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    BI Ying zuo 1,LI GUI feng 1,LI Hai yan 2,CHENG Ying ji 1,LIN Lu cheng 1. Changing Pattern of Nitrite-Nitrogen and Ammonia-Nitrogen in Nursery Tank Water of the Freshwater Prawn (Macrobrachium rosenbergii) and Effect on the Larvae[J]. Journal of South China Agricultural University, 2002, 23(3): 67-70. DOI: 10.7671/j.issn.1001-411X.2002.03.019
    Citation: BI Ying zuo 1,LI GUI feng 1,LI Hai yan 2,CHENG Ying ji 1,LIN Lu cheng 1. Changing Pattern of Nitrite-Nitrogen and Ammonia-Nitrogen in Nursery Tank Water of the Freshwater Prawn (Macrobrachium rosenbergii) and Effect on the Larvae[J]. Journal of South China Agricultural University, 2002, 23(3): 67-70. DOI: 10.7671/j.issn.1001-411X.2002.03.019
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    Changing Pattern of Nitrite-Nitrogen and Ammonia-Nitrogen in Nursery Tank Water of the Freshwater Prawn (Macrobrachium rosenbergii) and Effect on the Larvae

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    • The paper deals with the effect of ammonia-nitrogen (NH 3-N t) and nitrite-nitrogen (NO - 2-N) in the nursery water on the larvae of Macrobrachium rosenbergii , in which the concentrations of NH 3-N t and NO - 2-N were tested. The result showed: when the concentration of ionized ammonia(NH 3-N m) exceeded to 0 11 mg/L over 6 days, larval metamorphosis would be delayed causing heavy larval mortality. Daily change in the concentration of NH 3-N t and NO - 2-N was irregular, but the concentration of NH 3-N t and NO - 2-N tended to increase gradually during nursery period.
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