论文部分内容阅读
根据南海区半封闭型海湾规模化养殖技术研究的需要，对红海湾底质硫化物进行了研究。用碘量法分析的结果表明：红海湾底质中硫化物含量的区域分布极不均匀，呈北部河口区＞虾池＞鱼湾＞中部＞南部自然水域＞礁滩区的特点。虾池、鱼的硫化物含量清淤前分别为清淤后的8.4、3．6倍；湾南部硫化物含量春季明显高于夏季，其余区域的两季差异不明显。46份样品中约13％、28％分别超过国内外评价标准，超标测站位于河口和清淤前的虾池、鱼。礁滩护养增殖区、南部自然水域、湾中部牡蛎养殖区和清淤后的虾池、鱼尚未见硫化物的污染。
According to the needs of the semi-enclosed bay scale farming in the South China Sea, sediment sulfides in the Red Bay were studied. The results of iodometric analysis show that the distribution of sulfide in the Red Bay sediments is very uneven, which is characterized by northern estuary> shrimp pond> Yuwan> middle> southern natural reef> reef beach. In the shrimp ponds and fish, the sulphide content in the fish was 8.4 and 3.6 times that before the desilication, respectively. The sulphide content in the south part of the bay was significantly higher in spring than in summer, while the difference in the other two seasons was not obvious. About 13% and 28% of the 46 samples respectively exceeded the evaluation criteria at home and abroad. The exceeding standard stations are located in estuaries and shrimp ponds and fish before dredging. Reef beach conservation and breeding area, the southern natural waters, oyster aquaculture area in the central bay and shrimp ponds after the dredging, fish have yet to see sulfide pollution.