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Measuring Phosphorus Release in Laboratory Microcosms for Water Quality Assessment
Published on: July 22, 2019
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Periphyton: an important regulator in optimizing soil phosphorus bioavailability in paddy fields.
Yonghong Wu1, Junzhuo Liu2, Haiying Lu2
1State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, 71 East Beijing Road, Nanjing, 210008, China. yhwu@issas.ac.cn.
Environmental Science and Pollution Research International
|August 10, 2016
Summary
Periphyton in paddy fields enhances soil phosphorus bioavailability for crops by increasing various phosphorus fractions. This algae can also be a potential fertilizer, aiding phosphorus regulation in paddy ecosystems.
Area of Science:
- Agricultural Science
- Ecology
- Soil Science
Background:
- Periphyton is common in paddy fields but its role in phosphorus (P) bioavailability is understudied.
- Understanding periphyton's impact is crucial for paddy soil fertility and P management.
Purpose of the Study:
- To investigate how periphyton influences phosphorus bioavailability in simulated paddy soil.
- To quantify changes in different phosphorus fractions due to periphyton presence.
Main Methods:
- A greenhouse experiment simulating a paddy field environment.
- Analysis of various phosphorus fractions (WSP, RDP, AAP, Olsen-P) in soil and floodwater.
- Quantification of phosphorus captured by periphyton.
Main Results:
- Periphyton reduced floodwater P but significantly increased soil P bioavailability.
- All measured soil P fractions, especially Olsen-P, increased with periphyton presence.
- Periphyton captured substantial P, with calcium phosphate (Ca-P) being dominant, indicating fertilizer potential.
Conclusions:
- Periphyton presence in paddy fields improves phosphorus bioavailability for crops.
- Periphyton plays a key role in phosphorus cycling and migration within paddy ecosystems.
- Findings support periphyton as a tool for managing phosphorus in agricultural systems.
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