The ecological impact of eucalyptus－r51due

下面为大家整理一篇优秀的essay代写范文- The ecological impact of eucalyptus，供大家参考学习，这篇论文讨论了桉树对生态环境的影响。桉树是常见的一种树木种类，其原产地是澳大利亚，这种树种在南方地区十分常见。桉树在生长过程中能够减少地表水土流失，并且能够涵养水源，这一优势比较突出。另外，通过调查分析，桉树林水源也有一定的改善。

At present, China's ecological environment is becoming more and more serious, people pay more and more attention to the natural environment. In this environment, the number of human afforestation is increasing. In the southern region, eucalyptus is one of the more common wood species. Due to its strong adaptability, fast growth rate and good ecological effect, it has been promoted and planted in a large area. With the continuous expansion and development of eucalyptus planting area, some scholars have been thinking about the ecological environmental benefits of eucalyptus. Based on this, the influence of eucalyptus on ecological environment was analyzed and discussed.

In recent years, the southern region of eucalyptus planting area is more and more big, also emerge some ecological environment problems, then is this people of eucalyptus planting have doubt and don't understand, for this kind of phenomenon is worth thinking, what we do should not be said is the conformity of the one-sided, but should find the cause of the problem, to improve the current bad situation, comprehensive all aspects of standard, make scientific development strategy, build a suitable eucalyptus growth environment. From the use, eucalyptus not only beautify the environment, clean the air, windbreak forest role, but also can be used for paper, furniture and other purposes, with strong economic benefits.

Eucalyptus is a common tree species in China, its country of origin is Australia, this species is very common in southern China region, such as: in the middle of the 19th century, eucalyptus was introduced to our country in guangxi, with its variety, strong ability to adapt, fast growth aspects of advantages, loved by the people, people in China have a wide range of applications in the growing of afforestation. So far, our country of eucalyptus plantation wood production occupy 26.9% of timber production in our country, planting area has already received 4 million hm2, with the expanding of eucalyptus planting area, also gradually derived a series of ecological problems, people call eucalyptus trees industry pump, the suction fat machine, this is mainly due to the growth of eucalyptus is strong force, guangxi region, for example, the current in order to further improve the rural water resources has developed a series of related rules, ban on water source protection zones for planting eucalypt in short cut trees.

The above people will be called eucalyptus fertilizer machine is not accurate, from a certain extent, eucalyptus in order to meet their growth needs from the soil to obtain nutrients, nutrients is inevitable, eucalyptus plantation due to the growth rate, density, absorption, soil fertility decline is a normal phenomenon. However, from another point of view, eucalyptus trees can reduce soil erosion during the growth process, and can conserve water, this advantage is more prominent. Therefore, the demand of eucalyptus afforestation for soil nutrient fertility is higher than that of irrigated slope plants, but the gap between them is limited. In addition to requiring more nutrients at the initial stage of growth, the demand for subsequent growth is similar to that of other vegetation. In order to alleviate this phenomenon and reduce the influence of eucalyptus trees on soil fertility, organic fertilizers should be used reasonably in the process of afforestation, and nutrients in soil can be protected through a series of methods to meet various needs, so as to achieve the purpose of soil fertility.

Through investigation and analysis of eucalyptus forest and other afforestation vegetation, soil, water, eucalyptus forest can be divided into two categories, one is afforestation, mainly according to the actual situation of the region in the planning for eucalyptus tree planting; The other is the natural growth of the natural forest, its internal miscellaneous wood variety. Through the comparative analysis of the two, eucalyptus trees have a relatively high utilization rate of water and nutrients, and the total amount of water and nutrients consumed per unit area is very large. Due to high output value, fast growth rate and short cycle, eucalyptus trees take away a large amount of water in the soil. In spite of this, there is no water pollution caused by eucalyptus planting, and the drinking water conservation forests in the surrounding cities are basically eucalyptus forests, and no adverse reactions have been found.

In the process of eucalyptus planting, many people believe that eucalyptus large-scale planting has an inhibitory effect on the growth of other species, and it is difficult for grass, shrubs, trees and other species to grow together with eucalyptus, resulting in the bald surface of eucalyptus woodland and the single biological species. In reality, there are many such phenomena. This problem is caused by a number of reasons, such as: eucalyptus planting density, forest vegetation is scarce; There was no other vegetation on the land before planting; Economic benefits attract people to highly concentrated planting, artificial weeding and other work, resulting in difficult growth of vegetation under eucalyptus. The existence of this phenomenon, resulting in the fragile eucalyptus forest ecosystem, due to human deforestation, vegetation does not have enough time to recover the health of growth.

Because of the influence of eucalyptus planting is unreasonable, the biodiversity of eucalyptus plantation, and did not take the prevention and treatment of science, plant diseases and insect pests of eucalyptus plantation after planting the problem is more serious, the existence of the pest problems not only affects the quality of the eucalyptus plantations, on surrounding the damage crops, plants is extremely serious. Aiming at this phenomenon, relevant personnel in the late of early prevention and control must be done well, combining with the characteristics of plantation, from many respects, ecology, economics will pest management throughout the whole process of eucalyptus planting and growth, the reasonable arrangement of eucalyptus forest planting structure, improve the ability of plantation overall prevention and control of plant diseases and insect pests, for there are some problems of plant diseases and insect pests, according to different diseases and insect pests prevention and control of different measures, guarantee the healthy development of the ecological environment.

Rational division of eucalyptus planting areas, choose a reasonable place to plant, to a large extent to avoid the adverse effects of the ecological environment. In eucalyptus planting concrete, should strictly carry out the planning content, and the reasonable division of eucalyptus planting area and the eucalyptus planting area, banned in drought, water conservation, steep slope soil vulnerable area of eucalyptus planting, in combination with the practical situation of region and ecological environment, change the current situation of the higher percentage of eucalyptus pure forest, optimize the internal structure of eucalyptus forest, eucalyptus of ecological protection and improve the ability.

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