蛤蜊中金属营养元素的影响因素及来源

探讨产地、季节、品种对蛤蜊中金属营养元素含量的影响,解析蛤蜊中金属营养元素含量与养殖地淤泥和海水中相关元素含量间的关系。于2014年5月和9月在青岛市、南通市和大连市海岸采集花蛤、文蛤及养殖地淤泥和海水样品,测定样品中金属营养元素含量,分别进行方差分析和Pearson相关分析。结果显示,蛤蜊中Mg、K、Ca、Mn、Fe、Cu、Zn含量受产地的影响,Ca、Cu、Zn含量受季节的影响,Mg、Ca、Mn、Fe、Cu、Zn含量与品种有关;Na、Mg、Ca、Co、Cu含量与淤泥中相关元素的含量密切相关,而10种金属营养元素含量与海水中相关元素含量相关性均不显著。本研究表明,蛤蜊中金属营养元素含量受产地、季节、品种的影响,其来源除淤泥、海水外,还有其他途径。

Identification of Influencing Factors and Sources of Metal Nutrient Elements in Clams

The objectives of this study were to investigate the effects of geographical origin, growing season, and variety on
the contents of metal nutrient elements in clams, and to analyze the relationships of the contents of metal nutrient elements in
clams with those in sediment or seawater. Samples of Ruditapes philippinarum, sediment, and seawater were collected from
the coasts of Qingdao, Nantong, and Dalian while samples of Meretrix meretrix were obtained from the coast of Nantong in
May and September 2014, separately, for the determination of metal nutrient elements. The data obtained were analyzed by
analysis of variance and Pearson correlation analysis. The results showed that the contents of Mg, K, Ca, Mn, Fe, Cu, and
Zn in clams were affected by geographical origin; the contents of Ca, Cu, and Zn were influenced by growing season; and
the contents of Mg, Ca, Mn, Fe, Cu, and Zn were affected by variety. In addition, the contents of Na, Mg, Ca, Co, and Cu in
clams were significantly associated with those in sediment but no significant correlation existed between clams and seawater
for the 10 elements. This study indicated that the contents of metal nutrient elements in clams were affected by geographical
origin, season, and variety. Their sources included sediment and seawater as well as others.