บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Postharvest physiology and storage technology of stem lettuce (Lactuca sativa var. angustana).

Li Wu; Huang Cheng; Zong RuJing;

Acta Agriculturae Zhejiangensis Year: 1995 Vol: 7 Issue: 2 Pages: 140-143 Ref: 4 ref.

1995

บทคัดย่อ

Postharvest physiology and storage technology of stem lettuce (Lactuca sativa var. angustana).

 

Studies were carried out at the Beijing Vegetable Research Centre, Beijing, China, during 1988-91. Three cultivars (Jigua, Yanling and Liuye) were stored at temperatures of 0, 2, 4, 5, 10, 15 or 20 deg C under controlled atmosphere conditions (CO2%:O2% of 2:2, 2:10, 2:21, 10:2 and 20:2). Respiration rate started to increase 4 days after harvest. Ethylene production also increased after 4 days and was much higher 1 day later. Both respiration rate and ethylene production were higher in the leaves than in the stem. Slight decay was observed after 7 days and leaves started to turn from green to yellow; a significant negative correlation was observed between percentage decay and temperature. There was a highly significant positive correlation between browning and temperature. Browning was reduced under low O2 and high CO2 conditions. No relationship was shown between exposure to ethylene (1 or 10 ppm) and browning. Based on the results, the optimum temperature for storage of stem lettuce was conside

red to be 0-3 deg ; under these conditions it could be stored for 6-7 weeks.