Nitrogen and phosphorus budget of a polyculture system of sea cucumber (Apostichopus japonicus), jellyfish (Rhopilema esculenta) and shrimp (Fenneropenaeus chinensis)

文献类型： 外文期刊

第一作者： Li Junwei

作者： Li Junwei;Dong Shuanglin;Gao Qinfeng;Li Junwei;Zhu Changbo

作者机构：

关键词： polyculture;nitrogen budget;phosphorus budget;Apostichopus japonicus;Rhopilema esculenta;Fenneropenaeus chinensis

期刊名称：JOURNAL OF OCEAN UNIVERSITY OF CHINA （ 影响因子：0.913； 五年影响因子：1.012 ）

ISSN： 1672-5182

年卷期： 2014 年 13 卷 3 期

页码：

收录情况： SCI

摘要： The nitrogen (N) and phosphorus (P) budget and the ecological efficiency of a polyculture system of sea cucumber (Apostichopus japonicus), jellyfish (Rhopilema esculenta) and shrimp (Fenneropenaeus chinensis) were studied in a cofferdam, 120.2 ha in size. The nutrients were supplied by spring tide inflow. In total, 139600 kg N yr(-1) and 9730 kg P yr(-1) input to the system; while 118900 kg N yr(-1) and 2840 kg P yr(-1) outflowed from the system concurrently, thus the outflow was 85.7% (N) and 29.2% (P) of inflow. The production of N and P was 889.5 kg yr(-1) and 49.28 kg yr(-1) (sea cucumber) and 204 kg yr(-1) and 18.03 kg yr(-1) (jellyfish and shrimp), respectively. The utilization rate of N and P by polycultured animals was 7.8aEuro degrees and 6.9aEuro degrees, respectively, 21.9% and 38% higher than that of monocultured sea cucumber. Our results indicated that the polyculture system was an efficient culture system of animals and a remediation system of coastal environment as well; it scavenged 14.3% and 70.8% of N and P, respectively. Such an ecological efficiency may be improved further by increasing either the stocking density or the size of sea cucumber or both.

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