钦州湾秋季营养盐分布特征及营养状态分析研究  

Analysis on Distribution Characteristics and Nutritional Status of Nutrients of Qinzhou Bay in Autumn

作　　者：杨斌[1,2] 钟秋平[1] 鲁栋梁[1,2] 林美芳[1] 李尚平[1] 

机构地区：[1]钦州学院北部湾海洋保护与开发利用广西高校重点建设实验室,广西钦州535000 [2]中国海洋大学海洋化学理论与工程技术教育部重点实验室,山东青岛266100

出　　处：《环境科学与管理》2013年第12期40-44,共5页Environmental Science and Management

基　　金：广西自然科学基金项目(2010GXNSFA013063;2010GXNSFE 013006);广西教育厅科研项目(201106LX546)

摘　　要：根据2010年9月对钦州湾海域的现场调查资料，分析了钦州湾表层海水中营养盐的分布特征及其富营养化。结果表明：该湾亚硝酸盐（N02-N），硝酸盐（NO，-N），铵盐（NH4-N），磷酸盐（PO4-P）和活性硅（SiO3-Si）平均含量及范围分别为0．032（0．006-0．059）mg／L，0．262（0．018-0．663）mg／L，0．076（0．032-0．120）mg／L，0．009（0．001～0．02）mg／L和1．213（0．191-4．078）mg／L。在空间分布上，各营养盐含量均呈现出湾内高，湾外低的分布趋势，体现出秋季陆地径流的主导控制作用。相关性分析表明，秋季营养盐的补充均以陆源输入供应为主，对整个海湾的营养水平起到了主导控制作用。根据营养状态指数评价模式计算结果显示，秋季钦州湾调查海区总体表现为中度营养水平。Based on the data from the field survey in Qinzhou Bay, Guangxi and Southern China in September,2010, the con- centration distribution of nutrients and eutrophication were analyzed. The results showed that the average （range） levels of NO2 - N, NO3 -N, NH3 -N, PO4 -P and SiO3 -Si in the surface seawater were O. 032（0. 006- O. 059）mg/L, O. 262（0. 018 ～O. 663 ）mg/ L, 0. 076（0. 032 ～0. 120）mg/L, 0. 009（0. 001～0. 02）mg/L and 1. 213（0. 191 -4. 078） rag/L, respectively. The horizontal dis tributions of nutrients were in a decreasing trend from the upper bay to outside bay, suggesting that the land runoff was major control ling factor in autumn. The correlation analysis showed that the supplement of nutrients was mainly from land runoff, which played a dominant role in the nutritional level for the Qinzhou Bay. The seawater quality in the bay was analyzed by eutrophication index NQI. The result showed that the whole investigated area can be classified as moderate -level nutrient area in autumn.

关 键 词：营养盐 分布特征 相关性 营养状态 钦州湾 

分 类 号：X826[环境科学与工程—环境工程]