The variation of phosphorus （P） bioavailability in terms of water soluble P （WSP ）, readily desorbable P （RDP）, algal available P （AAP）, and NaHCo3 extracting P （Olsen-P） in the re-suspended sediments was in...The variation of phosphorus （P） bioavailability in terms of water soluble P （WSP ）, readily desorbable P （RDP）, algal available P （AAP）, and NaHCo3 extracting P （Olsen-P） in the re-suspended sediments was investigated in laboratory experiments, in which the waters and sediments were taken from campus canal. The results indicate that sediment re-suspension can promote the migration, of soluble reactive P （SRP） from overlying water to sediments. The contents of AAP and Olsen-P in re-suspended sediments reduced obviously, whereas the values of the sediments in the control increased slightly, compared with the initial state, indicating that the P bioavailability in the sediments could be rcduced evidently due to sediment re-suspension. The content and characteristics of iron-bound P （BD-P） significantly affect the formation of AAP. The formation of OlservP has close relationship with the contents of BD-P, almninium-botmd P （AI-P）, and organic P （NaOH-nrP）.展开更多
基金National High Technology Research and Development Program(863) of China(No.2003AA601070)National Natural Science Foundation of China(No.50908154)
文摘The variation of phosphorus （P） bioavailability in terms of water soluble P （WSP ）, readily desorbable P （RDP）, algal available P （AAP）, and NaHCo3 extracting P （Olsen-P） in the re-suspended sediments was investigated in laboratory experiments, in which the waters and sediments were taken from campus canal. The results indicate that sediment re-suspension can promote the migration, of soluble reactive P （SRP） from overlying water to sediments. The contents of AAP and Olsen-P in re-suspended sediments reduced obviously, whereas the values of the sediments in the control increased slightly, compared with the initial state, indicating that the P bioavailability in the sediments could be rcduced evidently due to sediment re-suspension. The content and characteristics of iron-bound P （BD-P） significantly affect the formation of AAP. The formation of OlservP has close relationship with the contents of BD-P, almninium-botmd P （AI-P）, and organic P （NaOH-nrP）.
