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北方地区冬季气候严寒,冰冻层厚,鱼类越冬期长,许多小型水库由于管理不当常发生死鱼现象,特别是春节前后,更为严重。究其原因,主要的是由于水中缺氧而引起的。为了保证鱼类安全越冬,水库管理人员应经常掌握水中溶氧情况。每年一、二月份,有条件的单位应做到3天测一次库水溶氧量,如发现溶氧低于4毫克/升,可采取以下措施进行增氧。一、引用泉水增氧。用此方法应注意以下两个问题: 1.泉水入库应经过5～7米的流程,有利于泉水中CO_2与SO_2等
In the northern part of the country, the cold climate in winter, the thick frozen layer and the overwintering period of fish are long. Many small reservoirs often have dead fish due to improper management, especially before and after the Spring Festival. The reason, the main reason is due to lack of water in the water caused. In order to ensure the safety of fish overwintering, reservoir managers should always know the situation of dissolved oxygen in water. In January and February each year, a qualified unit shall measure the dissolved oxygen level of the reservoir water in 3 days. If dissolved oxygen is found to be less than 4 mg / l, the following measures may be taken to add oxygen. First, the reference spring water oxygen. With this method should pay attention to the following two questions: 1 spring storage should go through 5 to 7 meters of the process is conducive to spring water CO_2 and SO_2