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新型水产养殖模式对池沉积物中吸附释放的影响

Juchen Xu¹, Jie Wang¹, Shen Lin¹

¹College of Fisheries, Huazhong Agricultural University, Wuhan 430070, China.

The Science of the total environment

|September 14, 2023

概括

新型水产养殖系统 (PTC) 与传统池 (TEP) 相比显示出不同的循环,由微生物群落驱动,影响营养管理和水质.

科学领域:

环境科学环境科学
水产养殖科学水产养殖科学
临界技术临界技术

背景情况:

水产养殖的演变带来了新的环境挑战,特别是关于营养循环.
关于新兴水产养殖系统中 (P) 吸附释放动态的研究有限.
了解这些过程对于可持续的水产养殖和水质管理至关重要.

研究的目的:

研究和比较传统土池 (TEP) 和池培养 (PTC) 模式之间的沉积物吸附释放特征和机制.
确定影响这些不同水产养殖系统动态的关键因素.
为优化新型水产养殖实践中的营养管理提供见解.

主要方法:

在TEP和PTC系统下对水和沉积物营养度进行比较分析.
评估沉积物的分数和有机物质含量.
微生物群体分析,包括识别P-溶解细菌和量化PphoD 基因.

主要成果:

虽然总营养度相似,但PTC与TEP相比,水中的P度呈现了不同的时间趋势,影响了沉积物P吸附释放.
结合的P和热NaOH可提取的有机P被确定为影响吸附释放的活性P分量.
与TEP相比,PTC显示有机P-溶解细菌 (Bacteroidia类) 和 `phoD`基因表达的丰度更高,而TEP主要由无机P-溶解细菌 (Actinobacteria,Bacilli) 主导.

结论:

微生物群落的组成显著影响了不同水产养殖模式中的吸附释放行为.
在TEP和PTC之间微生物P循环机制的差异是沉积物P动态的关键驱动因素.
这些发现对现代水产养殖中的水质和污染控制策略有宝贵的影响.

关键词:

内源性污染是一种内源性污染.设施水产养殖水产养殖营养物质负载是什么释放可以释放.

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The Phosphorus Cycle

The Phosphorus Cycle

Unlike carbon, water, and nitrogen, phosphorus is not present in the atmosphere as a gas. Instead, most phosphorus in the ecosystem exists as compounds, such as phosphate ions (PO43-), found in soil, water, sediment and rocks. Phosphorus is often a limiting nutrient (i.e., in short supply). Consequently, phosphorus is added to most agricultural fertilizers, which can cause environmental problems related to runoff in aquatic ecosystems.

Factors Affecting Solubility

Factors Affecting Solubility

Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution of the ionic compound). This is an example of a phenomenon known as the common ion effect, which is a consequence of the law of mass action that may be explained using Le Chȃtelier’s principle. Consider the dissolution of silver iodide: