北海营盘马氏珠母贝养殖海域春秋季水化学环境参数变化特征

于2008年9月21日和2009年4月12日对北海营盘青山头马氏珠母贝(Pinctada martensii Dunker)养殖区进行春、秋两季水化学要素调查与测定。结果显示,营盘青山头南珠养殖区水质良好,各水化学要素符合海水水质二类标准;秋季活性硅酸盐与盐度成显著正相关(r=0.828),无机磷与pH值、活性硅酸盐与溶解氧、无机磷与叶绿素a都有较高的正相关趋势,春季营养盐与各环境因子的相关关系不显著;春季N、P和秋季N、P、Si含量持平或高于浮游植物摄食的最低阈值,其中秋季Si含量丰富;春、秋两季氮磷比平均值分别为7.0和5.5,均以氮为浮游植物摄食的限制因子;营盘马氏珠母贝养殖区的无机氮以氨氮的存在为主要形式,春、秋两季氨氮所占无机氮含量的比例最高,分别为56.6%和74.4%。

Analysis of the Hydrochemistry Environmental Parameter Variations in Culture Areas of Pinctada martensii Dunker in Beihai Yingpan

The survey and testing of hydrochemistry elements in culture areas of Pinctada martensii Dunker in Qingshantou of Yingpan town were conducted in spring and autumn from 2008 to 2009 in Beihai city.The experiment results indicated that sea water in the culture areas of Qingshantou is high quality,and all the hydrochemistry elements met the second class of water quality standard.The active silicate is significant positive correlation with salty in autumn（r=0.828）.In addition,there were positive correlations between dissolved inorganic phosphorus（DIP） and pH,silicate and dissolved oxygen（DO）,DIP and chlorophyll a（chl-a）,while no significant relationship between nutrient salts and the environment factorts in spring.The contents of nitrogen and phosphorus in spring and nitrogen,phosphorus and silicate in autumn were equal to or greater than the minimum threshold of the phytoplankton ingesstion.Silicate content is rich in autumn.The average of nitrogen and phosphorus in sping and autumn were 7.0 and 5.5 and the nitrogen was the limited factor to the feeding of phytoplankton.The mutual transformation among the three states nitrogen showed that NH4-H was the main form of dissolved inorganic nitrogen（DIN） with highest proportion 56.6% in spring and 74.4% in autumn.