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南极大磷虾粉对卤虫脂肪酸和氨基酸的营养强化作用

陆建学,林听听,黄艳青,高露姣**,龚洋洋,夏连军,黄洪亮   

  1. (中国水产科学研究院东海水产研究所, 农业部东海与远洋渔业资源开发利用重点实验室, 上海 200090)
  • 出版日期:2013-06-10 发布日期:2013-06-10

Nutrient enrichment effect of Antarctic krill (Euphausia superba) powder on the fatty acid and amino acid compositions in Artemia-nauplii.

LU Jian-xue, LIN Ting-ting, HUANG Yan-qing, GAO Lu-jiao**, GONG Yang-yang, XIA Lian-jun, HUANG Hong-liang   

  1. (Key Laboratory of East China Sea and Oceanic Fishery Resources Exploitation, Ministry of Agriculture, East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shanghai 200090, China)
  • Online:2013-06-10 Published:2013-06-10

摘要: 以卤虫(Artemia sp.)Ⅱ龄无节幼体作为试验材料,研究0、75、150、225 mg·L-1的南极大磷虾(Euphausia superba)粉对卤虫体内脂肪酸和氨基酸的强化效果,试验共进行18 h,每6 h取样检测一次。结果表明:强化组各时段的二十二碳六烯酸、ω3系列多不饱和脂肪酸总量以及多不饱和脂肪酸总量均显著高于对照组;除了75和225 mg·L-1组6 h的二十碳五烯酸与对照组无显著差异外,其他各时段的二十碳五烯酸亦显著高于对照组;75 mg·L-1组18 h以及150 mg·L-1组12和18 h的二十碳四烯酸亦显著升高;150 mg·L-1组的必需氨基酸总量和总氨基酸含量均显著高于对照组,此外,150 mg·L-1组各时间段的必需氨基酸总量/氨基酸总量比值显著高于其他两个强化组和对照组,225 mg·L-1组12 h的必需氨基酸总量/氨基酸总量比值显著高于对照组;南极大磷虾粉对卤虫的脂肪酸和氨基酸均具有较好的营养强化效果,并以150 mg·L-1的强化浓度,12和18 h的强化时间为宜。

关键词: 基岩起伏, 土岩界面, 土壤水分格局, 喀斯特坡地, 土壤剖面

Abstract: This paper studied the nutrient enrichment effect of Antarctic krill (Euphausia superba) powder at four concentrations (0, 75, 150, and 225 mg·L-1) on the fatty acid and amino acid compositions in brine shrimp (Artemia sp.) nauplii. The nauplii samples were taken every 6 h until 18 h. As compared with the control, the nauplii fed with Antarctic krill powder had significantly higher contents of docosahexaenoic acid, total ω3 polyunsaturated fatty acids, and total polyunsaturated fatty acids at each sampling time. Except that the eicosapentaenoic acid content in the treatments of 75 and 225 mg·L-1 of Antarctic krill powder at the sampling time of 6 h had no significant difference with the control, the eicosapentaenoic acid content in the treatments of feeding with Antarctic krill powder at other sampling time was significantly higher than that of the control. The arachidonic acid in the treatments of 75 mg·L-1 of Antarctic krill powder at the sampling time of 18 h and of 150 mg·L-1 of Antarctic krill powder at the time of 12 and 18 h was also increased significantly. For amino acids, the contents of essential amino acids (EAA) or total amino acids (TAA) in the treatment of 150 mg·L-1 of Antarctic krill powder were significantly higher than those of the control. Moreover, the EAA/TAA ratio in the treatment of 150 mg·L-1 of Antarctic krill powder was significantly higher than that in the other three treatments. A significantly higher EAA/TAA ratio was also found in the treatment of 225 mg·L-1 of Antarctic krill powder at the sampling time 12 h, as compared to the control. In sum, Antarctic krill powder had better effect in enriching the fatty acid and amino acid compositions in Artemia sp. nauplii, and the recommended concentration and treatment time for the enrichment were 150 mg·L-1 and 12  or 18 h, respectively.

Key words: soil-bedrock interface, soil water content pattern, soil profile, irregular bedrock topography, Karst hillslope.