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RESEARCH ARTICLE
Contents Vol 61(5)

Phosphorus sorption and desorption characteristics of wetland soils from a subtropical reservoir

Wenzhi Liu A , Guihua Liu A , Siyue Li A and Quanfa Zhang A B
+ Author Affiliations
- Author Affiliations

A Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China.

B Corresponding author. Email: qzhang@wbgcas.cn

Marine and Freshwater Research 61(5) 507-512 https://doi.org/10.1071/MF09013
Submitted: 22 January 2009  Accepted: 26 May 2009   Published: 28 May 2010

Abstract

Water-level regulation results in alternating exposure and inundation of soils in reservoir fluctuation zones, which may significantly influence the phosphorus sorption and desorption processes in the soil. The present study investigated the phosphorus sorption and desorption properties of wetland soils in China's Danjiangkou Reservoir using a batch equilibrium technique. Results showed that the maximum phosphorus sorption ranged from 435 to 1429 mg kg−1, with an average of 771 mg kg−1. The maximum phosphorus sorption was found to be significantly related to amorphous iron (r = 0.883, P < 0.01) and pH (r = −0.333, P < 0.05), and the binding constant k was strongly correlated with the amorphous iron (r = 0.475, P < 0.01) and organic matter (r = −0.455, P < 0.01). The phosphorus desorption percentage varied from 8 to 44%, with a mean value of 24%. The present study implies that short-term inundation in reservoir fluctuation zones would result in soil phosphorus desorption to some extent, in spite of the considerable absorption ability in the exposure period. These results are useful for assessing the phosphorus retention capacity of wetland soils and optimising management strategies for water conservation in reservoir regions.

Additional keywords: Danjiangkou Reservoir, inundation, non-point source pollution, release risk, river regulation.


Acknowledgements

Funding was provided by the National Key Technology R&D Program of China (2006BAC10B02) and the ‘Hundred-Talent Project’ of the Chinese Academy of Sciences (O629221C01). The authors thank Hongmei Bu and Youping Wang for their assistance with field sampling and water analysis. The authors are also grateful for the comments and suggestions from two anonymous reviewers.


References

Bao S. D. (2000). ‘Soil and Agricultural Chemistry Analysis.’ (China Agriculture Press: Beijing.)

Bennett, E. M. , Carpenter, S. R. , and Caraco, N. F. (2001). Human impact on erodable phosphorus and eutrophication: A global perspective. Bioscience 51, 227–234.
| Crossref | GoogleScholarGoogle Scholar | Chinese State Environment Protection Bureau (2002). ‘Water and wastewater Monitoring Analysis Methods.’ (Chinese Environment Science Press: Beijing.)

Daly, K. , Jeffrey, D. , and Tunney, H. (2001). The effect of soil type on phosphorus sorption capacity and desorption dynamics in Irish grassland soils. Soil Use and Management 17, 12–20.
Pang Y., Jin X. C., Wang S. R., Meng F. D., and Zhou X. N. (2004). Characters of phosphorus sorption in sediment of shallow lakes in the Middle and Lower Reaches of the Yangtze River: sorption isotherms and adsorption–desorption equilibrium mass concentration. Research of Environmental Sciences 17, 18–23. [In Chinese]

Pinay, G. , Gumiero, B. , Tabacchi, E. , Gimenez, O. , Tabacchi-Planty, A. M. , and Hefting, M. M. , et al. (2007). Patterns of denitrification rates in European alluvial soils under various hydrological regimes. Freshwater Biology 52, 252–266.
| Crossref | GoogleScholarGoogle Scholar | CAS | Wang G. H., Zhu Z. X., and Yuan K. N. (1989). Phosphorus sorption mechanism of red soil. Bulletin of Science and Technology 5, 31–35. [In Chinese]

Wang, S. R. , Jin, X. C. , Zhao, H. C. , and Wu, F. C. (2009a). Phosphorus release characteristics of different trophic lake sediments under simulative disturbing conditions. Journal of Hazardous Materials 161, 1551–1559.
| Crossref | GoogleScholarGoogle Scholar | CAS | PubMed | Yin K. H., Yuan H. R., Xu B. H., and Li Z. Y. (2001). Variation and correlation of environmental parameters in the water of Danjiangkou Reservoir. Resources and Environment in the Yangtze Basin 10, 75–81. [In Chinese]

Young, E. O. , and Ross, D. S. (2001). Phosphate release from seasonally flooded soils: a laboratory microcosm study. Journal of Environmental Quality 30, 91–101.
|  CAS | PubMed | Zhao W. Y., and Hu J. Q. (2007). Present status analysis to nonpoint source pollution in Danjiangkou Reservoir. South-to-North Water Transfers and Water Science & Technology 5, 50–52. [In Chinese]