对虾育苗用水综合处理技术

Technique of Comprehensive Water Treatment During Breeding Prawn

用物理、化学、生物和药物等方法综合系统地处理对虾育苗用水：1）澄清海水，用10-20mg／L生石灰调节酸碱度；2）在沉淀海水中泼洒沸石粉30-50mg／L，去除或降低总氨氮、亚硝酸氮等有害物质；3）用15-23mL／m^3 甲醛消毒海水，杀除海水病原体；4）用棉花、过滤袋双层过滤，减少微细悬浮物及有害生物；5）育苗池投放水质改良剂及有益微生物制剂，维持稳定良好的水质，确保幼体正常生长。结果：对虾出苗率提高30％-100％。

Physical, chemical, biological and pharmic methods which were used to treat the water for breeding prawn are： （1） Calcium oxide with 10-20 mg/L was the best concentration to clarify sea-water and adjust pH. （2） Zeolite powder with 30-50 mg/L was effective to remove and decrease harmful substances including ammonia-nitrogen, nitrite and remained chlorine in precipitated sea-water by above 70%. （3） Formaldehyde with 15-23 mg/L was able to sterilize sea-water, especially, to kill pathogens. （4） Cotton and double layer filter were used to filter sea-water to cut down large granules and pests, furthermore, to purify water quality. （5） Water-quality ameliorant and beneficial microbes were put in breeding pond, which were able to optimize and stabilize water quality. Survival rate of larval would increase by 30%-100% by means of this comprehensive water treatment technique.