生态净养和传统养殖乌鳢的营养品质研究

Study on nutritional quality of black snake in ecological purification culture and traditional pond

中文关键词:  乌鳢  生态净养养殖  营养成分  氨基酸  质构特征  感官评价

英文关键词:black snake  ecological purification farming  nutrient content  amino acid  texture feature  sensory evaluation

中文摘要:

      目的 为了比较生态净养和传统养殖的乌鳢营养品质。方法 测定生态净养和传统池塘养殖2组乌鳢肌肉中蛋白质、脂肪、矿物质和氨基酸等营养成分, 并通过生物特性、感官评价、风味物质测定比较其品质和营养价值。结果 生态净养组肥满度(P<0.05)、水分、粗脂肪(P<0.01)、Fe、Cu、Zn、P等矿物元素均高于传统池塘组; 2组均检测出17种氨基酸, 生态净养组的必需氨基酸、鲜味氨基酸含量普遍高于传统池塘组; 在穿刺模式下, 生态净养组的硬度、弹性、破裂强度均高于传统池塘组, 差异极显著(P<0.01); 触碰模式中, 生态净养组的硬度、咀嚼性、回复性高于传统池塘组, 差异显著(P<0.05); 生态净养组的挥发性气味物质与五点快感评价法也总体高于传统池塘组。结论 生态净养组品质特性更佳, 更符合消费者的需求, 有良好市场前景。

英文摘要:

      Objective To compare the nutritional quality of black snake between ecological purification culture and traditional pond. Methods Protein, fat, minerals and amino acids in the muscles of black snake were determined in the two groups of ecological purification and traditional pond. Their quality and nutritional value were compared by biological characteristics, sensory evaluation and flavoring substance determination. Results The mineral elements such as fertilizer fullness (P<0.05), water content, crude fat (P<0.01), Fe, Cu, Zn and P in the ecological purification group were all higher than those in the traditional pond group. Seventeen kinds of amino acids were detected in both groups, and the contents of essential amino acids and umami amino acids in the ecological purification group were generally higher than those in the traditional pond group. In the puncture mode, the hardness, elasticity and rupture strength of the ecological purification group were all higher than those of the traditional pond group, with extremely significant differences (P<0.01). In the touch mode, the hardness, mastication and resilience of the ecological purification group were higher than those of the traditional pond group, with significant differences (P<0.05). The volatile odor substances and the five-point pleasure evaluation method in the ecological purification group were also generally higher than those in the traditional pond group. Conclusion The ecological purification group has better quality characteristics, more in line with the needs of consumers, and has a good market prospect.