文档介绍：Study on the Biotic Influence on Internal Phosphorus Release
in the Sediment of Lake Xuanwu
Shiwei Cao Zhaoqian Jing Zheng Wang
College of Civil Engineering
Nanjing Forest University
Nanjing, China
cswxyd@
Abstract— To uncover the biotic influence of the internal
phosphorus release in the sediment of Lake Xuanwu, colony- I. MATERIALS AND METHOD
counting method of flat-panel culture was used to analysis the
amount and categories of phosphorus-degrading A. Sampling and Analyses
anism. The result showed that there were Lake Xuanwu located the east-north of Nanjing city. It
phosphorus-degrading anisms in the sediments of the was a small and shallow lake. The shoreline of the lake was
Lake Xuanwu and most them were anic phosphorus- Diamond-shaped and the girth was 10 km, the average water
degrading anisms, the number was × 104 cfu depth was m, the largest depth was m and the
each gram sediment, while anic phosphorus-degrading average level was between - m. The lake includes
anism was few. The internal phosphorus release four parts: the south east Lake, northeast Lake, northwest
contrast experiments were done with the sediment with Lake and southwest Lake. Because of being polluted by the
anism and without anism. The result showed sewage and industrial effluent, there was much
that the anism absorbed more phosp