| 摘要: |
| 利用室内装置模拟的刺参养殖池塘上覆水, 在温度为25℃, 光照为(4000±200)lx条件下静态培养刚毛藻48h, 定时测定上覆水中总氮(TN)、氨态氮(NH4+-N)、硝态氮(NO3--N)、亚硝态氮(NO2--N)、总磷(TP)、活性磷(PO43--P)等营养盐含量, 分析了氮磷营养盐含量的动态变化规律, 探讨了刚毛藻生物量对沉积物-水界面营养盐含量变化的影响。结果表明, 刚毛藻生物量对各营养盐含量的影响存在显著性差异(P<0.05)。随着培养时间延长, 上覆水中营养盐含量均呈现先增大后减小的趋势。上覆水中各营养盐含量在培养6～24 h时分别达到最大值, 其中当刚毛藻生物量为0.5～4.5 g/L时, TN、NO3--N、NO2--N、NH4+-N、TP、PO43--P含量达到最大值。继续培养, 上覆水中各营养盐的含量逐渐减小, 其中生物量为8.5 g/L时刚毛藻对NO3--N、NO2--N的吸收效果最好; 生物量为0.5 g/L时刚毛藻对NH4+-N、PO43--P吸收效果最好。因此, 高生物量(8.5 g/L)刚毛藻可降低上覆水中NO3--N、NO3--N含量, 但低生物量(0.5 g/L)刚毛藻能有效吸收上覆水中的NH4+-N、PO43--P。 |
| 关键词: 刺参养殖池塘 刚毛藻 沉积物-水 营养盐 |
| DOI：10.11759/hykx20170820001 |
| 分类号: |
| 基金项目:国家自然科学基金项目(31572622, 31001113) |
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| Effect of Cladophora sp. on the content of nutrient in sedimentwater interface from the pond breeding of Apostichopus japonicus |
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CAO Xue-bin,MA Wei-wei,LI Qi,WU Chun-mei,WU Cai-mi,JIANG Ai-li,XING Rong-lian
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| Abstract: |
| To study the effect of Cladophora sp. on the nutrient in sediment-water interface, laboratory static culture was conducted. The temperature was 25℃, light intensity was (4000±200)lx. The content of total nitrogen (TN), ammonia nitrogen (NH4+-N), nitrate (NO3--N), nitrite nitrogen (NO2--N), total phosphorus (TP), reactive phosphorus (PO43--P) in the overlying water was measured periodically. The main results were given as follows: There were significant differences between the nutrient content caused by the biomass of Cladophora sp. (P<0.05), and their content increased first and decreased with a peak in 6～24 h. The maximum concentration of TN, NO3--N, NO2--N, NH4+-N, TP, PO43--P was that the amount of algae was 0.5～4.5 g/L. The content of each nutrient gradually decreased, and reached the minimum value when the culture time was more than 24 h. When the biomass was 8.5 g/L, the absorption of NO3--N and NO2--N was the best; the biomass of 0.5 g/L was the best for the absorption of NH4+-N and PO43--P. Therefore, high biomass (8.5 g/L) Cladophora sp. can reduce NO3--N and NO2--N content in overlying water, but low biomass (0.5 g/L) Cladophora sp. can effectively absorb NH4+-N and PO43--P in overlying water. |
| Key words: the pond breeding of Apostichopus japonicus Cladophora sp. sediment-water nutritive salt |
