| 摘要: |
| 2020年10月至2021年4月，在漳浦县佛昙湾垦区对“鱼-虾-贝”多营养层次养殖的海水池塘水体进行采样分析。研究结果显示，养殖过程中，各池塘水温变动范围为17.8～25.5 ℃；盐度变动范围为33.1～35.2，偏高且较为稳定；pH值变动范围为7.94～9.46，先下降后趋稳；溶解氧变动范围为7.46～10.43 mg/L，水体溶解氧充足；化学需氧量变动范围为0.57～4.57 mg/L，总体呈上升趋势。无机氮含量变动范围为0.03～0.18 mg/L，均处于低值；活性磷酸盐含量变动范围为0.009～0.208 mg/L，在养殖后期剧增；氮磷比变动范围为0.68～17.22，呈先升后剧降趋势。养殖水体营养状况从初期的贫营养状态演变为后期的氮限制潜在性富营养化。 |
| 关键词: 海洋化学 多营养层次养殖 海水池塘 水体理化因子 水体富营养状况 评价 |
| DOI：10.3969/J.ISSN.2095-4972.2023.01.010 |
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| 基金项目:国家重点研发计划资助项目(2020YFD0900802)；福建省种业创新与产业化工程资助项目(2017FJSCZY03) |
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| Changes of physical-chemical factors and assessment of eutrophication status in integrated multi-trophic mariculture ponds |
| FANG Minjie |
| (Fisheries Research Institute of Fujian， Xiamen 361013， China) |
| Abstract: |
| From October 2020 to April 2021, the fish-shrimp-shellfish integrated multi-trophic mariculture ponds in Fotan Bay reclamation area of Zhangpu County were investigated. The results showed that the water temperature of each pond varied from 17.8 ℃ to 25.5 ℃ and salinity which is high and stable varied from 33.1 to 35.2. The pH varied from 7.94 to 9.46, and it decreased at first and then stabilized. The range of dissolved oxygen varied from 7.46 mg/L to 10.43 mg/L and the dissolved oxygen was sufficient. The range of chemical oxygen demand varied from 0.57 mg/L to 4.57 mg/L, showing an increasing pollution trend. The range of inorganic nitrogen varied from 0.03 mg/L to 0.18 mg/L, which was low comparatively. The active phosphate ranged from 0.009 mg/L to 0.208 mg/L and it increased remarkably in the later stage of aquaculture. The range of N/P ratio varied from 0.68 to 17.22 and it increased first and then decreased sharply. It shows that the nutritional status of pond water evolved from oligotrophic in the first stage, and then, to the potential eutrophication status with nitrogen limitation in the later stage. |
| Key words: marine chemistry integrated multi-trophic aquaculture seawater ponds physical-chemical factors eutrophication status water quality |
