环境因子对鱼饵中磷释放影响的实验研究

Study on effect of environmental factors upon release of phosphorus in fish bait

通过室内模拟实验,分析了环境因子(上覆水、微生物活动、温度、pH、水动力条件)对鱼饵磷释放特征的影响及原因。结果表明:鱼饵在去离子水中总磷和正磷酸盐的平衡释放量约是潘家口水库水中的1.58倍和1.76倍;微生物作用有利于鱼饵中磷向水体释放,前者总磷和正磷酸盐的释放量约为后者的1.55倍和1.28倍;温度升高和水体扰动促进了鱼饵中磷的释放;酸性和碱性条件下鱼饵中磷的释放量高于中性条件下鱼饵中磷的释放量。各环境因子作用下,鱼饵中磷在前3h内的释放速率最大。

Effects of environmental factors,such as overlying water types,microorganism activities,temperature,pH and hydrodynamic conditions upon release of phosphorus in fish bait were experimentally investigated.The results showed that： the contents of total phosphorus and orthophosphate released from bait in deionized water were about 1.58 and 1.76 times respectively equal to those in water of Panjiakou Reservoir.The action of microorganism was in favor of releasing phosphorus in fish bait,and the contents of total phosphorus and orthophosphate with microorganism were about 1.55 and 1.28 times respectively equal to those without microorganism.Also higher temperature and disturbance were helpful to the phosphorus release.The fish bait released more phosphorus under alkaline or acidic conditions compared to the neutral condition.Under various environmental factors,the maximum rate of phosphorus release was achieved at the beginning 3 hours.