The paper summarized the meaning of post-evaluation for comprehensive benefits of forestry ecological programs, discussed and reviewed its development process in terms of content, indicators and methodologies, and fin...The paper summarized the meaning of post-evaluation for comprehensive benefits of forestry ecological programs, discussed and reviewed its development process in terms of content, indicators and methodologies, and finally presented its development trend from the perspectives of theoretical research, methodological research and application research.展开更多
Data were collected from Three-north Region, Middle and upper reaches region of Yangtze River and Coastal region. By analysis of factors influencing soil erosion, the longitude, latitude, annual precipitation, and the...Data were collected from Three-north Region, Middle and upper reaches region of Yangtze River and Coastal region. By analysis of factors influencing soil erosion, the longitude, latitude, annual precipitation, and the slope degree were selected as regional independent variables and canopy density and stock litter were selected as independent variables, and integral diffusing models were established for evaluation of the benefit of soil and water conservation of forest. By solving the parameters of models using the package of STATISTICA, the Power function between independent variables and dependent variables was set up. The soil conservation amount of forest and economic values were estimated using the contrast method for the ecological forestry engineering of the above three areas.展开更多
After analysis on the current situation of international forestry, this paper proposes that integration, coordination and sustainable development will be the general developing trend of forest in China, and commercial...After analysis on the current situation of international forestry, this paper proposes that integration, coordination and sustainable development will be the general developing trend of forest in China, and commercial forest, ecological forest and community forest should be organically combined with integrative development and sustainable development in rural areas. This paper focuses especially on clarifying the importance of community forest to the social development or rural areas, and emphasizes tha...展开更多
Variable retention harvesting evolved in the Douglas-fir region of the Pacific Northwest gradually in response to increasing dissatisfaction with the ecological consequences of clear-cutting,from the standpoint of wil...Variable retention harvesting evolved in the Douglas-fir region of the Pacific Northwest gradually in response to increasing dissatisfaction with the ecological consequences of clear-cutting,from the standpoint of wildlife habitat and other important forest functions.It is a harvesting technique that can provide for retention(continuity)of such structures as large and old live trees,snags,and logs.Variable retention is based on the natural model of the biological legacies that are typically left behind following natural disturbances,such as wildfire,wind,and flood.Variable retention is also an important technique for fulfilling the first silvicultural principle of ecological forestry,that of providing for continuity in structure,function,and composition between forest generations.The history and current application of variable retention approaches on forests in western Washington and Oregon states(USA),where many of the fundamental concepts were first developed and applied,is described in this article.展开更多
基金supported by National Nature Science Fund (70373001)China Postdoctoral Science Fundation (20060400533)
文摘The paper summarized the meaning of post-evaluation for comprehensive benefits of forestry ecological programs, discussed and reviewed its development process in terms of content, indicators and methodologies, and finally presented its development trend from the perspectives of theoretical research, methodological research and application research.
文摘Data were collected from Three-north Region, Middle and upper reaches region of Yangtze River and Coastal region. By analysis of factors influencing soil erosion, the longitude, latitude, annual precipitation, and the slope degree were selected as regional independent variables and canopy density and stock litter were selected as independent variables, and integral diffusing models were established for evaluation of the benefit of soil and water conservation of forest. By solving the parameters of models using the package of STATISTICA, the Power function between independent variables and dependent variables was set up. The soil conservation amount of forest and economic values were estimated using the contrast method for the ecological forestry engineering of the above three areas.
文摘After analysis on the current situation of international forestry, this paper proposes that integration, coordination and sustainable development will be the general developing trend of forest in China, and commercial forest, ecological forest and community forest should be organically combined with integrative development and sustainable development in rural areas. This paper focuses especially on clarifying the importance of community forest to the social development or rural areas, and emphasizes tha...
基金Different projects from national and international calls between 1997 to date.
文摘Variable retention harvesting evolved in the Douglas-fir region of the Pacific Northwest gradually in response to increasing dissatisfaction with the ecological consequences of clear-cutting,from the standpoint of wildlife habitat and other important forest functions.It is a harvesting technique that can provide for retention(continuity)of such structures as large and old live trees,snags,and logs.Variable retention is based on the natural model of the biological legacies that are typically left behind following natural disturbances,such as wildfire,wind,and flood.Variable retention is also an important technique for fulfilling the first silvicultural principle of ecological forestry,that of providing for continuity in structure,function,and composition between forest generations.The history and current application of variable retention approaches on forests in western Washington and Oregon states(USA),where many of the fundamental concepts were first developed and applied,is described in this article.
