Ciência Rural (Nov 2009)
Temperatura, umidade relativa e atraso na instalação da atmosfera controlada no armazenamento de maçã 'Fuji' Temperature, relative humidity and delay in installation of controlled atmosphere storage of the 'Fuji' apple
Abstract
O objetivo deste trabalho foi avaliar o atraso na instalação da atmosfera controlada, da exposição à temperatura mais elevada (3°C) e do uso de baixa umidade relativa no início do armazenamento sobre a qualidade da maçã da cultivar 'Fuji'. O delineamento experimental utilizado foi o inteiramente casualizado, com 10 tratamentos e quatro repetições. Os tratamentos avaliados consistiram de combinações de retardo na instalação da AC, por meio do AR, uso da alta temperatura (3°C) e baixa umidade relativa (85%), por um período de um mês e posterior armazenamento em AC, com 1,0kPa de O2 + The aim of this research was to evaluate the delay in installation of a controlled atmosphere, exposure to highe temperature (3°C) at the beginning of the storage period and use of low humidity also at the beginning of storage on the quality of apple 'Fuji'. The experimental design was a completely randomized with ten treatments and four replicates. The treatments evaluated were combinations of delay in installation of the CA, through RH, high temperature (3°C) usage and low humidity (85%) for a period of one month and later storage with AC 1.0kPa of O2 + <0.5kPa of CO2 in temperature of -0.5°C (RH 96%), use of AC in two temperatures (0.5 and -0.5°C), and also by exposure to high CO2 in the initial period of storage. The results showed that the use of low humidity associated or not to the temperature of 3°C in the first month of storage reduced the incidence of breakdown, decay and maintained the firmness of flesh. The temperature of -0.5°C is effective in reducing the incidence of breakdown, decay and maintenance of firmness when compared to the temperature of 0.5°C. The delay of the controlled installation atmosphere combined with a temperature of 3°C in the initial period of storage is not recommended because it causes high incidence of decay and low pulp firmness. The high partial pressure of CO2 or low O2 partial pressure of relevant causes incidence of breakdown.
