黑龙江省地处寒温带,是东北三省最冷的省份,冰封期长达160余天,冰厚80—100cm,所以保证鱼类安全越冬是北方渔业生产的一个重要环节。鱼类在越冬期死亡原因是多方面的,有一种原因引起的,也有多种因素综合作用引起的。上世纪八十年代初提出的生物增氧越冬技术得到推广普及,越冬成 Heilongjiang Province is located in the frigid and temperate zone. It is the coldest province in the three northeastern provinces. With a frozen period of more than 160 days and an ice thickness of 80-100cm, ensuring the safety of fish overwintering is an important part of the fishery production in the north. There are many reasons for the death of fish during the wintering period, which is caused by one kind of reason and also caused by the combination of many kinds of factors. The bio-oxygenation overwintering technique put forward in the early 1980s has been popularized and popularized