苏联山地森林约有26300万公顷,占森林总面积的28%。每年在山地森林采伐的木材约为5000万立方米。为了保护山区的环境,近年来在坡度超过20—25度的伐区只进行渐伐和择伐。坡度超过30度的地方,禁止任何形式的采伐(喀尔巴阡的个别地区除外)。这就改变了山区森林的开发方法。从皆伐变为非皆伐,使单位面积的出材量减少到三分之一,需要把林 There are about 263 million hectares of mountain forests in the Soviet Union, accounting for 28% of the total forest area. The annual harvest of wood in mountain forests is about 50 million cubic meters. In order to protect the environment in mountainous areas, only tapping and selective cutting have been carried out in cutting areas of more than 20-25 degrees in recent years. Where the slope is more than 30 degrees, any type of logging is prohibited (except in individual areas of the Carpathians). This has changed the way mountain forests are developed. From clear cut into non-clear cut, so that the amount of wood per unit area reduced to one-third, you need to Lin