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莱芜翻译公司关键字：construction; followed the process of planting trees and grass from the point of view, too simplistic, mostly one-step selection, planting trees to be planted directly to sow grass harvested directly The seeds, regardless of the initial natural conditions. Some sections can be planted in theory, does not mean that one kind of live, and can forest.Second, diversity lead to the stability of law. Based on animal and plant symbiosis, epiphytes, parasites, competition and other relationships within the plant communities on the basis of more complex species or a particular region more stable plant community types, the formation of more stable eco-system, subjected to environmental change and the kinds of disasters are also stronger, which is often called the law of diversity, leading to stability. Lack of diversity on ecological construction, tree planting in many parts of our country suffered huge losses, a large beetle of poplar was wiped out, and the power of this people has become very weak. Some agricultural natural disasters, when not unrelated to this. Shelter in the first generation after the fall, some areas still do not realize the importance of diversity, but instead a single pagoda tree, black locust, grafted Cassia, pine, etc., some of the woodland is still "a song in the end." Once a day pine rampant, our pure pine and poplar would be difficult to escape the same fate. No more pure fruit trees, fruit trees because distance is too large to effectively conserve soil and water. In addition, if the quality of large-scale development of sub-trees, not only will some of the famous drowned out, the fruit of the future market翻译市场行情价格多少钱 and farmers' income will have a bad effect. Good birds greener pastures. Not only birds of the species selective, insect versa. But also between birds and birds, insects and between insects, birds and insects both between allelopathy, alternate each other off phenomenon. The diversity of species of birds can be put back from, to create from the berries - birds - insects such as the food chain, reduce pests and diseases attack. So whether it is forest or grass, must implement the diversity of the law.Third, the law of the ecosystem material cycle. Ecosystem to the soil as a support, to establish a biological as the main water, soil, atmosphere, biology, etc. to participate in the logistics, energy flow loop system. Ecosystem material cycle is a continuous improvement of living environment, but also its structure more stable and orderly process, it is through this cycle, in order to allow ecosystems翻译价格标准 to perfect the various functions and normal play. Litter accumulation and nutrient supply to the forest's contribution is enormous. Solely on the prevention of erosion, water conservation role, can not be underestimated. Forest soil erosion under the effect does not occur, it is true, but long-term I do not know why. Nearly ten years before we know it mainly be attributed to the litter layer. The litter layer and the lower part of the formation of the "sponge layer" is like a large reservoir, in
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