不同预冷终温对厚皮甜瓜常温货架期生理和商品率的影响

Effect of Cooling End Temperatures on Physiology and Commodity Rate of Muskmelon in Shelf Life at Normal Temperature

[目的]研究不同预冷终温对新疆厚皮甜瓜抗病86货架期基本生理指标和商品率指标的影响,确定适宜的预冷工艺参数.[方法]测定常温货架期内15℃终温、8℃终温、3℃终温和对照CK（不预冷）4个预冷处理抗病86果实的发病率、发病指数和失水率的动态变化;测定全果、带籽果肉、去籽果肉与瓤籽的呼吸强度、乙烯释放量的动态变化.[结果]瓤籽的呼吸和乙烯峰值是果肉的4和8倍左右;8℃终温处理果实各部位的呼吸峰值比CK低13％ ～ 37％;乙烯峰值比CK低10％～42％,货架终期的发病率和发病指数分别比CK低55％和63％;而3℃终温处理果实的呼吸峰、乙烯峰出现时间最早,货架终期的发病率和发病指数接近CK.[结论]晚熟网纹厚皮甜瓜抗病86适宜的预冷终温为8℃,常温货架期内可抑制采后后熟劣变,最低商品率（15％）出现时间相对CK延迟10 d以上.

[ Objective] Effect of cooling end temperatures on basic physiology and commodity rate of muskmelon Kangbing 86 in shelf life was analyzed to determine the parameters for developing the cooling tech- nology. [ Method ] The physiology changes including respiration rates and ethylene releases among whole fruits, pulps without seeds, pu disease index and water loss of lps with seeds, seeds, and the commodity rate changes including incidence, Kangbing 86 with the cooling end temperature treatments at 15℃, 8℃, 3℃ and CK（ no cooling） were analyzed during the shelf life at normal temperature. [ Result ] The climacteric peaks of respiratory and ethylene of seeds were about 4 times and 8 times higher than the pulp. The climacter- ic peaks of respiratory and ethylene of different tissues in pepob cooling end temperature at 8℃ were respec- tively lower 13% -37% and 10% -42% than the CK, which had the 55% incidence and 63% disease index lower than the CK also in terminal. The climacteric peaks of respiratory and ethylene of pepo＇s cooling end temperature at 3 ℃ were earlier than other treatments, which had the proximately incidence and disease index close to CK in terminal. [ Conclusion ] Late maturing mask melon Kangbing 86 treated of proper cooing end temperature 8℃ further ripens slowly and decayed at 15% above 10 days later than the CK.