摘要
对观音山水库水化学、浮游生物及利用进行了调查研究。（１）库水属Ｓ、中营养型，含盐量很低；营养元素Ｎ／Ｐ平均９５．６，磷是限制性因子。２）浮游生物量平均４．５２４７ｍｇ／Ｌ，其中浮游植物量平均３．０６０６ｍｇ／Ｌ，以硅藻、裸藻和甲藻占优势；浮游动物量平均１．４６４１ｍｇ／Ｌ，以枝角类和桡足类占优势，分别占６９．２％和３０．２％。（３）鱼产力为１１２８ｋｇ／ｈｍ２，鲢、鳙、鲤每公顷放养尾数分别为９２２、６４５和４７０（都在１３．３ｃｍ或１３．３ｃｍ以上）。（４）提出渔业利用意见。
This paper presents the result of investigation on the hydrochemistry and plankton of Guanvinshan Reservoir and its utilization during May-October, 1993. The reservoir covers 334hm2 and its average water depth is about 20m. Its water is type SNa, mesotrophy and Poor in dissolved salts. The mean N/P ratio is 95.6, Phosphorus is limiting factor. On an average, the biomass of plankton is 4.5247mg/L, in which phytoplankton's is 3.0606mg/L──Bacillariophyta, Euglenophyta and Chlrophyta predominate,the biomass of zooplankton is 1.4641mg/L.-Cladocera and Copepoda make up respectiv ely 69.2% and 30.2 % Fish productivity is 1128.0kg/hm2, and Hypophthalmichthys molitrix,Aristichths nobilis and Cyprinus carpio are 922/hm2, 645/hm2 and 470/hm2 respectively.The average body length of these fish is no less than 0.13m. Proposals are put forwardto fishculture utilization as well.
关键词
水库
水化学
浮游生物
鱼产力
Reservoir
Hydrochemistry
Plankton
Fish productivity
