and diameter of fruit were related to flower P, Mg, and manganese (Mn) concentrations, while the percentage of citric acid in the fruit juice was inversely correlated with Fe flower concentrations.
Peer review: yes
URI: http://hdl.handle.net/10400.1/7409
DOI: https://dx.doi.org/10.1081/PLN-100107603
ISSN: 0190-4167
Aparece nas colecções:FCT2-Artigos (em revistas ou actas indexadas)



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