Conservação pós-colheita de rizomas de taro em função da temperatura de armazenamento e do filme de PVC

• Ano de defesa: 2010
• Autor(a) principal: Zonta, Flávia Miranda Garcia
• Orientador(a): Puiatti, Mário
• Banca de defesa: Fontes, Paulo Cezar Rezende , Moura, Marcelo Amaral de , Chaves, Daniela Vieira
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Viçosa
• Programa de Pós-Graduação: Mestrado em Fitotecnia
• Departamento: Plantas daninhas, Alelopatia, Herbicidas e Resíduos; Fisiologia de culturas; Manejo pós-colheita de
• País: BR
• Palavras-chave em Português: Colocasia esculenta; Pós-colheita; Temperatura; Embalagem
• Palavras-chave em Inglês: Colocasia esculenta; Postharvest; Temperature; Packing
• Área do conhecimento CNPq: CNPQ::CIENCIAS AGRARIAS::AGRONOMIA::FITOTECNIA
• Link de acesso: http://locus.ufv.br/handle/123456789/4525

Taro is a tropical rhizome crop with little information about the ideal condition for storage, contributing the losses observed during the commercialization. The use of plastic films and adequate temperature reduce the losses in many other fresh horticultural crops. This work had the goal to determine the effects of PVC film and temperature of storage on the postharvest of taro rhizomes. Plants of taro cultivar Japonês harvested after nine months of growth and the rhizomes were selected by size and a half placed in polystyrene trays covered with PCV film and the other half as controls. The trays with or without PCV film were stored at 5°C, 12°C and at room temperature for 126 days. The experiment was arranged in a complete random design, with three replicates containing six rhizomes each. At every 21 days it was analyzed the visual appearance, content of dry matter, starch, total soluble sugars (TSS), reducing sugars (RS) and non reducing sugars (NRS). The rhizomes stored at room temperature had acceptable visual quality for only 21 days after harvest with or without PVC film, showing high losses of fresh mass. At temperatures of 5°C and 12°C, the PVC film prolonged the visual quality above 21 days, when compared to those kept in the same temperatures without PVC film, with good quality up to 126 and 84 days, respectively. Although at 5°C, there was reduction of starch and accumulation of TSS, in especial RS. The temperature of 12°C was more effective in maintaining the visual appearance, which was able to inhibit the starch degradation and increase in TSS, being the more appropriated temperature for storage of taro rhizomes.