a decreasing trendp < 0.05
an increasing trendp < 0.05
Initially, all groups had a pH value of 7.4 ( p > 0.05), and an increasing trend was observed in the pH of the groups until day 8 ( p < 0.05), and then in some treatments there was a decreasing trend until the end of the storage period (day 18) ( p < 0.05).