该研究以熟制鲢鱼块为原料，使用0、4、8 kGy电子束辐照处理后，分别置于常温和4 ℃中贮藏，通过测定贮藏期间样品菌落总数（TVC）、pH值、硫代巴比妥酸值（TBA）、过氧化值（POV）、挥发性盐基氮值（TVB-N）与质构的变化，研究不同辐照剂量及贮藏温度对熟制鲢鱼块贮藏品质的影响。结果表明，辐照剂量越高对熟制鲢鱼块杀菌效果越好，4 ℃贮藏杀菌效果优于常温贮藏。贮藏温度对鲢鱼块pH值无明显影响，但8 kGy辐照处理会降低鱼块pH值（P<0.05）。鲢鱼块TBA值随着辐照剂量的增加而增加，但不同辐照剂量、不同贮藏温度之间无显著差异（P>0.05）。与未辐照组相比，电子束辐照能有效抑制鱼块POV值和TVB-N值的升高（P<0.05）。质构测定结果显示，当贮藏温度为4 ℃、辐照剂量为4 kGy时，可保持杀菌效果的同时改善熟制鲢鱼块的硬度、弹性和咀嚼性等指标。综合考虑，以4 kGy辐照剂量处理熟制鲢鱼块，并选择贮藏温度4 ℃，其保鲜效果最佳。以上研究可为鲢鱼电子束辐照贮藏保鲜技术的推广应用提供理论依据。

In this study, cooked silver carp cubes were used as the raw materials, and they were treated with electron beam at 0, 4 or 8 kGy then stored at room temperature and 4 ℃, respectively. By measuring the changes in total viable count (TVC), pH value and thiobarbituric acid (TBA) value, peroxide value (POV), total volatile base nitrogen (TVB-N) value and texture of the silver carp cubes during storage, the effects of different irradiation doses and storage temperatures on cooked silver carp cubes on storage quality of the silver carp cubes. The results showed that the higher the irradiation dose, the better the sterilization effect was, and the sterilization effect for the storage at 4 ℃ was better than that at room temperature. The storage temperature had insignificant effect on the pH value of silver carp cubes, whilst the irradiation at 8 kGy significantly reduced the pH value of fish cubes (P<0.05). The TBA value of silver carp cubes increased with the increase of irradiation dose, but different irradiation doses and different storage temperatures (P>0.05) caused insignificant difference. Electron beam irradiation effectively inhibited the increases of POV value and TVB-N value (P<0.05) compared with the unirradiated group. Texture analyses revealed that at storage temperature of 4 ℃ and irradiation dose of 4 kGy, the sterilization effect could be maintained, while the textural indices (hardness, elasticity, chewiness, etc) of the cooked silver carp cubes being improved. In summary, the cooked silver carp cubes cold be preserved the best at an irradiation dose of 4 kGy and storage temperature of 4 ℃. The above research will provide a theoretical basis for the application of electron beam irradiation in storing and preserving silver carp.

国家重点研发计划项目（2019YFD0902000）；湖北省农业科技创新中心项目（2022-620-000-001-036）；广州市民生科技攻关计划项目（202002020087）