Study of chemical forms of phosphorus and their bioavailability in the sediments

ZHENG Ai-rong; SHEN Hai-wei; LI Wen-quan

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ZHENG Ai-rong, SHEN Hai-wei, LI Wen-quan. Study of chemical forms of phosphorus and their bioavailability in the sediments[J]. Haiyang Xuebao, 2004, 26(4): 49-57.

Citation:

ZHENG Ai-rong, SHEN Hai-wei, LI Wen-quan. Study of chemical forms of phosphorus and their bioavailability in the sediments[J]. Haiyang Xuebao, 2004, 26(4): 49-57.

ZHENG Ai-rong, SHEN Hai-wei, LI Wen-quan. Study of chemical forms of phosphorus and their bioavailability in the sediments[J]. Haiyang Xuebao, 2004, 26(4): 49-57.

Citation:

ZHENG Ai-rong, SHEN Hai-wei, LI Wen-quan. Study of chemical forms of phosphorus and their bioavailability in the sediments[J]. Haiyang Xuebao, 2004, 26(4): 49-57.

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Study of chemical forms of phosphorus and their bioavailability in the sediments

1.
Department of Oceanography Xiamen Unirersit, Xiamen 361005, China;Institute Subtropical of Oceanography Xiamen University, Xiamen 361005, China
2.
Graduate School of Oceanography, University of Rhode Island, Narragansett 02882, USA

Received Date: 2003-02-18
Rev Recd Date: 2003-07-15

Abstract

Abstract

Chemical forms of phosphorus in the sediments at the Daya Bay,the Zhujiang River Estuary,and the Xiamen Bay were measured with extraction solutions of MgCl₂,NaOH,and HCl.Their availabilities to Chlorella sp.and Isochrysis galbana were estimated by using sediments as the sole source of P in the bioassays.The results show that the contents of total phosphorus(T P) in these sediments are 449.3,650.1 and 643.9 mg/kg,respectively.The contents of non-apatite inorganic P(NAIP) extracted with MgCl₂ and NaOH in three sediments are 168.8,146.6 and 118.1 mg/kg,respectively,and account for 18.3%~32.6% of TP.The phosphorus extracted with HCl solution is greater than that extracted with NaOH solution,whereas the lowest extracted P is MgCl₂-extractable P.The greatest relative growth rates of Chlorella sp.and Isochrysis galbana cultured with sediments are in the range of 4.3%~26.9%.The increasing biomasses of these algae are corresponding to NAIP and AA PP(the estimated alg al-available particulate P).AAPP accounts for 42.4%~78.2% of NA IP,21.1%~27.1% of total inorganic P,and 11.8%~20.3% of T P,respectively.
- chemical forms,
- phosphorus,
- bioav ailability,
- sediment

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