The nutrimental level in the Niyu Island and the Sanpan Island are the highest,because the inorganic nitrogen in the waters is too high.

• 结果表明,丰水期水体中营养盐含量明显高于平水期,霓屿海域和三盘港海域富营养化最为严重,无机氮是水质富营养化的主要因素。