[Influence of cage culture in Yaling Bay on water environment]

On the basis of on-the-spot survey and analysis of water quality and bed mud in different cage culture section from April of 2002 to January of 2003, the analysis result indicate that the main influence of cage culture on environment are that: (1) It increase the content of nutrition salt, BOD, COD, organic matter and TSS, especially inorganic-nitrogen, inorganic-phosphor and ammonia nitrogen; (2) It enrich N, P, sulphide and organic matter in sediment. The most obvious is nitrogen, sulphide and ammonia nitrogen, next is total nitrogen and organic matter.