Firstly,the problems of the protection and sustainable development of forestry resources were analyzed,such as lack of overall planning for the protection of forestry resources,insufficient investment in the protectio...Firstly,the problems of the protection and sustainable development of forestry resources were analyzed,such as lack of overall planning for the protection of forestry resources,insufficient investment in the protection of forestry resources,etc.Afterwards,the corresponding countermeasures were proposed,such as making overall planning for sustainable forestry development,increasing the investment in the protection of forestry resources,improving the forestry management system,etc.展开更多
Forestry resources play an important role in China's economic construction and development. Strengthening the management of forestry resources is the main content of the construction of social ecological civilizat...Forestry resources play an important role in China's economic construction and development. Strengthening the management of forestry resources is the main content of the construction of social ecological civilization. Strengthening the management of forestry resources is an important way to realize the harmonious coexistence between human beings and nature, rational development and utilization of forestry resources. It is an important measure to realize the sustainable development of our country's economy to protect the forestry resources by effective means, to carry out the forestry forestation project in the over-reclaimed forestry area and to continuously expand the forestry coverage area. Forestry resources are closely related to people's production and life. They not only provide people with important resources, but also have great ecological benefits in improving the ecological environment and regulating the climate. With the exploitation and utilization of forestry resources in large quantities, a series of environmental problems have been caused, such as landslides, mudslides and so on. The total amount of forestry resources has gradually decreased and the coverage rate has decreased. It is of certain practical significance for relevant departments to strengthen the management and attention of forestry resources and continuously carry out forestry afforestation projects. This paper analyzes the related contents of forestry resources management and forestry afforestation for reference only.展开更多
In this paper,a nonlinear mathematical model is proposed and analyzed to study the depletion of forestry resources caused simultaneously by population and population pressure augmented industrialization.The control of...In this paper,a nonlinear mathematical model is proposed and analyzed to study the depletion of forestry resources caused simultaneously by population and population pressure augmented industrialization.The control of population pressure,using economic efforts is also considered in the modeling process.It is assumed that cumulative biomass density of forestry resources and the density of population follow logistic models.It is further assumed that the density of population and the level of industrialization increase as the cumulative biomass density of forestry resources increases.The cumulative density of economic efforts,which are applied to control the population pressure,is considered to be proportional to the population pressure.The model analysis shows that as the population pressure increases,the level of industrialization increases leading to decrease in the cumulative biomass density of forestry resources.It is found that if population pressure is controlled by using some economic efforts,the decrease in cumulative biomass density of forestry resources can be made much less than the case when no control is applied.It is also noted that if the population pressure augmented industrialization increases without control,the forestry resources may become extinct.展开更多
The present situation of forest tree genetic germplasm resources research and conservation in China is introduced which including the background, decision-making of conservation strategies and principles, the plan of ...The present situation of forest tree genetic germplasm resources research and conservation in China is introduced which including the background, decision-making of conservation strategies and principles, the plan of area division and tree species classification, the sample strategy of germplasm conservation, the advances in conservation pattern and related technologies research, the achievements of germplasm conservation and utilization in China, and the problems to be solved. The recent achievements a...展开更多
文摘Firstly,the problems of the protection and sustainable development of forestry resources were analyzed,such as lack of overall planning for the protection of forestry resources,insufficient investment in the protection of forestry resources,etc.Afterwards,the corresponding countermeasures were proposed,such as making overall planning for sustainable forestry development,increasing the investment in the protection of forestry resources,improving the forestry management system,etc.
文摘Forestry resources play an important role in China's economic construction and development. Strengthening the management of forestry resources is the main content of the construction of social ecological civilization. Strengthening the management of forestry resources is an important way to realize the harmonious coexistence between human beings and nature, rational development and utilization of forestry resources. It is an important measure to realize the sustainable development of our country's economy to protect the forestry resources by effective means, to carry out the forestry forestation project in the over-reclaimed forestry area and to continuously expand the forestry coverage area. Forestry resources are closely related to people's production and life. They not only provide people with important resources, but also have great ecological benefits in improving the ecological environment and regulating the climate. With the exploitation and utilization of forestry resources in large quantities, a series of environmental problems have been caused, such as landslides, mudslides and so on. The total amount of forestry resources has gradually decreased and the coverage rate has decreased. It is of certain practical significance for relevant departments to strengthen the management and attention of forestry resources and continuously carry out forestry afforestation projects. This paper analyzes the related contents of forestry resources management and forestry afforestation for reference only.
基金the financial assistance in the form of Senior Research Fellowship(09/013(0267)/2009-EMR-I).
文摘In this paper,a nonlinear mathematical model is proposed and analyzed to study the depletion of forestry resources caused simultaneously by population and population pressure augmented industrialization.The control of population pressure,using economic efforts is also considered in the modeling process.It is assumed that cumulative biomass density of forestry resources and the density of population follow logistic models.It is further assumed that the density of population and the level of industrialization increase as the cumulative biomass density of forestry resources increases.The cumulative density of economic efforts,which are applied to control the population pressure,is considered to be proportional to the population pressure.The model analysis shows that as the population pressure increases,the level of industrialization increases leading to decrease in the cumulative biomass density of forestry resources.It is found that if population pressure is controlled by using some economic efforts,the decrease in cumulative biomass density of forestry resources can be made much less than the case when no control is applied.It is also noted that if the population pressure augmented industrialization increases without control,the forestry resources may become extinct.
文摘The present situation of forest tree genetic germplasm resources research and conservation in China is introduced which including the background, decision-making of conservation strategies and principles, the plan of area division and tree species classification, the sample strategy of germplasm conservation, the advances in conservation pattern and related technologies research, the achievements of germplasm conservation and utilization in China, and the problems to be solved. The recent achievements a...
