北方海参养殖多为潮间带和虾池造礁的露天养殖,许多养殖户存在冬季气温低、海参不用管理的观念,导致许多海参的死亡。从近几年了解的情况看,养殖海参大面积发病的时间基本相同,山东地区多在2月中旬～5月上旬,集中在3～4月。这期间的重要变化因素是气温和水温从严寒的冬季低温期逐步回升,但气温和水温的 Northern sea cucumber cultivation is mostly open-air breeding of intertidal and shrimp pond reefs. Many farmers have the concept of low winter temperatures and uncontrolled sea cucumbers, resulting in the death of many sea cucumbers. From the situation in recent years to understand, the incidence of large-scale cultivation of sea cucumber time is basically the same, mostly in Shandong in mid-February to early May, concentrated in March to April. An important change during this period is the gradual recovery of temperature and water temperature from the cold winter low temperature, but the temperature and water temperature