生态净养和传统养殖乌鳢的营养品质研究

乌鳢是一种营养价值较高的淡水鱼。在传统商品鱼养殖后期采用“生态净养”技术,降低产品脂肪含量,去除“土腥味”、提高肉质紧实度,使商品乌鳢品质提升。结果表明：净化组肥满度(p<0.05)和水分、粗脂肪(p<0.01)均高于池塘组。均检测出17种氨基酸,必需氨基酸、鲜味氨基酸含量普遍高于传统池塘。穿刺模式下硬度、弹性、破裂强度均高于池塘组,差异极显著(p<0.01);触碰模式中净化组硬度、咀嚼性、回复性高于池塘组差异显著(p<0.05),净化组挥发性气味物质与五点快感评价法总体高于传统池塘。Fe、Cu、Zn、p等矿物元素均高于池塘组。综上,生态净养养殖乌鳢品质特性更佳,更符合消费者的需求,有良好市场前景。

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

Black snake is a kind of freshwater fish with high nutritional value.The research group used the "ecological static breeding" technology to produce "eco-purified aquaculture" in the late stage of traditional commercial fish farming, reducing the fat content of the product, removing the "soily smell", improving the tightness of the meat quality, and improving the quality of the commercial black snake. The quality evaluation of Wuyang, "improving quality and increasing efficiency". The results showed that the fullness (p <0.05), moisture and crude fat (p <0.01) of the purification group were higher than those of the pond group. 17 kinds of amino acids were detected, and the content of essential amino acids and umami amino acids was generally higher than that of traditional ponds. In the puncture mode, the hardness, elasticity and rupture strength are higher than the pond group, the difference is very significant (p <0.01); in the touch mode, the hardness, chewability and recovery of the purification group are higher than the pond group (p <0.05), the purification Group volatile odor substances and five-point pleasure evaluation method are generally higher than traditional ponds. Mineral elements such as Fe, Cu, Zn, P are higher than the pond group. In summary, the ecologically purified aquatic snakehead has better quality characteristics, more in line with consumer demand, and has a good market prospect.