pH、溶解氧、叶绿素a之间相关性研究Ⅰ:养殖水体
Study on the relationships among pH, dissolved oxygen and chlorophyll a Ⅰ:Aquaculture water
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摘要: 利用国内、外近20年的资料和饮用水水源地潘家口水库现场围隔实验结果,分析养殖水体中pH、溶解氧 (dissolved oxygen, DO)和叶绿素a之间的相互关系。结果表明,当叶绿素a平均含量低于10 μg/L时,水体交换弱的夏季和秋季养殖水域水体中pH、DO与叶绿素a无明显相关甚至无相关;水体交换强的夏季和秋季养殖水域水体中pH与叶绿素a呈显著正相关,DO与叶绿素a可能呈显著正相关或无相关。但夏季和秋季现场围隔实验水体中叶绿素a平均含量低于90 μg/L时,pH与叶绿素a无相关,DO与叶绿素a无明显相关甚至无相关。现场围隔实验水体及养殖水域水体中pH和DO均有明显的日变化规律,现场围隔实验水体中pH和DO呈显著正线性相关。Abstract: Domestic and foreign data in nearly two decades and our field enclosure experimental results in Panjiakou Reservoir were collected to analyze the relationships among pH, dissolved oxygen (DO) and chlorophyll a in aquaculture water. The result showed that when the mean concentration of chlorophyll a was less than 10μg/L, no obvious correlation or no correlation was found between pH, DO and chlorophyll a in weak-exchangeable aquaculture water during summer and autumn. In comparison, a significant positive correlation between pH and chlorophyll a, and a significant positive correlation or no correlation between DO and chlorophyll a were found in strong-exchangeable aquaculture water during summer and autumn. In field enclosure experiments, when the average concentration of chlorophyll a was less than 90 μg/L during summer and autumn, no correlation was found between pH and chlorophyll a, and no obvious correlation or even no correlation between DO and chlorophyll a was found. Strong diurnal variations for both pH and DO were identified in field enclosures and aquaculture water. A significant positive linear correlation between pH and DO was found in field enclosures.
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Key words:
- pH /
- dissolved oxygen /
- chlorophyll a /
- correlation /
- aquaculture water
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