洋圻湖的水化学特性及其渔业评价

The Water Chemical Characteristics and Evaluation of Fishery about Yangqi Lake

对洋圻湖的水化学特性周年调查表明，湖水温度分层不明显，年平均为１６．７℃，透明度年平均２６．５ｃｍ，ｐＨ值平均６．５，溶氧５．７ｍｇ／Ｌ，水体为软水。水体中无机营养元素较丰富，三氨含五平均达１．８７２１ｍｇ／Ｌ，磷酸盐含量为０．０６８３ｍｇ／Ｌ，从营养盐类并结合其它生态因子看，洋圻湖属富营养型、浅沼化的湖泊。

The annual water chemical characteristcs in Yangqi Lake were investigated, results indicated: thedividing line of water temporature in the lake was not remarkable the annual average water temperature was 16.7℃,the annual average transparency value was 26.5 cm, the annual average pH value was 6.5, dissolved oxygenwas 5.7mg/L, the water should be classified to soft water. The contents of nutrive salts in the lake was high,the amount of three N forms was 1.8721 mg/L, the content of was 0.0683mg/L. Acccording to the characteristics of nutritive salts with another ecological factors, Yangqi Lake should beclassified to nourishing shallow and swampy lake.