论文部分内容阅读
一、前言在日本,紫菜养殖的年产量約为40亿张(干品),价值300亿日元。紫菜的养殖海区逐年远离海岸,向外海方面扩展。另一方面,由于排水填平工程和城市工厂排放污水的关系,有的养殖海区已不能再用,今后还会更多地出現这类情况。二、欧美培养藻类的情况在海藻养殖方面,除日本外,只有中国大規模养殖海带。欧美各国的海藻培养,只是从生物学的角度出发,进展不大。对硅藻等微小单細胞藻类的培养,則由于海洋生产力研究及动物餌料方面的需要,早在积极进行。1930年以前,仅在天然海水中加入N、P,
I. Preface In Japan, the annual production of seaweed farming is about 4 billion pieces (dry goods), worth 30 billion yen. Seaweed farming sea area away from the coast year after year, to expand the sea. On the other hand, some aquaculture areas can not be reused due to the relationship between the drainage project and the sewage discharged from urban factories. Such situations will occur more in the future. Second, the cultivation of algae in Europe and the United States In the cultivation of seaweed, in addition to Japan, only China’s large-scale breeding kelp. Seaweed cultivation in Europe and the United States, only from a biological point of view, little progress. Cultivation of tiny unicellular algae, such as diatoms, is actively pursued due to the need for marine productivity studies and animal feed. Before 1930, only natural seawater added N, P,