论文部分内容阅读
近几年,刺参增养殖在我国沿海地区迅速发展,增养殖面积逐年扩大,苗种市场供不应求,因而给苗种生产企业带来巨大商机。但是,许多育苗企业在刺参育苗、保苗生产过程中受桡足类及其他病害影响,产量不稳定, 有些甚至导致育苗、保苗失败。现将桡足类在刺参育苗、保苗过程中的危害及其防治措施总结如下,供大家参考。 1 桡足类大量产生的原因 1．1 不重视育苗用水的处理由于沙滤池滤水速度、滤水量与育苗用水不配套,有些育苗单位有意减少细沙层高
In recent years, the proliferation of sea cucumber growth in the rapid development of China’s coastal areas, by expanding the area of growing aquaculture, seed market in short supply, thus giving seedling enterprises a huge business opportunity. However, many seedling raising enterprises are affected by copepods and other diseases during the process of seedling and seedling raising and seedling preservation, and the yield is not stable, and some of them even lead to nursery and seedling failure. Now copepoda in the sea cucumber seedlings, seedlings in the process of harm and prevention measures summarized below, for your reference. 1 copepods produce a large number of reasons 1.1 do not attach importance to the treatment of seedling water as filter sand filter speed, water and seedling water is not complete, and some nursery units intends to reduce the fine sand layer height