关键词: 南日岛, 水质, 营养状况, 评价, Nan Ri island, water quality, nutritional state, assessment

Abstract: Abstract According to the survey of seawater quality and nutritional status at sea area around Dongdai village in Nan Ri island in June, October in 2012 and March in 2013, the result suggested that the quality of seawater in this area is good, inorganic nitrogen, chemical oxygen demand and oil are in accordance with Chinese national 1st class water quality standards. On the contrary, the inorganic phosphorus reached the 3rd class of Chinase national water quality standards in February voyage in 2013. The phosphorus-rich phenomenon is obvious. By the value of E, TSIm and WQI, the seawater in February voyage in 2013 come out to be light pollution, and the key factor leading to it is inorganic phosphorus. It could be ascribe to the abalone nursery industry. Overall, seawater in this area is in a healthy state, and can meet the natural P. haitanensis growth requirements, but the phosphorus-rich phenomenon should be attention to, without which could lead to environmental degradation.