我省位于祖国西北高原,是由东南走向西北的一条狭长地带,总面积五十多万平方公里。境内地势高而复杂,海拔一般在一千二百至二千米之间,最低为六百多米,最高达五千米以上,气候干旱少雨。天然森林类型繁多,林业生产建设和植树造林均有显著的地区差异。 解放以来,在毛主席革命路线指引下,我省群众性的植树造林有了很大发展,天然 Located in the northwestern plateau of our motherland, our province is a narrow strip from southeast to northwest with a total area of ​​more than 500,000 square kilometers. The terrain is high and complex. Its elevation is generally between 1,200 and 2,000 meters, with a minimum of more than 600 meters and a maximum of 5 kilometers or more. The weather is arid and dry. There are many types of natural forests, and there are significant regional differences in forestry production and afforestation. Since the liberation, under the guidance of Chairman Mao’s revolutionary line, there has been a great development in mass afforestation in our province. Natural