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日本的紫菜养殖,主要依靠内湾沿岸的六万渔户进行。其产量提高较快,1952年以前不过10亿张左右,1960年以后增加到40亿张左右。第二次大战以后,生产者的实际收入在零售价格中所占的比例,从战前的30—40%到现在的60—70%。紫菜养殖利润的显著增加,刺激了生产积极性。并且,在山村、日本西部及旅馆中,以添加调味品的紫菜为主,需要量显著增大。由于这些原因,生产技术也迅速提高。到目前为止,紫菜养殖技术的研究,是从扩大养殖面积、增加单位
Seaweed farming in Japan relies mainly on the 60,000 fisheries along the Inner Gulf. Its output increased rapidly, but it was only 1 billion or so before 1952 and increased to 4 billion or so after 1960. After World War II, the share of producer’s real income in retail prices, from 30-40% before the war, to 60-70% now. Seaweed farming profits increased significantly, stimulating production enthusiasm. In addition, in the mountain villages, western Japan and hotels, the amount of seaweed added seasoning is the main factor. For these reasons, production technology has also rapidly increased. So far, seaweed farming technology research is to expand the area of breeding, increase the unit