Abstract:

For N and P are the one of the most important factors in near-coast cage culturing system, the research on Kjeldhal nitrogen (TKN) and total phosphorus (TP) has been conducted once a month at Shen’ao Bay in 2007 and 2008 to reveal its distributions and patterns in superficial deposits. It was showed that the fluctuation of TKN was 0.533-2.038 mg/g. The temporal fluctuation of TKN was weak and no seasonal patterns were found, but there was a significant spatial variation; It was also showed that the fluctuation of TP was 0.042-2.085 mg/g with no seasonal patterns. And a significant spatial patterns was showed. Meanwhile, a similar research was conducted at Dahao culturing area. The comparison of TKN and TP in superficial deposits of Shen’ao Bay, Dahao culturing area and Zhelin Bay (data was quoted from another paper) was conducted. It was showed that the contents of N and P in Shen’ao bay were lower than in the two areas, meanwhile its contents were correlated with human activities in Shen’ao bay.