Abstract:
To investigate the effects of different packaging methods on microbial composition of chilled chicken during storage, the microbial diversity was analyzed by Illumina MiSeq high-throughput sequencing. The results showed that the modified atmosphere packaging (MAP), the vacuum packaging (VP) and the nitrogen-filled packaging (N
2) could significantly reduce the number of microorganisms and volatile base nitrogen during refrigeration at 4 °C compared with the pallet packed (PP) group. High-throughput sequencing showed that the bacterial species richness of chilled chicken was high in the early stage of storage. The dominant bacteria of chilled chickens in PP group at the later stage of storage were
Pseudomonas,
Brochothrix,
Acinetobacter and
Shewanella. It indicated that they could tolerate lower temperatures. Compared with the PP group, the abundance of
Pseudomonas and
Acinetobacter in MAP group decreased by 14.8% and 9.2%, respectively, while nitrogen-filled packaging reduced the abundance of
Acinetobacter and
Shewanella. by 9.6% and 7.4%, respectively. The abundance of
Acinetobacter and
Brochothrix decreased significantly by 8% and 5.6% after vacuum packaging. Different packaging methods could have a greater impact on the flora in chilled chicken meat. All three types of packaging could inhibit the growth of
Acinetobacter and MAP had a better inhibitory effect on
Pseudomonas, while nitrogen-filled packaging and vacuum packaging had a better inhibitory effect on
Shewanella and
Brochothrix. This study also provides a theoretical basis for the future packaging methods used in chilled chicken meat.