[Phosphorus sorption and desorption of agricultural soils under different land uses].
The potential of P loss from soils under different land uses in Taihu Lake watershed was evaluated by laboratory experiment. It was shown that although the P sorption capacity of paddy soils under oxidized conditions were little lower than that of dryland soils the risks of P loss from the former via runoff and leaching were lower than that from the latter, because the soil P levels of the former were much lower than that of the latter. For most paddy soils the P sorption capacity increased and the P release decreased under reduced conditions than that under oxidized conditions and this was attributed to the formation of amorphous Fe2+ hydroxides which have a greater surface area and more P sorption sites than well-crystallized Fe3+ oxides.
Gao
C
C
Nanjing University, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, China.
Zhang
T
T
Wu
W
W
D000327:Adsorption; D000383:Agriculture; D010084:Oxidation-Reduction; D010758:Phosphorus / Q000737:chemistry*; D012987:Soil / Q000032:analysis*
D012987:Soil; D010758:Phosphorus