Journal
COMMUNICATIONS IN SOIL SCIENCE AND PLANT ANALYSIS
Volume 42, Issue 14, Pages 1752-1764Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/00103624.2011.584599
Keywords
Aerobic and flooded conditions; phosphorus transformation; rice paddies; soil properties
Categories
Funding
- Natural Science Foundation of China [41071299, 40773075]
- Special Research Foundation of the Public Natural Resource Management Department from Ministry of Environmental Protection of China [201109018]
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Moisture conditions in rice paddies play an important role in phosphorus (P) cycling and may affect P loss to nearby water bodies. This study seeks to identify factors that contribute to P-fraction transformations in flooded rice paddies on Cambosols and Anthrosols using Zhangjiagang County of the Yangtze River delta region, China, as a study area. Soil samples preserved under flooded and aerobic conditions (n = 60) were collected, and P fractions and soil properties were measured. Under flooded conditions, soluble and loosely bound P significantly decreased to half of aerobic levels, aluminum/iron-bound P increased by 66%, and organic-bound P decreased by 64%. Soil organic matter, cation exchange capacity, pH, and active iron were well correlated with soil P fractions under both moisture conditions across two soil orders despite a disparity in soil properties. Further research goals that would aid in specific fertilizer recommendations and management strategies are identified.
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