北海湾海水中溶解性Si的地球化学特征

Geochemistry characteristics of disolved Si in seawater of Beihai Bay

根据 1998 10至 1999 0 8对北海湾的调查研究资料 ,对海水中溶解性Si的含量分布、相关因素及Si∶N∶P值进行了分析。结果表明 :本湾Si主要以陆源输入为主 ,其中夏秋季呈明显的保守性 ;春、夏、秋三季度月均以物理过程为主要影响因素 ,生物活动和物理化学作用也占有重要地位 ;P是本湾浮游植物的主要控制因子 ,N次之 ,Si是本湾最丰富的营养盐。

Based on the investigations in Beihai Bay from October 1998 to August 1999, the Si contents distribution, the influence factors and the ratios of Si: N: P in the seawater were studied. The results showed that the import of Si was mainly from land, which presented obvious conservative in summer and autumn. The physical process was the main influence factor in spring, summer and winter. And biological activity and physical chemistry function occupied the important position too. Among the influence factors on the phytoplankton in this bay, P was first and N second. Si was the richest nutrient salt in this bay.