| 摘要: |
| 1991年3－6月和1992年3－6月在南汇县东海水产养殖公司对罗氏沼虾育苗用水调配原则与不同基础水的调配方法进行试验研究。结果表明，育苗用水中Mg2+与Ca2+含量及Mg2+／Ca2+必须达到一定的范围，这是调配的基本原则。以鱼塘水作基础水时，需添加6种化学药品，其中Mg2+与Ca2+含量可适范围分别为300.0－440.0 mg/L与170.0－244．0 mg/L，Mg2+／Ca2+比值（R）为1.8－2.2；以深井水为基础水时，需添加10种药品，Mg2+与Ca2+可适范围分别为324.0 – 440.0 mg/L和170.0－244．0 mg/L，R值为1.8－2.0.研究表明，以河口水育苗最为经济，出苗率高，如其盐度或Mg2+与Ca2+含量及R值不在可适范围之内，可以淡水稀释或添加浓缩海水，并按鱼塘水Mg2+与Ca2+及R合适值作相应调配。 |
| 关键词: 罗氏沼虾 调配水 镁离子 钙离子 比值 育苗 出苗率 |
| DOI： |
| 分类号: |
| 基金项目:上海市科委下达课题，903213049号 |
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| EFFECTS OF Mg2+, Ca2+ AND Mg2+/Ca2+ CONTENTS ON SURVIVAL RATES OF MACROBRACHIUMROSENBERGII LARVAE REARED IN MIXED WATER |
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Zang Weiling, Dai Xilin, Zhang Jianda, Zhu Zhengguo
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Department of Culture, Shanghai Fisheries University, Shanghai 200090
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| Abstract: |
| Mixed principles and methods with different basic water for rearing larva of Marcrobrachium rosenbergii were studied from 1991 to 1992 in Donghai Farm of Nanhui County. The results were as follows:
Using freshwater as the basic water in the fish pond for rearing the larva, six chemical reagents (MgSO4, CaC12, KCl, H3BO3, KBr, NaCl) must be added to the
basic water. Suitable contents of Mg2+ and Ca2+ in the mixed water were 300.0 - 440.0 mg/L and 170.0 - 244.0 mg/L respectively, and Mg2+/Ca2+ ratios (R) was 1.8 - 2.2 Using deep-well water as the basic water, the above 6 chemical reagents and NaH2PO4, ZnSO4, CuSO4, KI must be added to the basic water, the suitable contents of Mg2+ and Ca2+ in the mixed water were 324.0 - 440.0 mg/L and 170.0 - 244.0 mg/L
respectively at R of 1.8 - 2.0. The study showed rearing larva with alongshore estuary water was the most economic and yielded high survival rates. If the contents of Mg2+, Ca2+ or Mg2+/Ca2+ were not in the above suitable ranges, the basic water was diluted with freshwater, or concentrated solution mixture of Mg2+ and Ca2+ at R of 1.8 - 2.0 were added to the fish pond water. |
| Key words: Macrobrachium rosenbergii, Mixed water, Magnesiumion, Calciumion, Ratio, Rearing larva, Survival rates |
