论文部分内容阅读
分别用背角无齿蚌和鲢鳙鱼对中华鲟养殖池水体进行的生态修复比较试验结果表明,氨氮浓度维持在0.50mg-L~(-1)左右,受背角无齿蚌、鲢鳙鱼影响不明显。背角无齿蚌对总磷消除较明显,但对总氮的去除效果不显著。混养鲢鳙鱼的3号中华鲟养殖池的总氮和总磷去除率大于挂养背角无齿蚌的2号中华鲟养殖池。不同处理中华鲟养殖池总悬浮物、氨氮、总氮、总磷浓度的相关分析显示:悬浮物在氮的净化过程中起到一定作用,而磷的净化与悬浮物无明显相关。在总悬浮物浓度较高的中华鲟养殖池中放养鲢鳙鱼的生态修复效果优于背角无齿蚌。
The results of comparison of the ecological restoration of water body of Chinese sturgeon using the anodonta and silver carp and bighead carp showed that the concentration of ammonia nitrogen remained at about 0.50 mg-L -1, The effect of fish is not obvious. Anodontia japonicus can eliminate total phosphorus more obviously, but the removal of total nitrogen is not significant. The total nitrogen removal rate and total phosphorus removal rate of Chinese sturgeon breeding pond No.3 of polyculture silver carp and bighead carp were higher than those of Chinese sturgeon breeding pond No. 2 of Anodonta harpinii. The correlation analysis of total suspended solids, ammonia nitrogen, total nitrogen and total phosphorus in different treatments of Chinese sturgeon breeding ponds showed that the suspended matters play a role in the purification of nitrogen, while the purification of phosphorus has no obvious correlation with suspended solids. The ecological restoration of silver carp and bighead carp in Chinese sturgeon culture pond with higher total suspended matter concentration was superior to that of the anodonta wood.