溶解氧是养鱼池塘中影响鱼类生存和生长的主要因素之一。但长期以来,因测定池塘溶解氧的碘量法操作复杂和有些试剂较难配制而使许多基层养殖单位仍感测氧困难。为解决这一问题,黑龙江省农垦科学院水产试验站的科技人员在碘量法原理的基础上,依水样固定酸化后各种色阈与氧量的关系,绘制出一种水样固定酸化 Dissolved oxygen is one of the major factors affecting the survival and growth of fish in fish ponds. However, for a long time, many grass-roots aquaculture units still find it difficult to measure oxygen because of the complicated operation of iodometry to measure dissolved oxygen in ponds and the difficult preparation of some reagents. In order to solve this problem, based on the principle of iodometric method, the scientists and technicians of Fisheries Experimental Station of Heilongjiang Academy of Land Reclamation Sciences draw a fixed acidification of water sample according to the relationship between the various color thresholds and the amount of oxygen after fixed acidification