根据国际原镁协会发表的数字,1981年度的镁产量下降到1977年以来的最低水平,那是因为几家大镁厂为适应库存增高的情况大幅度削减了产量。年度产量为208500吨,而创记录的1980年则达236600吨。美国的镁业公司普遍都把镁工业的减产归因于对铝镁合金需求的减少(这通常占市场总额的50％)和对镁压铸件需求的急剧下降。 According to figures released by the International Association of Magnesia, magnesium production in 1981 dropped to its lowest level since 1977, as several large magnesium plants cut output substantially to accommodate increased inventories. The annual output is 204,500 tons, compared with a record high of 226,600 tons in 1980. Magnesium companies in the United States generally attribute the reduced magnesium industry to a decrease in demand for aluminum-magnesium alloys (which typically accounts for 50% of the market) and a drastic drop in the demand for magnesium die-castings.