微冻保鲜对南美白对虾品质的影响研究

摘要

以南美白对虾为试验对象，研究微冻保鲜（-4℃）对肌肉品质的影响。采用常规方法检测了对虾肌肉pH、挥发性盐基氮、细菌总数、K值以及硬度和弹性。结果表明，随着贮藏时间的延长，pH、挥发性盐基氮、细菌总数和K值呈现升高趋势，硬度和弹性指标呈现下降趋势。与4℃贮藏的对照组比较，微冻保鲜在贮藏后期显著改善了（P<0.05）南美白对虾各项指标的变异程度，结果揭示微冻保鲜可以通过延缓对虾肌肉的腐败进而提高其品质，旨在为对虾保鲜技术提供一定的借鉴。%The present research evaluated the effect of superchilling storage (-4℃) on the quality of shrimp, Litopenaeus vannamei. The pH value, total volatile basic nitrogen (TVB-N), total viable count (TVC), K value and hardness and springiness of shrimp muscle samples were determined using routine methods. The results determined in the present study showed that pH values, TVB-N, TVC and K value increased with the storage days. However, the hardness and springiness decreased with the storage days. In the later days, shrimp showed improved significantly parameters in superchilling storage (-4℃) (P<0.05) compared to those in normal storage (4℃). It indicated that superchilling storage could be used to delay the corruption of the shrimp muscle and thereby improve the corresponding quality. The present study was to present a reference for the technology of shrimp preservation.