摘要
实验研究１９９４年５～８月即墨金口养殖场虾病发生前，养虾池中叶绿素ａ总量、去镁叶绿素含量、不同粒径浮游植物叶绿素ａ含量以及营养盐的变化。结果表明：在整个调查期间两个养虾池中叶绿素ａ含量逐月减小，分别从４９．９８ｍｇ／ｍ３和２５．５４ｍｇ／ｍ３降至１．５０ｍｇ／ｍ３和３．３０ｍｇ／ｍ３，去镁叶绿素含量呈上升趋势。微型（２～２０μｍ）的浮游植物叶绿素ａ含量最大，分别为７４．３％和６８．４％，超微型（２～０．４５μｍ）分别为２０．４％和２７．５％，小型（＞２０μｍ）的叶绿素ａ含量最小，分别为５．５％和４．２％。所调查虾池中无机磷含量均超过富营养化阈限，无机氮含量接近富营养化阈限。
The total amount of the chlorophyll a, phaeophytin, chlorophyll a contents of sizefractionated phytoplankton and the influence of nutrients on the growth of phytoplankton, which were sampled from two shrimp ponds in JIN KOU JI MO, were studied from May to August 1994 before and after the outbreak of the shrimp disease. The contents of chlorophyll a were decreasing during the investigation, from 46.98mg/m3 to 1.501mg/m3, and from 25.54mg/m3 to 3.30mg/m3, but the contents of phaeophytin was increasing at same time. Nanophytoplankton(2~20μm) is the most important part which makes up the total phytoplankton in both shrimp ponds, 74.3% and 68.4%, picophytoplankton(2~0.45μm) 20.4% and 27.5%, microphytoplankton (>20μm) 5.5% and 4.2% respectively. During the investigating the contents of DIN did not exceed the threshold of eutrophication, but the contents of DIP exceed the threshold of eutrophication almostly from May.
基金
国家自然科学基金
