PSE Community.org

LAPSE:2023.1096

The Hormetic Response of Soil P Extraction Induced by Low-Molecular-Weight Organic Acids

Kuan Zhao, Cong Wang, Xin Xiao, Ming Li, Wenrui Zhao, Yixuan Wang, Yang Yang

February 21, 2023

Abstract
The hormetic effect is a toxicological phenomenon in the soil ecosystem. The influence of low-molecular-weight organic acids (LMWOAs) on the release and activation of soil phosphorus (P) has become the focus of toxicological research. To what extent LMWOAs can regulate the hormetic effect of P release and then influence soil P nutrients is worth attention. This study aimed to investigate the effects of different types and concentrations of exogenous LMWOAs on P extraction, establish the relationship between the concentration of LMWOAs and P extraction efficiency, and calculate the hormetic parameters to understand the mechanism of types and concentrations of LMWOAs in P extraction efficiency. Four organic acids, i.e., citric, oxalic, tartaric, and malic acids, induced hormetic effects on P extraction that were concentration dependent. The relationship between LMWOAs and P extraction efficiency was explained by a quadratic polynomial equation. The critical threshold of citric acid concentration was similar to that of oxalic acid, whereas that of tartaric acid was similar to that of malic acid. The critical thresholds of the P concentration extracted by malic acid and citric acid were higher than those extracted by oxalic acid and tartaric acid due to the differences in the structure and properties of LMWOAs. The critical thresholds of P extraction efficiency of oxalic acid were lower than those of the other three organic acid types. These results provide evidence for the use of citric acid and malic acid to increase soil P.

Record ID

LAPSE:2023.1096

Keywords

available phosphorus, critical thresholds, hormetic effect, low-molecular-weight organic acids, soil

Subject

Environment

Suggested Citation

Zhao K, Wang C, Xiao X, Li M, Zhao W, Wang Y, Yang Y. The Hormetic Response of Soil P Extraction Induced by Low-Molecular-Weight Organic Acids. (2023). LAPSE:2023.1096

Author Affiliations

Zhao K: Key Laboratory of Aqueous Environment Protection and Pollution Control of Yangtze River in Anhui of Anhui Provincial Education Department, School of Resource and Environment, Anqing Normal University, Anqing 246133, China
Wang C: Key Laboratory of Aqueous Environment Protection and Pollution Control of Yangtze River in Anhui of Anhui Provincial Education Department, School of Resource and Environment, Anqing Normal University, Anqing 246133, China
Xiao X: Key Laboratory of Aqueous Environment Protection and Pollution Control of Yangtze River in Anhui of Anhui Provincial Education Department, School of Resource and Environment, Anqing Normal University, Anqing 246133, China
Li M: Key Laboratory of Aqueous Environment Protection and Pollution Control of Yangtze River in Anhui of Anhui Provincial Education Department, School of Resource and Environment, Anqing Normal University, Anqing 246133, China
Zhao W: Key Laboratory of Aqueous Environment Protection and Pollution Control of Yangtze River in Anhui of Anhui Provincial Education Department, School of Resource and Environment, Anqing Normal University, Anqing 246133, China
Wang Y: Key Laboratory of Aqueous Environment Protection and Pollution Control of Yangtze River in Anhui of Anhui Provincial Education Department, School of Resource and Environment, Anqing Normal University, Anqing 246133, China
Yang Y: Key Laboratory of Aqueous Environment Protection and Pollution Control of Yangtze River in Anhui of Anhui Provincial Education Department, School of Resource and Environment, Anqing Normal University, Anqing 246133, China

Journal Name

Processes

Volume

Issue

First Page

216

Year

2023

Publication Date

2023-01-10

DOI:

https://doi.org/10.3390/pr11010216