Carbon Density of Quercus variabilis Natural Secondary Forest in Funiu Mountain
In this study,the carbon density size of Quercus variabilis natural secondary forest in Funiu mountain-ous were explored,in order to provide theoretical basis for estimating carbon density and reasonable management of Quercus variabilis natural secondary forest in Funiu mountainous.The allometric biomass equation was used to determine carbon density and its spatial variation.The results show that:①The carbon density of tree layer in-creased with the increase of slope position.The average carbon density were as follows:83.875 lt/hm2,93.402 7 t/hm2 and 101.1824 t/hm2.There were significant differences in carbon density of different nutrient organs,of which trunk accounted roughly for 46.8％,while leaf only accounted for 2.8％.The carbon density on sunny slopes was higher than that on shady slopes in different slope position,with a difference of up to 42.5 t/hm2 between south slope and north slope.② Between 400 and 1 000 m above sea level,the carbon density of Quercus variabilis natu-ral secondary forest in Funiu mountainous increased with the increase of altitude.The elevation range of highest carbon density was 900～1 000 m,but the vertical change was not significant,which might be related to the nar-row altitude range.In the Funiu Mountain,Quercus variabilis is a constructive species below an altitude of 1000m,whose carbon density increases with increasing altitude.The carbon density on sunny slopes is higher than that on shaded slopes due to the factors such as site environment and tree species characteristics.
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