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在我国960万平方公里的国土上,分布着大小山脉217条,山地面积6.49亿ha,占国土面积的67.6%,而耕地只有4351.43万ha,不到十分之一。山区人口4.3953亿人,其中农业人口为3.9525亿人,占总人口的36%,山区生产粮食1430亿kg,占44.6%,森林面积1.1亿ha,占森林总面积90%,蓄积80多亿m~3,占总蓄积量的84%。因此,治理山区、开发山区,对于我国国民经济发展有举足轻重的意义。
There are 217 large and small mountains distributed in 9.6 million square kilometers of land in China. The mountainous area is 669 million ha, accounting for 67.6% of the total land area, while the cultivated land is only 43,514,300 ha, less than one tenth of the total. Mountain population of 399.53 million, of which agricultural population of 395.5 million, accounting for 36% of the total population, mountain production of 143 billion kg of grain, accounting for 44.6%, forest area 110 million ha, accounting for 90% of the total forest area, the accumulation of more than 8 billion m ~ 3, accounting for 84% of the total volume. Therefore, the management of mountainous areas and the development of mountainous areas are of great significance to the development of our national economy.