Crescimento da planta, produção e qualidade de frutos de melões amarelo e charentais cultivados sob diferentes malhas

• Ano de defesa: 2006
• Autor(a) principal: Pereira, Francisco Hevilasio Freire
• Orientador(a): Puiatti, Mário
• Banca de defesa: Finger, Fernando Luiz , Cecon, Paulo Roberto , Grossi, José Antônio Saraiva , Sediyama, Maria Aparecida Nogueira
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Viçosa
• Programa de Pós-Graduação: Doutorado em Fitotecnia
• Departamento: Plantas daninhas, Alelopatia, Herbicidas e Resíduos; Fisiologia de culturas; Manejo pós-colheita de
• País: BR
• Palavras-chave em Português: Cucumis melo; Crescimento; Produção; Qualidade; Cultivos de cobertura; Radiação solar
• Palavras-chave em Inglês: Cucumis melo; Growth; Production; Quality; Shaded cultivation; Solar radiation
• Área do conhecimento CNPq: CNPQ::CIENCIAS AGRARIAS::AGRONOMIA::FITOTECNIA
• Link de acesso: http://locus.ufv.br/handle/123456789/1080

The solar radiation is the primary source of responsible energy for the maintenance of the photosynthetic process, though exist evidences that the same when in excess it can harm the plant growth and productivity of the cultures and, in the melon plant, also the quality of the fruits. Being like this, it was aimed at to evaluate the plant growth, yield and fruit quality of melons, Yellow ('Gold Mine') and Charentais ('Fleuron') types, cultivated under screens. The experiment was carried out in the Universidade Federal de Viçosa, throughout 11/24/2003 to 03/11/2004. The treatments, for both the hybrids, were constituted of four cultivation environments: Control (full sun) and under Aluminet® 30%-O, Cromatinet® 30%-O and Sombrite® 30% screens, with reductions in the photosynthetic active solar radiation (PAR) of 30,8%, 35,9% and 32,0%, respectively. The experiment was disposed in completely randomized design, with four replicates. The evaluated characteristics to each 14 days utilized split plot scheme with the environments allocated in the plot and days after the transplant in the split plot. The evaluated characteristics during the conduction of the experiment were: plant height; number and internodes length; area and number of leaves for plant; dry weight of leaves, stem, roots, fruit and total. The evaluated characteristics in the final of the cycle were: total and commercial yield of fruits; medium mass, number for plant, density, format ratio (length/width), pericarp thickness, pulp firmness, total soluble solids concentration, titratable acidity and fruit CO2 and ethylene liberation. The cultivation under the screen Aluminet® 30%-O was the treatment that more stood out among the shaded environments in plant growth, assimilate partition, yield and fruit quality of melon. Besides the alterations in the plant provided by the environments, it was verified that the climatic factors registered in each environment and the inherent genetic factors to the hybrid 'Gold Mine' (Inodorus group) and 'Fleuron' (Cantaloupensis group) interfered in the development of the plants and melon fruits. The low daily medium sunstroke (4,47 h) and moderate PAR registered along the experiment contributed to the inexpressive plant growth, yield and fruit quality of melons, mainly, when cultivated under Sombrite® 30% and Cromatinet® 30% screens. The good acting of the melon plant when cultivated under Aluminet® 30%-O screen, with reduction of 30,8% in PAR, open perspectives for cultivation of melons in systems agroforest or in associated cultivations.