近年来,大面积的速生树种人工林,已经在一些国家解决用材需要方面起显著作用。如新西兰截止1969年已有52万公顷引进树种的人工林,平均每人约0.2公顷,年生长量达700万立方米,每年的木材生产量不仅能满足国内需要,而且还能大量出口。缺林国家,都把营造大面积速生用材林做为提高木材产量和解决本国木材资源不足的重要措施之一。 In recent years, a large area of ​​fast-growing species of plantations has played a significant role in addressing the need for timber in some countries. For example, New Zealand had 520,000 hectares of tree plantations introduced by 1969, with an average of about 0.2 hectares per person and annual growth of 7 million cubic meters. Annual timber production can not only meet domestic needs but also be exported in large quantities. In the absence of forests, all these have made it one of the important measures to create large areas of fast-growing timber forests as a means of raising timber output and solving the problems of insufficient domestic timber resources.