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根据2001年6月至2002年6月大鹏澳网箱养殖水域周年的溶解氧(DO)水平监测数据,阐述网箱养殖区水体DO的水平、季节的变化、垂直变化和网箱养殖水体DO质量评价以及DO与水环境因子的相关性。结果表明,大鹏湾网箱养殖水域DO周年水平为3 86～8 01mg/L,氧饱和度为51 6%～103 6%,养殖水域DO水平低于非养殖水域的;冬、春季DO水平较高,均符合我国渔业水质标准要求。夏季DO水平普遍较低,超标率为95%;表层水DO水平略高于底层水,DO水平超标率分别为46%和66 7%;DO水平(全年)与pH值、盐度、叶绿素水平均呈显著性正相关(P<0 02,n=32),与水温、无机磷和无机氮水平呈显著性负相关(P<0 02,n=32)。其中,在春季相关最为明显。
According to the monitoring data of dissolved oxygen (DO) level during the annual breeding of cages in Dapeng’ao from June 2001 to June 2002, the DO level, seasons and vertical variations of DO in aquaculture waters were described. Quality evaluation and DO and water environmental factors. The results showed that the annual DO level of cage culture waters in Dapeng Bay was 3 86 ~ 8 01 mg / L, the oxygen saturation was 51 6% ~ 103 6%, and the DO level in breeding waters was lower than that in non-breeding waters. DO and DO levels in winter and spring Higher, are in line with China’s fishery water quality standards. The DO level in summer was generally low, and the exceeding standard rate was 95%. The DO level in surface water was slightly higher than that in bottom water, and the DO level exceeded the standards by 46% and 66 7% respectively. (P <0 02, n = 32). There was a significant negative correlation between water temperature, inorganic phosphorus and inorganic nitrogen (P <0 02, n = 32). Among them, the most obvious correlation in the spring.