Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.5/627
Título: O ensombramento como técnica de monda na macieira 'Gala' (Malus domestica Borkh.). Caracterização agronómica e ecofisiológica
Outros títulos: Thinning via shading in apple 'Gala' (Malus domestica Borkh.). Agronomic and ecophysiological characterization
Autor: Domingos, Sara Nobre Gonçalves
Orientador: Oliveira, Cristina Maria Moniz Simões
Grappadelli, Luca Corelli
Palavras-chave: apple
malus domestica
thinning
shading
fruit growth
carbon deficit
monda de frutos
ensombramento
deficit de carbono
troca gasosa
Data de Defesa: 2009
Resumo: In this study, carried out in 2007, at the University of Bologna Experimental Farm, a new thinning method via shading in ‘Gala’ apple trees is proposed. The two treatments compared were: chemical thinning (NAA 12 ppm + 6-BA 120ppm, at 14 DAFB) and artificial shading (with a polypropylene 90% shading cloth, at 30 DAFB, for one week). Fruit drop, fruit growth rate via caliper and electronic gauges, and whole tree gas exchange were measured before, during and after shading. Fruit daily growth patterns changed and greatly reduced under shading, as well as net carbon exchange rates, total and per unit of light intercepted by the trees, decreased more than 50% during shading. This work supports the hypothesis that C-deficit may induce fruit abscission around 30 DAFB. The effects of chemical thinning and shading on fruit abscission (58,4±1,98 and 56,3±2,42%), crop load (4,17±0,44 and 4,14±0,27 fruitscm-2TCSA), yield density (0,58±0,06 and 0,60±0,03 Kgcm-2TCSA), final fruit weight and size (164,89±1,97 and 165,37±1,39 g, 73,01±0,26 and 72,33±0,23 mm), were the same. Fruits quality was superior in shading, with higher sugar content, flesh firmness and titrable acidity.
Descrição: Mestrado em Engenharia Agronómica - Hortofruticultura e Viticultura - Instituto Superior de Agronomia
URI: http://hdl.handle.net/10400.5/627
Aparece nas colecções:BISA - Dissertações de Mestrado / Master Thesis

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