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Influence of eco-substrate addition on organic carbon, nitrogen and phosphorus budgets of intensive aquaculture ponds of the Pearl River, China

文献类型：外文期刊

第一作者： Zhang, Kai

作者： Zhang, Kai;Yu, Deguang;Li, Zhifei;Xie, Jun;Wang, Guangjun;Gong, Wangbao;Yu, Ermeng;Tian, Jingjing

作者机构：

关键词： Eco-substrate; Organic carbon; Nitrogen; Phosphorus budgets; Aquaculture ponds

期刊名称：AQUACULTURE （影响因子：4.242；五年影响因子：4.723 ）

ISSN： 0044-8486

年卷期： 2020 年 520 卷

页码：

收录情况： SCI

摘要： Eco-substrates were developed to control pollution created in pond-based intensive aquaculture. In this study, organic carbon, nitrogen, and phosphorus budgets and concentrations were quantified to determine if restoring eco-substrate is an effective method to reverse the effects of pollution. The experiment was performed in 1.0 hm(2) ponds with and without the addition of eco-substrate, i.e. treatment and control groups, respectively. Results showed that eco-substrate significantly reduced ammonia nitrogen, nitrate nitrogen, total organic carbon, total nitrogen, and total phosphorus in the water of intensive aquaculture ponds (P < .05). The water accumulation of organic carbon, nitrogen, and phosphorus in the treatment group was significantly lower than that in the control group water (P < .05), as was the sediment accumulation of organic carbon and nitrogen (P < .05); no significant difference was found in the sediment accumulation of phosphorus (P > .05). The utilization efficiency of organic carbon, nitrogen, and phosphorus of the eco-substrate group was significantly higher than that of the control group (P < .05). Therefore, eco-substrate could significantly improve water quality, reduce nutrient accumulation, and improve the utilization efficiency of nutrients. Nonetheless, China's large aquaculture industry emits 4.19 x 10(5) tons of organic carbon, 2.79 x 10(5) tons of nitrogen, and 2.89 x 10(4) tons of phosphorus annually. Thus, additional studies are necessary to improve treatment methods for large-scale aquaculture effluents.

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