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目前盐碱地池塘养鱼已在国内盐碱地区普遍开展。由于盐碱地池塘的生态环境复杂,因而池水水质、水量、矿化度和各种阴、阳离子变化剧烈。同时水体年平均含盐量高达5.98克/升,鱼病时常发生,尤其是小三毛金藻(Prymnesium parunm Carter)经常泛滥,给渔业生产带来严重损失。据不完全统计,由该藻引起鱼类中毒死亡的直接经济损失近年来在辽宁、宁夏、内蒙古、河北、天津、山西、陕西等地区共达100万元以上。为此我们对这种害藻的防治进行了研究,现将我们的防治技术小结如下:
Saline alkaline pond fish farming in the domestic saline-alkali areas are generally carried out. Due to the complex ecological environment of the saline-alkali pond, the water quality, the amount of water, the degree of salinity and various kinds of anion and cation changes drastically. At the same time, the average annual salinity of water body reaches as high as 5.98 g / l, fish diseases occur frequently, especially the Prymnesium parunm Carter frequently flooding, causing serious losses to fishery production. According to incomplete statistics, the direct economic loss caused by the algae causing fish poisoning in recent years has reached over 1 million yuan in Liaoning, Ningxia, Inner Mongolia, Hebei, Tianjin, Shanxi and Shaanxi. To this end we have conducted a study on the prevention and control of this harmful algae. Now we summarize the prevention and treatment technologies as follows: