How many times is the protection range of general shelterbelts higher than that of trees?

The protection range of general shelterbelts is 15- 17 times of the height of trees.

Shelterbelt refers to natural forests and artificial forests that are operated for water and soil conservation, wind and sand fixation, water conservation, climate regulation and pollution reduction. It is a forest community, whose main purpose is to defend against natural disasters, maintain infrastructure, protect production, improve the environment and maintain ecological balance.

It is one of the main tree species in China. Protection forest types of soil and water conservation protection net in Ningxia generally include artificial forest (including contiguous forest land, forest belt and forest net) and natural forest (such as water conservation forest and soil and water conservation forest), and cutting and destruction are strictly prohibited. To build a shelter forest, we must follow the principle of adapting measures to local conditions and building a strong defense.

In China, according to the purpose and efficiency of protection, protection forests are divided into water conservation forests, soil and water conservation forests, windbreak and sand fixation forests, farmland and pasture protection forests, road protection forests and bank protection forests.

In Japan, shelter forests include: water conservation forest, soil and water conservation forest, waterproof landslide forest, sand fly prevention forest, windbreak forest, waterproof forest, moisture prevention forest, drought prevention forest, fog prevention forest, avalanche prevention forest, stone forest, fire prevention forest, fishing protection forest, navigation mark protection forest, health protection forest and scenic protection forest.

Specific technical requirements for building shelter forests:

1, tree species selection and mixed types, it is advisable to choose trees with stable growth, long life and strong resistance, especially excellent native trees. According to local conditions, create mixed forests of trees, shrubs, yin and yang trees and other types.

2, shelter forest configuration, according to the protection purpose and landform type, configuration shelter forest belt. Water source forest and soil and water conservation forest are arranged in sheets, strips or blocks to form a complete soil and water conservation forest system.

3, tending management, in the shelter forest area can only be selective cutting, removal of rotten wood, and must be updated in time.