Abstract:Diffusive gradients in thin-films (DGT) technique, four traditional extraction methods for bioavailable phosphorus (water soluble P, readily desorbable P, algal-available P and NaHCO3extractable P) and algal assay were compared to investigate availability of phosphorus (P) in sediments from 9 sampling sites in Lake Taihu to Microcystis aeruginosa. DGT-measured P (DGT-P) showed higher correlation (R2 =0.941, P<0.01) with algal growth than other traditional extraction methods for bioavailable phosphorus (R2 =0.780, 0.806, 0.849 and 0.910 for WSP, RDP, AAP and Olsen-P, respectively, P<0.01). Therefore, DGT technology could be considered as a good tool to assess bioavailability of phosphorus in sediments to algae.
徐望龙, 王晓蓉, 鲜啟鸣, 罗军, 刘智敏, 耿金菊. 不同方法测定沉积物中生物可利用性磷对铜绿微囊藻生长量的影响[J]. 中国环境科学, 2011, 31(9): 1486-1491.
XU Wang-Long, WANG Xiao-Rong, XIAN Qi-Ming, LUO Jun, LIU Zhi-Min, GENG Jin-Ju. Assessment the influence of P availability of sediments in Lake Taihu to Microcystis aeruginosa using different methods. CHINA ENVIRONMENTAL SCIENCECE, 2011, 31(9): 1486-1491.