珍珠龙胆石斑鱼高位养殖池塘氮磷动态及收支的研究
作者:
作者单位:

华南农业大学海洋学院,广州 510642

作者简介:

廖洪平,E-mail:1620144140@qq.com

通讯作者:

唐汇娟,E-mail:tanghj@scau.edu.cn

中图分类号:

S912

基金项目:

广东省重点研发计划项目(2019B020219003);中山市社会公益与基础研究项目(210729084039002)


Dynamics and budgets of nitrogen and phosphorus in higher-place ponds of gentian grouper
Author:
Affiliation:

College of Marine Sciences,South China Agricultural University,Guangzhou 510642,China

Fund Project:

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    摘要:

    为了揭示高位池养殖珍珠龙胆石斑鱼(Epinephelus lanceolatus ♂ × Epinephelus luscoguttatus ♀)氮磷的利用与收支情况,阐明其在养殖过程中水质的变化以及氮磷的来源和去向,对3个高位养殖池中的珍珠龙胆石斑鱼、池塘水、进排水以及投入的饲料进行了为期55 d的定期采样和分析。结果显示,(1)3个池塘养殖期间溶氧均值为8.64~9.55 mg/L;氨氮、亚硝酸盐、硝酸盐、磷酸盐均呈不规则波动,总氮和总磷的质量浓度分别在6.14~7.11和0.38~1.41 mg/L波动;(2)珍珠龙胆石斑鱼存活率高,增重率为96.0%~227%,饲料转化系数为0.55~0.90,对饲料氮和磷的利用率分别为47.0%~59.0%和52.0%~63.0%。(3)3个池塘在监测期间饲料氮输入占比为61%~66.8%,饲料磷输入占比为66.9%~71.0%。鱼体产出是池塘中氮磷输出的主要方式,占氮输出的43.0%~60.9%;占磷输出的45.0%~67.7%;其余部分氮磷分别以排水、底泥沉积和其他方式输出。结果表明,在珍珠龙胆石斑鱼高位养殖中,池塘氮磷含量较高,饲料氮磷输入是池塘中氮磷输入的主要方式,鱼体产出是池塘中氮磷输出的主要方式,其次为池塘养殖期间的换水排放,因此,需采取适当的方式对水产养殖水排放进行管理,才能尽可能地减少养殖尾水对附近水域的影响。

    Abstract:

    To study the utilization and budgets of nitrogen and phosphorus in higher-place aquaculture ponds of gentian grouper (Epinephelus lanceolatus ♂ × Epinephelus luscoguttatus ♀),and to illuminate the dynamics of water quality and the sources and fate of nitrogen and phosphorus,during 55 days of cultivation,fish,pond water,input and output water and feed were regularly sampled and analyzed in three higher-place ponds. The results showed that: (1) the average concentration of dissolved oxygen during culture was between 8.64 and 9.55 mg/L; Ammonia nitrogen,nitrite,nitrate and phosphate showed irregular fluctuation in the three ponds; The contents of total nitrogen and total phosphorus varied from 6.14 to 7.11 mg/L and 0.38 to 1.41 mg/L,indicating serious eutrophication of the aquaculture pond. (2) During the cultivation period,the survival rate of gentian grouper was high. The weight gain rate of fish and feed conversion ranged from 96.0% to 227.0% and 0.55 to 0.90. The utilization rates of feed nitrogen and phosphorus were 47.0%-59.0% and 52.0%-63.0%,respectively. (3) Feed accounted for 61.0%-66.8% of total nitrogen input and 66.9%-71.0% of total phosphorus input. Fish harvest from the ponds accounted for 43.0%-60.9% of nitrogen output and 45.0%-67.7% of phosphorus output. The rest of the nitrogen and phosphorus were exported as drainage,sediment and other ways. The results of the study showed that higher-place aquaculture ponds of gentian grouper had high level nitrogen and phosphorus content, feed is the major way of nitrogen and phosphorus input to the pond and fish harvest is the major way of nitrogen and phosphorus output. The rest output was discharged through aquaculture effluents. Appropriate management of the waste water discharge in aquaculture is needed to decrease negative effect on nearby waterbody.

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廖洪平,张文琦,邓泳妍,刘培钦,唐汇娟.珍珠龙胆石斑鱼高位养殖池塘氮磷动态及收支的研究[J].华中农业大学学报,2023,42(1):92-99

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  • 收稿日期:2022-05-27
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  • 在线发布日期: 2023-02-22
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