井盐水培育轮虫过程中碳酸钙浓度过饱和的危害及防控方法的研究  

Study on the harm and prevention methods of calcium carbonate concentration oversaturation in the process of breeding rotifers in well salt water

作　　者：梁芳 李影 李让 刘芳 邢冬飞 耿丹 孙娜 LIANG Fang;LI Ying;LI Rang;LIU Fang;XING Dongfei;GENG Dan;SUN Na(Panjin Photosynthetic Crab Industry Co.,LTD.(Key Laboratory of Breeding and Breeding of Chinese Mitten Crab,Liaoning Province Crab Technology Innovation Center,Modern Agricultural Industry Technology System CARS-48),Dawa 124200,Liaoning China)

机构地区：[1]盘锦光合蟹业有限公司,农业农村部中华绒螯蟹育种与繁养重点实验室,辽宁省河蟹专业技术创新中心,现代农业产业技术体系CARS-48,辽宁大洼124200

出　　处：《黑龙江水产》2024年第2期127-132,共6页Northern Chinese Fisheries

基　　金：国家重点研发计划项目“中华绒螯蟹、克氏原螯虾与螺蛳高效制繁种和绿色碳汇养殖示范课题(课题编号:2022YFD2400705)”。

摘　　要：为探究自然海水、井盐水混合自然海水两种水体下轮虫产量差别,提高轮虫的单产水平,找到限制轮虫产量的环境影响因子,试验选择盘锦光合蟹业有限公司三角洲基地12排5个自然海水轮虫池塘和18排5个自然海水与井盐水混合的轮虫池塘进行调查,井盐水的量占总量的比例≥50%,连续监测15 d水温、pH值的变化,定期测定水体的理化指标,包括碱度、盐度、钙离子,计算晶型CaCO_(3)·H_(2)O临界突变的饱和度指数,并跟踪记录各池轮虫总产量。结果显示,对比自然海水池塘,井盐水混合池塘更易发生水质突变,且突变次数明显增多,平均自然海水为0.4±0.49次,井盐水混合池塘为2.6±0.49次。井盐水混合池塘碱度普遍较高,平均(4.18±0.10)mmol/L,自然海水为(2.63±0.22)mmol/L。添加井盐水的池塘,轮虫产量显著低于正常轮虫池(P<0.01),平均每亩产量低25万kg左右。研究结果显示,在轮虫池大量混合井盐水会使水体突变增多,最终导致轮虫大量减产。In order to explore the difference in rotifer yield between natural seawater and well salt water mixed with natural seawater,improve the unit yield level of rotifer,and find the environmental impact factors that limit rotifer yield,12 rows of 5 natural seawater rotifer ponds and 18 rows of 5 natural seawater rotifer ponds mixed with well salt water were selected for investigation,and the proportion of well salt water accounted for≥50%of the total amount.The changes of water temperature and pH on 15 days were continuously monitored,the physical and chemical indexes of water bodies,including alkalinity,salinity and calcium ions,were regularly determined,the saturation index of critical mutation of crystalline CaCO_(3)·H_(2)O was calculated,and the total output of rotifers in each pool was tracked and recorded.The results showed that compared with natural seawater ponds,well salt water mixed ponds were more prone to water quality mutations,and the number of mutations increased significantly,with an average of 0.4±0.49 times in natural seawater and 2.6±0.49 times in well salt water mixed ponds.The alkalinity of the well salt water mixed pond was generally high,with an average of 4.18±0.10 mmol/L,and that of the natural seawater was 2.63±0.22 mmol/L.The yield of rotifer in ponds supplemented with well salt water was significantly lower than that in normal ponds(P<0.01),and the average yield per mu was about 250,000 kg lower.The results showed that mixing well salt water in the rotifer pond would increase the mutation of the water body and eventually lead to a large reduction of rotifer production.

关 键 词：井盐水 碳酸钙过饱和 水质突变 轮虫(Brachionus plicatilis) 

分 类 号：S912[农业科学—水产科学] S963.1