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在水温7.0~19.5℃和盐度28.7~30.9的养殖环境下,将仿刺参(Apostichopus japonicus)和海黍子(Sargassum muticum)混养在1 m3水体中,研究在一定养殖空间内刺参-海黍子适宜的养殖容量和密度及其对水质的影响。仿刺参平均湿重(25.2±1.21)g;养殖密度,A1~A3组:600 g/m3,B4~B6组:400 g/m3,C7~C9组:200 g/m3。海黍子养殖密度,A1、B4、C7组:0 g/m3,A2、B5、C8组:1 000 g/m3,A3、B6、C9组:2 000g/m3。结果显示:(1)A1、B4组仿刺参的平均日增重率(Mdwg)和特定生长率(SGR)最小;C8和C9组仿刺参的Mdwg和SGR最大;A2组海黍子的SGR最大;C9组海黍子SGR最小;(2)A1、B4组NH4+-N、NO2--N、NO3--N和PO43--P含量较高;A3、B6、C9组各营养因子含量较低。研究表明:海黍子能吸收水体中的营养因子,其密度显著影响仿刺参的生长(P<0.05)。本试验条件下,C8、C9组搭配比较合适,生态互利效果最好。
Apostichopus japonicus and Sargassum muticum were mixed in 1 m3 of water at a water temperature of 7.0-19.5 ℃ and a salinity of 28.7-30.9 to study the effects of sea cucumber stichopus japonicus - Sea millet suitable culture capacity and density and its impact on water quality. The average wet weight of sea cucumber (25.2 ± 1.21) g was the same as that of sea cucumber. The stocking density was 600 g / m3 for A1 ~ A3 group, 400 g / m3 for B4 ~ B6 group and 200 g / m3 for C7 ~ C9 group. Sea millet farming density, A1, B4, C7 group: 0 g / m3, A2, B5, C8 group: 1000g / m3, A3, B6, C9 group: 2 000g / m3. The results showed that: (1) The average daily rate of increase (Mdwg) and specific growth rate (SGR) of A. glabra were the lowest in groups A1 and B4; the Mdwg and SGR were the highest in the groups C and C9; SGR was the largest; the SGR was the lowest in C9 group; (2) the content of NH4 + -N, NO2 - N, NO3 - N and PO43 - P in A1 and B4 was higher; the content of trophic factors in groups A3, B6 and C9 Lower. Studies have shown that: sea millet can absorb nutrients in water, its density significantly affect the growth of imitation sea cucumber (P <0.05). Under the experimental conditions, C8, C9 group with more appropriate, ecological mutual benefit the best.