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池塘养殖在我国淡水养殖中占有重要地位，直接影响池塘养殖水平的有两大因素：一是养殖技术，二是养殖品种。这里的品种有养殖种类与种质双层含义。在养殖技术大大改进并日臻完善的今天，“种”的问题成了人们十分关注的焦点。我国幅员辽阔，各地养殖的种类有各自的特点，根据
Pond culture plays an important role in the freshwater aquaculture in our country. There are two main factors that directly affect the level of pond aquaculture: aquaculture technology and aquaculture species. Breeds here have breeds and germplasm double meaning. At a time when aquaculture technology has been greatly improved and improved, the issue of “species” has become the focus of great concern. Our country has a vast territory, and the types of farms have their own characteristics and bases