摘要
为查明旅顺地区刺参养殖池塘周年水温变化规律,对3 口管理方式相同且相邻的刺参养殖池塘水温开展了为期一年的观测.结果表明:刺参养殖池塘表、底层水温周年内均随气温变化而变化;垂向分布上,3月底层水温显著高于表层水温,春季白天表层水温显著高于底层水温,夏季80～120 cm水层水温显著低于其他水层水温,秋、冬两季各水层水温无显著差异;同时,对各季节溶氧、盐度的垂向分布观测发现,春、夏两季表层溶氧全天显著高于底层,夏季表层盐度全天显著低于底层.调查结果初步表明,春季化冰期至夏季高温期旅顺地区刺参养殖池塘易出现水体分层,对刺参养殖生产不利,应在自然换水的基础上,延长增氧机工作时间以促进水体交换,有条件的养殖户也可安装表、底层水质在线监测设备,在水体具有分层发展趋势时及时开启增氧机.
Abstract
In order to find out the annual water temperature change of sea cucumber breeding ponds in Lushun,three adjacent sea cucumber breeding ponds with the same management method were observed for one year.The results showed that the surface and bottom water temperatures of sea cucumber ponds changed with air temperature during the year.In vertical distribution,the bottom water temper-ature in March was significantly higher than the surface water temperature,and the surface water tem-perature during the day in spring was significantly higher than that of the bottom water.The water temperature at 80-120 cm depth was significantly lower than that of other water layers in summer,and there was no significant difference in the water temperature each water layer in autumn and winter.At the same time,the observation of the vertical distribution of dissolved oxygen and salinity each season showed that the surface dissolved oxygen in spring and summer is significantly higher than that of the bottom layer,and the surface salinity in summer is significantly lower than that of the bottom layer.The survey results preliminarily showed that sea cucumber breeding ponds in Lushun are prone to strat-ify from the spring ice period to the summer high temperature period,which is unfavorable for sea cu-cumber aquaculture production.Farmers should extend the working hours of aerators to promote water exchange on the basis of natural water exchange.Farmers can also install on-line monitoring equipment for surface and bottom water quality,and start aerators in time when the water has a layered develop-ment trend.
基金项目
辽宁省科学计划项目(2018104009)
辽宁省"兴辽英才"项目(XLYC1808029)
大连市2020年度科技特派团项目()
大连市重点领域创新团队支持计划项目(2019RT11)
大连市第二批领军人才项目()
NETL
NSTL
万方数据