摘要
本文报道了在１９９４年７月至９月间莱州湾海水养罗非鱼围隔生态系浮游植物优势种、叶绿素浓度与理化因子的关系。各浮游植物优势种与理化因子的相关性基本一致，但其相关程度不同，主要优势种卵形隐藻、海洋原甲藻和扁藻与各理化因子的关系最紧密。从总体水平上，各种理化因子对浮游植物影响的相对重要性依次为ＴＮ＞ｐＨ＞ＴＰ＞ＮＯ２－Ｎ＞ＤＯ＞ＣＯＤ＞ＳＤ＞ＮＨ４－Ｎ＞ＰＯ４－Ｐ。氮磷对浮游植物的相对影响取决于氮、磷的比值。在本实验条件下，适宜的 ＴＮ／ＴＰ为 １８左右。施鸡粪和投饵两种养鱼方式中，氮和磷分别是浮游植物生长的限制因子。本文还就浮游植物变动对罗非鱼的影响进行了讨论。
This paper reports the results of a preliminary study of the relationship between the dominant species and chlorophyll content of phytoplankton and TN, TP, COD, NH1-N, pH, NO2-N, PO4-P and DO. The relationship between each dominant species and physico - chemical factors is consistent, but their relativity different. The main dominant species such as Crvotomonas ovata, Prorocentrum micans and Platymonas tetrathele are most closely related to the factors. On the average level, the order of relative. importance between the factors and the total chlorophyll is as follow: TN>pH>TP>NO2 -N>DO>COD>NH4-N>PO4-P. The relationship between the total chlorophyll and nitrigen and phosphorus depends on the value of TN/TP. Under conditions of the experiment, the most suitable range of TN/TP to the growth of phytoplankton is about 18. In the model of tilapia-rearing with chicken manure, the value of TN/TP is low and nitrigen is the limited factor; in the model of tilapia-rearing with feeding, TN/TP high, and phosphorus is the limited factor. Nitrigen and phosphorus play a major role in the two tilapia-rearing model respectively. The aproachments to the effects of phytoplankton on tilapia are also discussed in this paper.
出处
《中国水产科学》
CAS
CSCD
1996年第1期56-63,共8页
Journal of Fishery Sciences of China
基金
国家攀登计划 B PD-B6-7-3专题<对虾池生态系及其结构与功能的优化>的部分成果。
关键词
浮游植物
生态系
罗非鱼
海水池塘
莱州湾
Phytoplankton, Enclosure ecosystem, Tilapia, Seawater pond, Laizhou Bay
