森林,不但能给我们提供社会主义建设用材,而且在保护人类生产和生活环境等多种综合效益方面都有极其重要的作用。我国是个森林资源比较贫乏的国家。全国森林复盖率仅有12.7%,而且分布又极不均匀。为了在本世纪末在我国实现四个现代化,大力培育森林及合理利用森林资源是摆在我们面前刻不容缓的任务。建国以来全国植树造林累计保存面积达四亿二千万亩,取得了一定成绩。但这还远远满足不了林业发展的要求。而且在林业生产中存在着采育比例失调,森林大 Forests not only provide us with materials for socialist construction, but also play an extremely important role in various comprehensive benefits such as protection of human production and living environment. Our country is a country with relatively poor forest resources. The national forest coverage rate is only 12.7%, and the distribution is extremely uneven. In order to realize the four modernizations in our country by the end of this century, it is an urgent task for us to cultivate forests and make rational use of forest resources. Since the founding of the People’s Republic of China, the total area preserved by afforestation has reached 420 million mu and some achievements have been made. But it still can not meet the requirements of forestry development. And in forestry production, there is a mismatch of procreation and forestry