Briefly describe the differences between planted forests and natural forest ecosystems in terms of s

For a long time, in order to change the drastic decline of natural forests and improve the environment, we have carried out a variety of afforestation campaigns nationwide, such as returning farmland to forests, protecting natural forests, and preventing desertification. I believe that most people have such a beautiful and pious wish and idea: afforestation is to protect the ecological environment, and it is a matter of immeasurable merit for the present and future generations, so the more trees, the better, and the larger the green area, the better.

However, we may not have imagined that we are preventing one ecological catastrophe and creating another at the same time.

In our understanding, the desert is generally associated with tearing, scorching, and desolation, but green represents life and vitality, so why is the green wave of the plantation now associated with the desert?

The reason why planted forests are called "green deserts" is mainly because they have a single tree species, close in age and height, are very dense, lack of intermediate shrubs and surface vegetation under the forest, and lack biodiversity and water and soil conservation functions.

More specifically, compared with natural forests, plantations have the following major disadvantages: first, the surface vegetation of plantations is very poor, so the ability to maintain water and soil is also relatively weak; Second, the nutrient cycle process in the plantation is blocked, and the soil nutrient is increasingly scarce; 3. The ecological status of plantations is very weak; Fourth, plantations are prone to toxins.

We must not only be vigilant against the destruction of the forest, but also against the communization of the forest. We shouldn't create one "green desert" after another while creating one yellow desert after another!

The stability and self-resilience of natural forest ecosystems are higher than those of planted forests.

Plantations have a smaller impact on natural conditions than natural forests.

In the protection and restoration of ecosystems, the use of natural forces to restore ecosystems should be given top priority. The sum of ecological processes in different habitats, biological groups and biospheres is manifested in the diversity of ecosystem structure and the complexity and variability of ecological processes.

The conservation of ecosystem diversity is particularly important, because both species diversity and genetic diversity reside in ecosystem diversity, and the conservation of ecosystem diversity directly affects species diversity and their genetic diversity.

To diagnose and evaluate the health of the existing forest ecosystem, we should consider the productivity level, structural status, anti-external disturbance ability and ecological service function of forest land.

Compared with the planted economic forest, the habitat of natural forest is more harsh, and the ratio between mature and sub-mature timber forest should be considered more for the health of the system. Economic forests are artificial habitats, and their health level is expressed as the level of productivity.

From the perspective of ecosystem stability, the reason why the same tree species is often not selected when establishing plantations.

Hello dear. The same tree species is usually not selected when establishing plantations because the population of the same tree species has similar genetic characteristics and adaptability to the growth environment, which can easily lead to the reduction of biodiversity in the plantation, the premature occurrence of diseases and pests, and the threat of the same disease to the whole plantation, which has a negative impact on the stability of the ecosystem. Therefore, it is necessary to establish plantations in rotation, that is, different tree species are planted alternately, so as to increase the species diversity in the plantation and improve the stability of the ecosystem.

Seed rotation can also take advantage of the interaction between different tree species to promote the synergistic growth of tree species, and improve the productivity and economic benefits of silver transportation in plantations. At the same time, crop rotation can also reduce the occurrence and spread of pests and diseases, and reduce the management risk of plantations. Therefore, when establishing plantations, it is necessary to select appropriate tree species for rotation according to different environmental conditions and economic needs, so as to achieve the best ecological and economic benefits.

1. The forestry ecological engineering system is a complex system, which is composed of forestry ecological engineering technology, forestry ecological engineering facilities, forestry ecological engineering management and forestry ecological engineering economy.

2. The technology of forestry ecological engineering system involves forestry ecology, forestry technology, forestry economics, forestry management, forestry resource management, forestry environmental protection and other multidisciplinary fields.

3. The facilities of the forestry ecological engineering system include forestry ecological engineering facilities, forestry ecological engineering equipment, and forest and Shenye ecological engineering buildings.

4. The management of the limb type system of the ecological engineering of the Forestry Department includes forestry.

Answer] :(1) Conserve the water source of the slippery envy, and keep the water and soil in the section;

2) regulate the climate and increase rainfall;

3) Wind prevention and sand fixation, protection of farmland;

4) Purify the air and prevent pollution;

5) Reduce noise and beautify the environment;

6) Provide fuel and increase fertilizer sources.