近十年来,随着技术的飞快发展,在木材利用方面,出现了一种新的趋势。某些生产部门,如纤维板和刨花板生产、阔叶树木材纤维素,以及利用树冠的枝、叶制造维生素粉、叶绿素和胡萝卜素软膏等生产部门越来越显得重要。所有这些新的生产部门均具有一个特点,那就是对木材原料的要求不高。在这些部 In recent ten years, with the rapid development of technology, there has been a new trend in the utilization of wood. Production sectors such as the production of fiberboard and particle board, broad-leaved wood cellulose, and the use of branches and leaves of tree crowns to make vitamin powder, chlorophyll and carotene ointments, are becoming increasingly important. One of the characteristics of all these new manufacturing sectors is the low demand for wood raw materials. In these ministries