The northeastern China, the United States, and the western Europe are important agricultural regions both on the global and regional scales. The westem Europe has a longer history of agricultural land development than...The northeastern China, the United States, and the western Europe are important agricultural regions both on the global and regional scales. The westem Europe has a longer history of agricultural land development than the eastem United States. These two regions have changed from the deforestation and reclamation phase in the past to the current land abandonment and reforestation phase. Compared with the two regions, large-scale land exploitation has only been practiced in the northeastern China during the last century. After a short high-intensity deforestation and reclamation period, agricultural and forest lands are basically in a dynamic steady state. By comparing domestic and international agro-forestry development and considering the ecological environment and socio-economic bene- fits that can be derived from agro-forestry, this paper suggests that large area of reforestation would be inevitable in future though per- sistent and large agricultural demand in coming decades even more. And local reforestation at slope farmland with ecological vulner- ability should be imperative at present to avoid severer damage. At the same time, from the perspective of Land Change Science, the results demonstrate that the research on land use change in the agro-forestry ecotone is typical and critical, particularly those dealing with the analysis of spatial and temporal characteristics and the simulation of climate, hydrology, and other environmental effects.展开更多
The sustained growth of Chinese economy in the new century is a silver lining in the continuouslydepressed global economy. Meanwhile, the rapid development of Chinese economy is still confronted withconstraints from d...The sustained growth of Chinese economy in the new century is a silver lining in the continuouslydepressed global economy. Meanwhile, the rapid development of Chinese economy is still confronted withconstraints from deteriorating environment and rural poverty issues. It has become a significant policyoption in maintaining high speed, efficiency and sound development of Chinese economy to rehabilitateforest resources, improve ecological conditions, increase farmers income and get on a sustainable roadfeaturing coordinated development of population, resources and environment. The Grain for Green Program,as a CDM activity of Chinese style, launched on trial in 1999 and implemented in 2002 across the country,is the biggest land use transition, watershed management and poverty alleviation program involving thelargest population in Chinese history and across the globe. It covers 25 provinces/regions/cities and gets over1 600 counties, 15 million households and 60 million farmers were involved. Hence the Grain for Tree policyhas a significant bearing on ecological protection and farmers poverty alleviation in the soil and watererosion-prone region. A review and assessment of the background, essentials, effects, problems and trend ofthe Grain for Tree policy is of great significance for both China and the other developing countries in theworld in their efforts to combat the deteriorating environment and alleviate poverty.展开更多
基金Under the auspices of Strategic Pilot Science and Technology Projects of Chinese Academy of Sciences (No.XDA05090310)
文摘The northeastern China, the United States, and the western Europe are important agricultural regions both on the global and regional scales. The westem Europe has a longer history of agricultural land development than the eastem United States. These two regions have changed from the deforestation and reclamation phase in the past to the current land abandonment and reforestation phase. Compared with the two regions, large-scale land exploitation has only been practiced in the northeastern China during the last century. After a short high-intensity deforestation and reclamation period, agricultural and forest lands are basically in a dynamic steady state. By comparing domestic and international agro-forestry development and considering the ecological environment and socio-economic bene- fits that can be derived from agro-forestry, this paper suggests that large area of reforestation would be inevitable in future though per- sistent and large agricultural demand in coming decades even more. And local reforestation at slope farmland with ecological vulner- ability should be imperative at present to avoid severer damage. At the same time, from the perspective of Land Change Science, the results demonstrate that the research on land use change in the agro-forestry ecotone is typical and critical, particularly those dealing with the analysis of spatial and temporal characteristics and the simulation of climate, hydrology, and other environmental effects.
文摘The sustained growth of Chinese economy in the new century is a silver lining in the continuouslydepressed global economy. Meanwhile, the rapid development of Chinese economy is still confronted withconstraints from deteriorating environment and rural poverty issues. It has become a significant policyoption in maintaining high speed, efficiency and sound development of Chinese economy to rehabilitateforest resources, improve ecological conditions, increase farmers income and get on a sustainable roadfeaturing coordinated development of population, resources and environment. The Grain for Green Program,as a CDM activity of Chinese style, launched on trial in 1999 and implemented in 2002 across the country,is the biggest land use transition, watershed management and poverty alleviation program involving thelargest population in Chinese history and across the globe. It covers 25 provinces/regions/cities and gets over1 600 counties, 15 million households and 60 million farmers were involved. Hence the Grain for Tree policyhas a significant bearing on ecological protection and farmers poverty alleviation in the soil and watererosion-prone region. A review and assessment of the background, essentials, effects, problems and trend ofthe Grain for Tree policy is of great significance for both China and the other developing countries in theworld in their efforts to combat the deteriorating environment and alleviate poverty.
