虾塘残饵腐解对养殖环境影响的研究Ⅰ. 虾塘底层残饵腐解对水质环境的影响

Study on the effects of decomposition of the bait in shrimp pond on the maricultural environment Ⅰ. Effect of decomposition of the bottom bait in shrimp pond on water environment

通过室内模拟实验，研究了虾塘底层残饵腐解对虾池水质的影响和更换虾池海水后底层水质质量的变化和清除覆盖于池底的残饵后池底底层水质的变化。结果表明，由于池底残饵的腐解，使虾池水质变坏， Ｄ Ｏ降至零，ｐ Ｈ 下降至６０ ，达不到生物存活的水平。更换虾池海水后，池底水质仍然受到一定的影响。清除池底残饵后，由于沉积物的吸附作用，大量硫化物又释放出来，仍然严重影响虾池的水质质量。数据表明，在养虾过程中应尽量减少虾饵的残留量并做到每年彻底清洁池底。

Through the simulate experiment, the studies on the eeffects of decomposition of the bait in a shrimp pond on the water quality, changes of the water quality after the replacement of the seawater and after the removal of the remain bait coved the pond bottom were done. The results shown that because of decomposition of the bait on the pond bottom, the water quality has deteriorated, DO reduced to zaro and pH dropped to 6 0, unreaching the alive level for the shrimp. The water quality on the pond bottom was impacted still after the replace of seawater, and the removal of the bait, because of adsorption of the sediment, sulphide released from the sediment. The data indicated that thd remain bait on the pond bottom should be minimized as possible and the shrimp pond must be cleaned up every year after the cultural finish, reaching the environment standard for the clean culture.