Influence of pear-factors on weight loss of conference pears.
Verschoor J.A., de Jager A., Schaik A.C.R.
5th International Postharvest Symposium . Volume of Abstract . Verona, Italy 6-11 June 2004, p.69
2004
บทคัดย่อ
Influence of pear-factors on weight loss of conference pears.
The storage disorder “slack necks” is an important factor that limits CA-storage of Conference pears in the Netherlands.The disorder is due to loss of turgor near the pedicel (stem end of the fruit).It is correlated with dehydration.We investigated the biological variation in the rate of transpiration, between and within batches.Pears from 12 orchards, from 3 production areas, were harvested in 2002 and 2003.Harvesting occurred on the date for optimal CA-storage, ad well as 10 days before and after this date.Directly after harvest and after 4 months in CA-storage, weight loss was determined for a 48 h. period at uniform physical conditions (20 °C, 60% RH, airspeed 0.4 m s-1; herein referred to as forced dehydration).Measurements were done on individual pears.Results indicate that harvest date is not a key factor in moisture loss of Conference pears, but fruit weight is.Other observations are: pears from different orchards show a large variation in weight loss under the applied forced dehydration; results after harvest are consistent with those after 4 months of CA-storage; results of the applied forced dehydration are mostly consistent with weight loss during actual storage and shelf-life.The possibility to generate a descriptive model, suitable for prediction of the potential of batches of pears for long term CA-storage will be discussed.