การรักษาคุณภาพของหน่อไม้ฝรั่งสดโดยใช้สภาวะความเย็นเฉียบพลันก่อนการเก็บรักษา
สุชาลินี กลั่นยิ่ง เฉลิมชัย วงษ์อารี และ ชัยรัตน์ เตชวุฒิพร
วารสารวิทยาศาสตร์เกษตร 43 (3พิเศษ):327-330. 2555.
2555
บทคัดย่อ
Asparagus is a tropical crop of economic importance which is exported to Japan with increasing volume. Decay and increased toughening are important problems during storage. Therefore, choosing an appropriate postharvest technology to control asparagus quality is necessary. Recently, cold shock treatment (CST) has been used for extending storage life and maintaining postharvest quality of many fresh produce. In this present research, the effect of CST on changes andquality of asparagus was investigated. Grade A ‘Block Improved’ asparagus spears (1 cmin diameter and 15 cm in length) were immersed in iced water (0°C) for 60 min, compared to undipped control, and then were air-dried at ambient temperature. Pre-treated asparagus spears weighting 150 g were packed in a sealed 40 mm polyethylene (PE) bag of (7” x 10” in size). The packages were kept at 4°C, 90-95% relative humidity and sampled for quality monitoring at 4 day intervals. O2 and CO2were in equilibrium in day 12. Fresh weight loss of the control was higher than that of CST treatment when texture of asparagus as determined by shear force was increased after 8 days in storage and then declined to day 24 without a significant difference between the treatments. Furthermore, CST treatment tended to result in higher fiber and vitamin C levels but lower lignin content. Although CST improved the appearance of stored asparagus, there was no significant difference of quality extension parameters between the treatments.