海水池塘底播江蓠对仿刺参生长的影响研究

Effects of Sowing Seaweed Gracilaria lichevoides on Growth of Sea Cucumber Apostichopus japonicus in a Seawater Pond

大型藻类在多营养层次综合养殖系统中的食物产出和生态调控功能显著,为研究底播菊花江蓠对仿刺参生长的影响效果,在中试池塘(0.1hm^(2))进行仿刺参1个投放密度[(100.0±23.6)g/m^(2)]和菊花江蓠4个投放密度[0、100、300、600g/m^(2)]的试验。结果显示:高温期间,底播菊花江蓠对池塘底层水温有降低的作用(P<0.05),对底层溶解氧含量有增加的作用(P<0.05),且有随着菊花江蓠投放密度的增大影响越来越大的趋势;仿刺参收获数量和质量随菊花江蓠投放密度的增大而增加,在此试验条件下对照组仿刺参生长和成活与各密度组均差异显著(P<0.05),各密度组的菊花江蓠自身生长差异不显著(P>0.05),对照组成活后仿刺参的生长与各密度组均差异显著(P<0.05),各密度组间差异不显著(P>0.05)。综合表明,池塘底播菊花江蓠能降低水温、增加溶解氧含量,可显著提高仿刺参的成活和生长,菊花江蓠投放密度为300~600g/m^(2)时,仿刺参成活和生长效果好。

The seaweed function as food for marine organisms and regulate the ecological environment in the multi-trophic level integrated culture system.In order to study the ecological polyculture technology of the sea cucumber Apostichopus japonicus and seaweed Gracilaria lichevoides sown at the bottom of seawater pond,the experiment was design as one stocking density(100.0±23.6)g/m^(2) for sea cucumber and 4 stocking density(0 g/m^(2),100 g/m^(2),300 g/m^(2),and 600 g/m^(2))for seaweed in pilot test pond(0.1 hm^(2)),respectively.The results showed that the G.lichevoides reduced the temperature and increased the dissolved oxygen(DO)level at the bottom of the seawater pond in the period of high temperature(P<0.05);meanwhile,the harvest quantity and quality of sea cucumber increased with the increase of the stocking density of seaweed.There were significant differences in growth and survival of sea cucumber between control and treatment groups(P<0.05).There was no obvious difference in the growth of seaweed in the treatment group(P>0.05).There was a significant difference between the growth of sea cucumber after survival in control group and the treatment group(P<0.05),without significant difference in the treatment groups(P>0.05).The experiments show that the seaweed can decrease the temperature and dissolved oxygen level,increase the survival and growth rate of the sea cucumber at the bottom of the seawater pond,the 300-600 g/m^(2) stocking density of the seaweed G.lichevoides is the suitable conditions for survival and growth of the sea cucumber.