一、利用树叶的重要性树木全身都是宝,从树干、树根、枝桠到树叶皆可利用。国外对树叶资源的开发利用十分重视。用树叶作畜禽饲料已有三十余年的历史。目前已进行工业化加工松针粉、松针膏的有罗马尼亚、加拿大和苏联等国。罗马尼亚仅利用加工的产品,一年所获得的经济收入就相当于十余万立方米木材的价值。 First, the importance of the use of leaves Trees are all treasure, from the trunk, roots, branches and leaves are available. Foreign countries attach great importance to the development and utilization of the leaves resources. With leaves for animal feed has been more than thirty years of history. At present, there are industrialized processing of pine needle powder, pine needle cream in Romania, Canada and the Soviet Union and other countries. Romania uses only processed products and receives about one million cubic meters of lumber per year in economic terms.