水土保持学报2012，Vol.26Issue(1)：151-155,5.
丘陵陡坡荒山灌木草丛及其造林地生态系统碳库的分配格局
The Pattern of Ecosystem Carbon Stock in Steep Slope Wild Shrubs and Neighboring Forest Plantations in Hilly Red Soil Area
摘要
Abstract
Vegetation restoration is generally helpful to increase the ecosystem carbon stock,however the influences of wild shrubs afforestation on the amount and distribution pattern of ecosystem carbon stock in steep slope land are few understood.Wild shrubs and neighboring masson pine（Pinus massoniana） plantations of 19-year old were selected to study carbon stocks in different soil depths and plant modulates at upper,middle and lower slope positions in typical hilly steep slope land of Taihe county,Jiangxi province.The results showed that soil bulk density was lower in pine plantation than shrubs,and soil stone percentage negatively correlated with soil carbon concentration and density,which indicated that afforestation could improve soil physical structure,and soil carbon accumulation might be influenced by soil stone percentage.Soil carbon concentrations and stocks decreased with increasing depths in both shrubs and masson pine plantation,and their variability among upper,middle and lower slope positions varied with ecosystem types,but no differences in amounts were found between two ecosystem types.Ecosystem carbon stocks were 52.85,111.31 t/hm2 in shrubs and masson pine plantation,respectively,and both showed increasing tendency from upper,middle to lower slope positions.Meanwhile,the carbon stock in plant modulates to the total carbon stock was 11.2% and 59.5% in shrubs and masson pine plantation ecosystems,respectively.In sum,average carbon sink afforested masson pine on shrubs was 3.08 t/（hm2·a）,and the direct reason of afforestation carbon sink was the accumulation of forest plant biomass.It was suggested that planting fast-growing trees would be an efficient approach of carbon sink during the afforestation on poor stand condition.关键词
植被恢复/碳增汇/丘陵红壤/坡位/马尾松Key words
vegetation restoration/carbon sink/hilly red soil/slope position/Pinus massoniana分类
农业科技引用本文复制引用
陈伏生,张园敏,胡小飞,冯雪,任文,刘苑秋..丘陵陡坡荒山灌木草丛及其造林地生态系统碳库的分配格局[J].水土保持学报,2012,26(1):151-155,5.基金项目
国家自然科学基金项目 （）
留学归国人员科研启动基金 （）
