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Nitrogen and Phosphorus Turnover and Coupling in Ponds with Different Aquaculture Species by Dong Bai; Xiaowen Li; Zhenghan Liu; Lingling Wan; Chunlei Song; Yiyong Zhou; Xiuyun Cao is a Agricultural and Biological Sciences article available to read on EtoBox.

What is Nitrogen and Phosphorus Turnover and Coupling in Ponds with Different Aquaculture Species about?

Massive accumulation of nitrogen (N) and phosphorus (P) is the serious problem for development of pond aquaculture. Several efforts have been paid to reduce negative effects of nutrient accumulation. However, little is known about the internal cycling process of N and P in traditional aquaculture ponds. In this study, we determined the kinetic parameters of critical extracellular enzymes (including alkaline phosphatase (AP) and leucine aminopeptidase (LAP)) involved in N and P cycling and variations of trophic states in three kinds of ponds with typical cultured species (fish, crab, and crayfish) around Lake Honghu in four months of different seasons from 2019 to 2020. Additionally, sediment P release potential was assessed meanwhile. Results indicated that trophic state in the ponds was cultural species specific. In fish ponds, soluble reactive phosphorus (SRP) was the major component of the total phosphorus (TP). Accumulation of P and imbalance of N and P ratio occurred due to exogenous inputs. Meanwhile, the concentrations of ammonium and nitrite were also the highest in the fish ponds, reaching 4.14 mg L−1 and 0.29 mg L−1 respectively. Enzymatic kinetic parameters were used to

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Author

Dong Bai; Xiaowen Li; Zhenghan Liu; Lingling Wan; Chunlei Song; Yiyong Zhou; Xiuyun Cao

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Agricultural and Biological Sciences (Life Sciences)