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
作者: Li Junwei 1 ; Dong Shuanglin 1 ; Gao Qinfeng 1 ; Zhu Changbo 2 ;
作者机构: 1.Ocean Univ China, Minist Educ China, Key Lab Mariculture, Qingdao 266003, Peoples R China
2.Chinese Acad Fishery Sci, South China Sea Fisheries Res Inst, Minist Agr China, Key Lab South China Sea Fishery Resources Exploit, Guangzhou 510300, Guangdong, Peoples R China
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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