Natural spruce-fir mixed stand is one of the main forest types in the world,and also has huge ecological,economic and social benefits.According to the structural characteristics and succession laws of natural spruce-f...Natural spruce-fir mixed stand is one of the main forest types in the world,and also has huge ecological,economic and social benefits.According to the structural characteristics and succession laws of natural spruce-fir forest,it is urgent and significant to develop scientific management measures for natural spruce-fir mixed stand in line with local conditions.The article outlined the characteristics of the distribution and structure, regeneration and succession laws of natural spruce-fir forest,and analyzed the current situation and existing problems of natural spruce-fir forest management.The following recommendations were eventually made:1) In no cutting area,all logging activities should be banned.In a restricted cutting area,the cutting intensity should be generally controlled within 15%of the stock volume before cutting.On the commodity forest management area, the appropriate cutting intensity should be determined according to the volume per hectare,determine and classification management should be implemented in accordance with the characteristics of forest,to ensure the scientific selective cutting.2) Closure for afforestation,planting and repair planting should be adopted on vegetation-intensive land,sparse shrubs covered land and harvesting slash,in order to accelerate natural regeneration.3) The in situ conservation should be conducted in nature reserves and scientific experiment stations of rare and endangered species,such as Abies chensiensis,Picea neoveitchii,Abies vuanbaoshanensis,to reduce human destruction.4) It is supposed to collect seeds in time,establish nursery,actively establish forest, expand artificial population and promote natural regeneration.展开更多
The growth process of Chinese fir trees under the pattern of reserving broad leaved tree species in Chinese fir plantation and in pure Chinese fir stand(control) were studied. The results showed that comparing with th...The growth process of Chinese fir trees under the pattern of reserving broad leaved tree species in Chinese fir plantation and in pure Chinese fir stand(control) were studied. The results showed that comparing with the control, the tree height, D.B.H and tree volume increment of Chinese fir under the pattern was a little slower in the early seven years and higher at 8～22 5 year old. After 22 5 year old the increment declined hardly (though total increment was higher than the control). All these reflected the effect of tree competition and soil fertility development on the tree growth of Chinese fir. In order to cultivate large timber under the pattern, the relationship of Chinese fir and broad leaved tree species must be adjusted in time and the broad leaved trees existed in the same forest canopy with Chinese fir must be cut over at about 20 year old.展开更多
文摘Natural spruce-fir mixed stand is one of the main forest types in the world,and also has huge ecological,economic and social benefits.According to the structural characteristics and succession laws of natural spruce-fir forest,it is urgent and significant to develop scientific management measures for natural spruce-fir mixed stand in line with local conditions.The article outlined the characteristics of the distribution and structure, regeneration and succession laws of natural spruce-fir forest,and analyzed the current situation and existing problems of natural spruce-fir forest management.The following recommendations were eventually made:1) In no cutting area,all logging activities should be banned.In a restricted cutting area,the cutting intensity should be generally controlled within 15%of the stock volume before cutting.On the commodity forest management area, the appropriate cutting intensity should be determined according to the volume per hectare,determine and classification management should be implemented in accordance with the characteristics of forest,to ensure the scientific selective cutting.2) Closure for afforestation,planting and repair planting should be adopted on vegetation-intensive land,sparse shrubs covered land and harvesting slash,in order to accelerate natural regeneration.3) The in situ conservation should be conducted in nature reserves and scientific experiment stations of rare and endangered species,such as Abies chensiensis,Picea neoveitchii,Abies vuanbaoshanensis,to reduce human destruction.4) It is supposed to collect seeds in time,establish nursery,actively establish forest, expand artificial population and promote natural regeneration.
文摘The growth process of Chinese fir trees under the pattern of reserving broad leaved tree species in Chinese fir plantation and in pure Chinese fir stand(control) were studied. The results showed that comparing with the control, the tree height, D.B.H and tree volume increment of Chinese fir under the pattern was a little slower in the early seven years and higher at 8～22 5 year old. After 22 5 year old the increment declined hardly (though total increment was higher than the control). All these reflected the effect of tree competition and soil fertility development on the tree growth of Chinese fir. In order to cultivate large timber under the pattern, the relationship of Chinese fir and broad leaved tree species must be adjusted in time and the broad leaved trees existed in the same forest canopy with Chinese fir must be cut over at about 20 year old.
基金Foundation item:This paper was supported by Natural Science Foundation of Fujian Province (B0110025) and Foundation for University Key Teacher by the Ministry of Education.
