水生生物学报2024，Vol.48Issue(5)：734-743,10.DOI:10.7541/2024.2023.0289
工程化循环水养殖池塘的氮磷收支研究
NITROGEN AND PHOSPHORUS BUDGET IN ENGINEERED RECIRCULATING AQUACULTURE POND
摘要
Abstract
The intensive aquaculture-induced environmental pollution has impeded the sustainable and healthful progression of the aquaculture industry.In order to explore a more sustainable and efficient aquaculture model,we enhanced the circulating aquaculture system in freshwater ponds in this study.The physicochemical indexes and nitro-gen and phosphorus budget of ponds were analyzed during the 5-month experiment period.The results showed fluctuat-ing changes in the physicochemical indexes of pond water,with total nitrogen and total phosphorus concentrations measuring 4.85 and 1.04 mg/L,respectively,at the end of the experiment.Notably,the total nitrogen concentrations met the secondary standards for freshwater aquaculture tailwater discharge.Feed and sediment emerged as principal contributors to nitrogen and phosphorus input,accounting for 50.6％and 43.7％of nitrogen input and 49.4％and 46.9％of phosphorus input,respectively.Sediment accumulation emerged as the primary mechanism for nitrogen and phos-phorus output in ponds,accounting for 53.3％and 78.7％of nitrogen and phosphorus output,respectively.The nitrogen and phosphorus utilization rates in experimental ponds were determined to be 65.2％and 16.6％,respectively.The utilization rate of nitrogen and phosphorus of carp(Cyprinus carpio)were significantly higher than those of other fish(P＜0.05).However,there was no significant difference in the phosphorus utilization rate between silver carp(Hypophythalmichthys molitrix)and bighead carp(Aristichthys nobilis)(P＞0.05).The research shows that the enhanced pond circulation aquaculture system can effectively mitigate nutrient load,enhance the nitrogen and phosphorus utiliza-tion rate of aquaculture organisms,diminish the impact of aquaculture tailwater on the surrounding environment,and concurrently consider ecological and economic benefits.It represents a low cost,environmentally friendly,and health-ful pond aquaculture model.关键词
循环水养殖/氮磷收支/氮磷利用率/养殖尾水Key words
Recirculating aquaculture/Nitrogen and phosphorus budget/Nitrogen and phosphorus utilization rate/Aquaculture tail water分类
农业科技引用本文复制引用
张家赫,许世玲,左妍,张立坤,李瑞红,郭文飞,吴彦,赵春龙,于佳..工程化循环水养殖池塘的氮磷收支研究[J].水生生物学报,2024,48(5):734-743,10.基金项目
河北省自然科学基金青年基金(C2023204059) （C2023204059）
巢湖生物资源调查及生态修复示范工程(基础调查研究部分)(2020-340181-77-01-037328) （基础调查研究部分）
河北农业大学引进人才科研专项(YJ2020026)资助[Supported by Hebei Natural Science Foundation Youth Foundation （YJ2020026）
Chaohu Lake Biological Resources Survey and Ecological Restoration Demonstration Project(Basic Investigation and Research Part)(2020-340181-77-01-037328) （Basic Investigation and Research Part）
Hebei Agricultural University Talent Introduction Research Project(YJ2020026)] （YJ2020026）
