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北方高寒地区,气候寒冷,冰封期长,鱼类越冬长达4～5个月,鱼类越冬管理难度相对较大。在鱼类越冬管理上,需要做好以下工作。 一、勤测氧,注意冰下水体的溶氧变化情况 测氧有助于了解冰下水体溶氧变化情况,以便及时采取应对措施。目前,测氧多采用化学试剂测氧法,这种方法比
In the alpine region of the north, the climate is cold and the ice period lasts long, and the fishes overwinter for 4 to 5 months. The management of fish overwintering is relatively more difficult. In the winter management of fish, need to do the following work. First, diligent measurement of oxygen, pay attention to changes in dissolved oxygen in the water under ice Oxygen helps to understand changes in the dissolved oxygen in water in order to take timely measures to deal with. At present, more oxygen measured by chemical reagent oxygen method, this method than