(一)紫菜养殖的现状和主要问题日本在第二次世界大战以前,紫菜养殖已有了相当的规模,战后发展得更快。生产面积、生产数量都显著地增加了。在浅海养殖事业中占有极为重要的位置,主要是技术方面有了一些改革。其中最重要的有三项:(1)人工采苗和壳斑藻的人工培养管理。(2)浮绠张网养殖。(3)紫菜网的冷藏保存。 (A) the status quo and main problems of seaweed farming Japan before the Second World War, seaweed farming has been a considerable scale, the development of the post-war faster. Production area, the number of production have increased significantly. In shallow aquaculture occupies a very important position, mainly technical aspects of some reforms. One of the most important are three: (1) Artificial mining seedlings and shell cultured algae management. (2) floating 绠 Zhang net breeding. (3) seaweed net cold preservation.