摘要
Abstract
In the later 50 years of 20 th century, the production of thepaper and board from 43 million tonsin 1950 raised to 315 million tons in 1999. The average increasing rate was 4.24% per year in 49 years. The production in one year was average increased 3.14 million tons in first 10 years but 8.5 million tons in last 10 years. However, the increasing rate of one year in first 10 years was 6.27% and in last 10 years was reduced to 3.55%. The ratio of the pulp versus paper and board from 80. 74% reduced to 56.73%. This trend will be continued in the 21st century if no unusual change. In last 10 years of 21st century, the average production per one year will be increased 19 million tons but the increasing rate of one year will be reduced to 1.33%. The virginal pulp would be produced 490 million tons in 2100. In last 10 years of 21st century, the average production per one year will be increased 4 million tons and the increasing rate of one year will be reduced to 0. 95%. The production ratio of the virginal pulp versus paper and board will be reduced to 29. 17%. The balance of the production in virginal pulp for paper and board will be mainly supplied by secondary fiber. The 90% of virginal pulp produced from wood will be still not changed considerably, but the wood species and their location would be obviously changed. However, the non - wood plant will be taken more attentions.关键词
21世纪/造纸纤维原料/二次纤维/木材/非木材Key words
21 st century, fiber resources, secondary fiber, wood, non - wood分类
轻工纺织
