池塘内循环水“跑道”系统与传统池塘养殖的三角鲂营养品质对比研究

Comparison on nutrition quality of Megalobrama terminalis cultivated based on in-pond “raceway” aquaculture system and traditional pond system

中文关键词:  “跑道”养殖  传统池塘养殖  三角鲂  肌肉  营养品质

英文关键词:in-pond “raceway” aquaculture system  traditional pond system  Megalobrama terminalis  muscle  nutrition quality

中文摘要:

      目的 对比评估池塘内循环水“跑道”养殖模式与传统池塘养殖模式下三角鲂营养品质差异。方法 对2种模式养殖的三角鲂肌肉营养组成、质构和风味物质等进行评价。结果 “跑道”养殖的三角鲂具有较低的水分及脂肪含量, 其肌肉的硬度、胶黏性、咀嚼性、单不饱和脂肪酸比例显著高于对照组(P＜0.05); “跑道”养殖模式没有明显改变三角鲂肌肉的氨基酸模式组成, 但其肌肉氨基酸总量、必需氨基酸、非必需氨基酸、呈味氨基酸均大于对照组。“跑道”养殖的三角鲂具有较为丰富的酮类、醛类等特征性风味物质, 但腥味成分壬醛和1-辛烯-3-醇明显低于对照组。结论 “跑道”养殖模式能够一定程度改善三角鲂的肌肉理化特性、风味组成和营养品质。

英文摘要:

      Objective To compare and evaluate the Megalobrama terminalis quality difference between the cycle water “raceway” aquaculture system and the traditional pond system. Methods The muscle nutrient composition, texture and flavor substance of 2 cultured Megalobrama terminalis were evaluated. Results The muscle of Megalobrama terminalis from “raceway” system had the lower content of moisture and fat, and the hardness, gumminess, chewiness and monounsaturated fatty acid ratio of the meat of Megalobrama terminalis from “raceway” system were significantly higher than those of the control group (P<0.05). The "raceway" system did not significantly change the amino acid pattern composition of Megalobrama terminalis muscle, but the total amino acids, essential amino acids, non-essential amino acids and taste-forming amino acids in muscle of Megalobrama terminalis were greater than those in the control group. The abundant ketones, aldehydes and other characteristic flavor were found in the Megalobrama terminalis meat from “raceway” system, but nonaldehyde and 1-octene-3-alcohol were significantly lower than those in the control group. Conclusion The in-pond “raceway” aquaculture system can benefit for the improvement of muscular physicochemical properties, flavor composition and nutritional quality of Megalobrama terminalis to some extent.