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本文探讨了浙江南部海域1990年春季发生赤潮期间的水化学特征和富营养化状况,及与赤潮生物的线性回归关系。分析结果表明,该海域出现高营养盐以至形成富营养化乃是江浙沿岸流和瓯江等河流径流及远岸区盐度锋辐聚的综合影响的结果。根据回归分析,NO_3-N,SiO_3-Si与浮游植物细胞密度之间存在着较为显著的负相关。亦即N,Si和高N/P比(35:1左右)可能是导致浮游植物(夜光藻)异常增殖的重要因素。
In this paper, the hydrochemical characteristics and eutrophication during the red tide occurring in the southern part of Zhejiang Province in the spring of 1990 were discussed, and the linear regression relationship with red tide organisms was discussed. The results show that the occurrence of high nutrient salts and the formation of eutrophication in this area are the result of the combined effects of runoff from rivers such as Jiangsu and Zhejiang, and the radial flow salinities in the far shore. According to the regression analysis, there is a significant negative correlation between NO_3-N, SiO_3-Si and phytoplankton cell density. That is, N, Si and high N / P ratio (around 35: 1) may be important factors leading to the abnormal proliferation of phytoplankton (Noctiluca cerana).