RESPIRATION OF APPLES DURING STORAGE AS A FUNCTION OF DIFFERENT ATMOSPHERES AND TEMPERATURES
The respiration behaviour during storage of three common apple varieties "Golden Delicious", "Schöner von Boskoop" and "Gloster 69" was determined in studies lasting several years. The fruit were stored in normal aerial atmosphere and in controlled atmospheres of different composition - 2–5 % CO2 in combination with 1–4 % O2 and the rest N2. The storage temperatures were 1.0°C; 2.5°C and 3.5°C. CO2 production and O2 consumption were measured in the following atmosphere.
These were the most important results:
- The respiration activity of the variety "Golden Delicious" was greater than that of "Boskoop" and substantially greater than that of "Gloster".
- The respiration reduction achievable through CA-conditions was 60 to 70%; it was most distinct in "Golden Delicious", and lowest in "Gloster".
- A decrease of the temperature from 3.5°C to 1°C led primarily in "Golden Delicious" to a distinct reduction of the respiration.
- The respiration quotient fluctuated only insignificantly (1.03 – 1.15) and was not influenced to any noteable degree neither by the different storage atmospheres nor by the different storage temperatures. Even the cold-sensitive variety "Boskoop" showed the usual behaviour at 1°C.
The RQ values were found to remain unchanged also at 20°C during the autumn months, however.
Bohling, H. and Hansen, H. (1983). RESPIRATION OF APPLES DURING STORAGE AS A FUNCTION OF DIFFERENT ATMOSPHERES AND TEMPERATURES. Acta Hortic. 138, 93-106