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海水养殖封闭性水体缺氧状态的初步探讨
陈佳荣¹, 吴友义¹
厦门水产学院

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PRELIMINARY STUDIES ON OXYGEN-DEFICIENCY IN THE ENCLOSED SEAWATER BODIES FOR AQUACULTURE

Abstract:

Oxygen-deficient condition, variation of water quality and elimination of oxygen-deficient condition during the breeding season of prawns and horseshoe crabs arc studied. Along of the disappearance of D.O., the consumption of NO₃^- and NO₂^- and the gradual accumulation of NH₃, H₂S appeared rapidly about 62 hours later. Rather slow was the natural renewal speed of oxygen-deficient condition in the static water bodies. However, with an initial concentration of 1.34mg S^2-/L and 3.18mg O2/L in seawater bodies, the reaction was of first order with respect to S^2- and had a specific rate constant of 0.04/min. at 27℃ and pH 7.9 (S = 25.7‰) , the half-life period was about 20 min.

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