为探索鲈鱼片的保鲜方法，该实验将新鲜鲈鱼片分别经空气包装、真空包装和真空结合茶多酚包装后贮藏于-2 ℃微冻条件下，于贮藏第0、3、6、9、12、15、18、21 d测定鲈鱼片的菌落总数、挥发性盐基氮值（Total volatile basic nitrogen，TVB-N），pH值和水分分布等指标变化，利用低场核磁共振（Low-field nuclear magnetic resonance，LF-NMR）技术测定鲈鱼片的水分弛豫时间（T22）和弛豫面积（P22）并结合感官评价对鲈鱼片贮藏过程中品质变化进行综合判断。结果表明：随着贮藏时间的延长，在微冻贮藏期间3种包装方式下鲈鱼的菌落总数、TVB-N值都随贮藏时间的延长而逐渐升高；pH值呈现先降低后升高的趋势；弛豫时间T22、弛豫面积P22和感官评分都随着贮藏时间的延长呈现下降趋势，其中真空结合茶多酚包装方式下鲈鱼品质保持最好。综上所述，该研究证明在微冻条件下真空结合茶多酚包装处理能够较好的保持鲈鱼片的品质，研究结果为选择鲈鱼片的较佳贮藏条件提供了理论依据。

In order to explore the preservation method of weever fillets, the effects of air packaging, vacuum packaging and vacuum+tea polyphenols packaging treatments on the quality of weever fillets during a storage period of 21 days at -2 ℃ were comparatively investigated. During storage, physicochemical properties such as the total number of colonies, total volatile basic nitrogen (TVB-N), pH value and moisture distribution in weever fillets were determined on the 12th, 15th, 18th and 21st days, respectively.. The water relaxation time (T22) and relaxation area (p22) of weever fillets were illustrated by low-field nuclear magnetic resonance (LF-NMR) combined with sensory evaluation to evaluate the quality changes of weever fillets during storage. The results showed that with the extension of storage time, the total number of colonies and TVB-N of weever fillets increased with the prolongation of storage time under the three kinds of packaging methods during the period of micro-freezing, and the pH value decreased first and then increased, while T22, p22 and sensory scores all showed a decreasing trend with the extension of storage time. The results indicated that vacuum+tea polyphenols packaging treatment was the best for maintaining the quality of the weever fillets among the three different packaging treatments. In summary, the study showed that the vacuum packaging combined with tea polyphenols under micro-freezing conditions could better maintain the quality of weever fillets, and the results provided a theoretical basis for selecting the best storage conditions for weever fillets.

现代农业产业技术体系专项资金资助CARS-46