The ecological mechanism of urban green space is introduced, and the distribution mode of the green space is discussed. Through the urban green space system planning practice of Chayuan new district in Chongqing, the application of the ecological principle in green space planning practice is explored.
The method could not only prevent riparian from collapse and erosion but also introduce the ecological principle to the riparian engineering planning for creating the living space for plants,animals and micro-organism,which can restore the original communities of P.australi rapidly.
Based on the present greening situation of expressway in Hebei province,the paper elaborated the ecological principle and the basic ecological restore principle in the virescence design of expressway,and proposed the principle of ecological virescence design for expressway and explained briefly the ecological virescence design scheme of expressway in different site conditions.
Based on the ecological principle,this article takes the example of water in the mine well to give discussions on the development and utilization of new energy sources and eco-environmental protection.
Through the discussion on the ecological principle,mode and technical key points,this paper gives a full explanation to the advantage and feasibility of this mode.
Economical criminal law means that leads the ecological principle into the study on environmental problem in the place of criminal law and sets up the criminal law system which accords with the ecological law to solve the environmental problem between the people and the nature.
As a composite eco-system, Urban Residential ecological environment should abide by the ecological principle which requires harmonious symbiosis of the natural, social and economic ecology.
The ecological principle of interdependence has been a guiding theme in our research and conceptualization.
The ecological principle of evolutionary reconstruction as illustrated by marine animals
In short, the ecological principle of carrying capacity quickly becomes evident.
The loess plateau is located in the middle reaches of the Huanghe Rivar inthe central part of China with a total area of ahout 530,000km~2. of whichthe eroded area reaches about 430,000km~2. The grievous water and soil erosionin history not only caused the ecological enviornmant in this region to becomeworse gradually and an all-round degradation of agriculture, forestry andanimal hushandry but also brought about serious threat to the regrons in thelower reaches of the Huanghe River.After the founding...
The loess plateau is located in the middle reaches of the Huanghe Rivar inthe central part of China with a total area of ahout 530,000km~2. of whichthe eroded area reaches about 430,000km~2. The grievous water and soil erosionin history not only caused the ecological enviornmant in this region to becomeworse gradually and an all-round degradation of agriculture, forestry andanimal hushandry but also brought about serious threat to the regrons in thelower reaches of the Huanghe River.After the founding of the New China,the Party and tha People's.Governmenthave paid great attention to the protection and control of water and soil erosionin this region,and also worked out a series of principles and done much workon large-scale water and soil protection and water and soil conservation research.Thus,great achievements have been obtained. And yet, judging from requirementsof the integrated control and prevetion of water and soil erosion on the loessplateau,work done has not obtained realistic effects In order to do aneffective work in this respect, based on our many years' experiences andsummary of the historical experience, we hold that much work has to be doneon the following respects:(1)Every.means possible should be tried to keep the ecological balance so as to obtain the prevetion of water and soil loss on the loess plateau.(2) In order to keep the ecological balance, the integrated control of waterand soil loss must be conducted.(3) Implemention of ratfionul land use and approaches of improving landproductivity can be closely associated with each other.(4) A good job must be done in the basic measure such as planting treesand grasses in the integrated control of water and soil erosion.(5) In the loess hilly and gully regions, grassland dovelopment, artificialplanting grasses and converted land planted to grasses should be mostly insistedon in planting grasses and trees While attention must also be paid to thetransformation of farming systems.All in all, the nermanent confrol of water and soil erosion on the loessplateau must follow the ecological principles in order to obtaine its objective.
In the last few years, scientific research and controlling practices on the problems of desertification strengthened furtherly the concrete theoritical researches on the issues and provided a good foundation for the detail rec g-nization of the importance of the worldwide concerned problem. It is attempted to discuss the ecological principles of desertification process and its rehabilitating measures, and it is expected to evoke a heated discussion and bring relevant scientists' attention and interests...
In the last few years, scientific research and controlling practices on the problems of desertification strengthened furtherly the concrete theoritical researches on the issues and provided a good foundation for the detail rec g-nization of the importance of the worldwide concerned problem. It is attempted to discuss the ecological principles of desertification process and its rehabilitating measures, and it is expected to evoke a heated discussion and bring relevant scientists' attention and interests on the problem, with the presentation of superficial opinions, and benefit from different viewpoints on the disasters. Definitionally, desertification resides its meaning in the network of alternative interactions amongst natural environment, biology and human society and the desertification is originated in the processes of dislocation of the interrelation among above-mentioned three aspects.
Stereoscopic agriculture (SA) is an important way of solving the problems of big population and Small land in our country,which has wide developing prospect.In order to make SA develop scientificly,this paper has discussed the character of SA structure and the ecological principles of its construction, and illustrated the design of SA structure by taking the rainfed agriculture in the loess hilly and gnlly region of northwestern area as an example.
the ecological principle
生态学原理
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