Effect of low-molecular-weight organic acids on phosphorus soil activation: A laboratory study of the soils from Wangbeng section of the Huaihe River Basin, China

Jinxin Zhang, Liangmin Gao, Zhendong Pang, Linghan Liu, Xiaoqing Chen, Shuo Wang, Hui Wang, Rongrong Tong, Chuang Shi and Xudong Chen
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Jinxin Zhang: School of Earth and Environment, Anhui University of Science and Technology, Huainan, Anhui, P.R. China
Liangmin Gao: School of Earth and Environment, Anhui University of Science and Technology, Huainan, Anhui, P.R. China
Zhendong Pang: Environmental Protection Monitoring Station of Huainan city, Huainan, Anhui, P.R. China
Linghan Liu: Zhejiang Wangneng Ecological Technology Co., Ltd., Huzhou, Zhejiang, P.R. China
Xiaoqing Chen: School of Earth and Environment, Anhui University of Science and Technology, Huainan, Anhui, P.R. China
Shuo Wang: School of Earth and Environment, Anhui University of Science and Technology, Huainan, Anhui, P.R. China
Hui Wang: School of Earth and Environment, Anhui University of Science and Technology, Huainan, Anhui, P.R. China
Rongrong Tong: School of Earth and Environment, Anhui University of Science and Technology, Huainan, Anhui, P.R. China
Chuang Shi: School of Earth and Environment, Anhui University of Science and Technology, Huainan, Anhui, P.R. China
Xudong Chen: School of Earth and Environment, Anhui University of Science and Technology, Huainan, Anhui, P.R. China

Plant, Soil and Environment, 2021, vol. 67, issue 11, 660-667

Abstract: Farmland soil samples from the northern and southern banks of the Wangbeng section of the Huaihe River Basin, China, were collected and treated with three different low-molecular-weight organic acids (LMWOAs) (malic acid, citric acid, oxalic acid). This study aimed to determine how these acids affect soil phosphorus activation. The results showed that the average activation rate of total phosphorus, inorganic phosphorus, Fe/Al-P and Ca-P in soil samples from the southern bank treated with malic and citric acid was above 162%, except for organic phosphorus, with the highest at 192.04%. The three organic acids displayed significantly greater phosphorus activation in the northern bank soil samples than those of the southern bank. However, the overall average activation rate in the northern bank soils was lower than that of the southern bank. The four factors of phosphorus species, acid species, acid concentration, and treatment time had significant effects on phosphorus activation in the soils from both banks. This study showed that the three organic acids significantly activated inert phosphorus in the soil. Among them, malic acid and citric acid had a stronger effect on activating soil phosphorus and increased the available soil phosphorus utilisation rate.

Keywords: soil property; soil phosphorus mobility; available phosphorus; phosphorus correlation (search for similar items in EconPapers)
Date: 2021
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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlpse:v:67:y:2021:i:11:id:379-2021-pse

DOI: 10.17221/379/2021-PSE

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