对虾封闭式工厂化养殖水环境要素的变化特征及其相互关系

根据2002年8月7～8日对虾工厂化养成中后期A、B代表池的实测数据，分析讨论了该时期养殖水体中环境要素的变化特征及其相互关系．结果表明：研究水体水温、盐度和溶解氧含量适宜．日变化幅度不大．但pH值略为偏低，而COD值明显偏高．与该时期投饵量大，残饵及排泄物明显增加有关．但对A池来说，生物作用的影响占主导地位，而对B池而言．则以化学过程影响为主．

Variation characteristics and correlation of water environmental factors in shrimp industrialized cultivation

Based on the real data from the middle and final periods of the shrimp industrialized cultivation in two typical pools, PoolA and Pool B, on August 17 and 18,2002,the daily variation characteristicsand the correlation of the water environmental factors in this period were analyzed and discussed. The results showed that the temperature, the salt content and the DO content of the water were moderate, and the daily variation range was not wide; but the pH value was relatively low, and the COD value was obviously high.This was caused by increasing quantity of the large diet put into the residual diet and the excrement. But for the Pool A, the biological effect acted as thedominant influencing factor, for the Pool B, the chemical process did.