骨条藻生产性培育池亚硝酸态氮含量的变化及其藻液的处理

Changes of the Content of Nitrite Nitrogen in the Commercial Raising Ponds of Skeletonema and the Treatment of the Liquid of Algae

骨条藻是投喂对虾溞状幼体的优质饵料,在骨条藻的培育过程中,由于施肥和骨条藻生理代谢的结果,使藻液含有较多量的有毒物质,其中亚硝酸态氮素含量的变化是比较明显的。然而 NO_2-N 对对虾幼体的毒性是比较大的,因此掌握骨条藻培育池水NO_2-N 含量的变化规律,在投喂之前严格处理藻液则可以有效地避免 NO_2-N 对虾苗的毒性,提高溞状幼体期虾苗的成活率。笔者于1988～1989年先后在深圳、湛江、海康等地骨条藻生产性培育中,对其生产性池NO_2-N 的含量变化进行了多方面的测定,现将其结果报告于后。

Skeletonema is a kind of fine food for feeding the zoea larva ofprawn,but due to the fertilizing and metabolism of physiology,itcontains large quantity of poisonus material during the course ofraising.The paper deals with the changes of the nitrite nitrogen inthe commercial raising ponds of skeletonema and the treatment of theliquid of algae.