不同储藏条件下长白猪肌肉pH、糖原、乳酸及TBA的变化及相关关系  

Changes and Correlations of Landrace Muscle pH,Glycogen, Lactic Acid and TBA in Different Storage Conditions

作　　者：郭建凤[1] 武英[1] 王继英[1] 呼红梅[1] 张印[1] 蔺海朝[1] 王诚[1] 

机构地区：[1]山东省农科院畜牧兽医研究所,山东省畜禽疫病防治与繁育重点实验室,山东济南250100

出　　处：《江西农业大学学报》2011年第1期100-106,共7页Acta Agriculturae Universitatis Jiangxiensis

基　　金：山东省农业良种工程项目(2006LZ08);农业公益性行业科研专项(nyhyzx07-034);山东省农科院青年基金项目(2006YQN032)

摘　　要：研究测定了长白猪屠宰后12 h肌肉pH、糖原、乳酸和脂质氧化的变化,不同储藏温度和时间对肌肉pH值、失水率、糖原、乳酸及脂质氧化的影响及相关关系。结果表明:宰后12 h长白猪背最长肌pH值显著降低,乳酸含量显著升高,肌肉糖原和TBA值含量变化不显著。4℃冷藏条件下,储存时间对长白猪肌肉pH和糖原含量影响不显著,对滴水损失、乳酸和TBA含量影响显著。-20℃冷冻条件下,储存时间对长白猪肌肉pH、乳酸和TBA值影响极显著,对解冻失水率和糖原含量影响不显著。相关性分析表明,宰后12 h TBA值与糖原、乳酸正相关,相关系数分别为0.312(P<0.01)和0.355(P<0.01),pH与乳酸负相关,相关系数为-0.599(P<0.01);4℃冷藏条件下,pH与滴水损失负相关,相关系数为-0.340(P<0.01),其他相关性不显著;-20℃冷冻条件下,TBA与pH极显著正相关,相关系数为0.424(P<0.01),TBA与解冻失水率显著负相关,相关系数为-0.356(P<0.05);pH与解冻失水率极显著负相关,相关系数为-0.492(P<0.01)。The changes and correlations of pork muscle pH,glycogen,lactic acid and intramuscular fat oxidation of Landrace 12 h after slaughter,the effects of different levels of storage temperature and time on muscle pH values,water loss rate,glycogen,lactic acid and 2-thiobarbituric acid（TBA） were studied.The results showed that the pH descended significantly,lactic acid content increased significantly,changes of muscle glycogen and TBA contents were not statistically significant 12 h after slaughtering.With the storage condition of 4 ℃,the effect of storage time on pH value and glycogen was not statistically significant,but it was statistically significant on drop loss,lactic acid and TBA value.With the storage condition of-20 ℃,the effect of storage time on pH value,lactic acid and TBA value was extremely statistically significant,but was not statistically significant on unfreeze water loss rate and glycogen.Correlation analyses showed that TBA values had extremely remarkable positive relation to muscle glycogen and lactic acid,the correlation coefficients were 0.312（P0.01）and 0.355（P0.01）,pH had extremely remarkable negative relation to lactic acid,the correlation coefficients was-0.599（P0.01） 12 h after slaughter.With the storage condition of 4 ℃,pH had extremely remarkable negative relation to drop loss,the correlation coefficient was-0.340（P0.01）,the other correlations were not statistically significant.With the storage condition of-20 ℃,TBA had extremely remarkable positive relation to pH values,the correlation coefficient was 0.424（P0.01）,TBA had remarkable negative relation to unfreeze water loss rate,the correlation coefficient was-0.356（P0.05）.pH had extremely remarkable negative relation to unfreeze water loss rate,the correlation coefficient was-0.492（P0.01）.

关 键 词：长白猪 温度 时间 PH值 糖原 脂质氧化 相关性 

分 类 号：S828.211[农业科学—畜牧学]