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为探讨底泥扰动对池塘上覆水体水质的影响,利用底泥扰动装置提升池塘底部泥水混合物,检测池塘水体中总氮(TN)、溶解性总氮(DTN)、氨氮(NH3-N)、亚硝态氮(NO-2-N)和藻细胞密度,研究TN、DTN、NH3-N、NO-2-N与藻细胞密度之间的相关性。结果表明,随着扰动时间的增加,池塘水体中TN、DTN、NH3-N和NO-2-N均有不同程度的升高,与0 h相比,扰动累积时间54 h后,TN、DTN、NH3-N和NO-2-N分别提高了30%、220%、957%和32%;随着扰动时间的延长,池塘水体中藻细胞密度与DTN呈极显著正相关,与NO-2-N呈显著正相关;在光照条件下,底泥扰动能够加速池塘内物质循环,提高养殖水体的肥度和藻细胞密度。
In order to investigate the influence of sediment disturbance on the water quality of overlying water in ponds, the muddy water mixture at the bottom of the pond was raised by the sediment disturbance device to test the contents of total nitrogen (TN), dissolved total nitrogen (DTN), ammonia nitrogen (NH3-N) Nitrite nitrogen (NO-2-N) and algal cell density, the correlation between TN, DTN, NH3-N, NO-2-N and algal cell density was studied. The results showed that TN, DTN, NH3-N and NO-2-N in pond water all increased to different extents with the increase of disturbance time. Compared with 0 h, TN, DTN , NH3-N and NO-2-N increased 30%, 220%, 957% and 32% respectively. With the extension of disturbance time, the density of algal cells in pond water had a significant positive correlation with DTN, -N. Under the light conditions, sediment disturbance could accelerate the material circulation in the pond and increase the fertility and algae cell density of the cultured water body.