Vol17 No.4: 919-930
【Title】Plantation transformation alternatives determine carbon sequestration capacity – a case study with Pinus massoniana in southern China
【Author】RUAN Lu-ping1; LU Yuan-chang2; MENG Jing-hui1*
【Addresses】1 Research Center of Forest Management Engineering of National Forestry and Grassland Administration, Beijing Forestry University, Beijing 100083, China. 2 Institute of Forest Resource and Information Techniques, Chinese Academy of Forestry, Beijing 100091, China.
【Corresponding author】MENG Jing-hui
【Citation】Ruan LP, Lu YC, Meng JH (2020) Plantation transformation alternatives determine carbon sequestration capacity – a case study with Pinus massoniana in southern China. Journal of Mountain Science 17(4). https://doi.org/10.1007/s11629-019-5411-1
【Abstract】It is widely accepted that global warming, which results from the increase of carbon dioxide (CO2) in the atmosphere, has a negative impact on human beings. Forests are the largest terrestrial ecosystem and play an important role in carbon sequestration. Many studies have documented that a mixed-species forest can sequester more carbon than single species forests, depending on the site conditions. Therefore, uneven-aged mixed-species forest management has been receiving more and more attention. In 2008, an experiment with five silvicultural models for Pinus massoniana (Chinese red pine) plantation, i.e., four transformation treatments(A1-A4)and one control treatment(A5) was conducted in the Experimental Center of Tropical Forestry of Chinese Academy of Forestry in Pingxiang City, in southwestern Guangxi Zhuang Autonomous Region, southern China. The four transformation treatments (A1-A4) enriched Castanopsis hystrix, Manglietia glance, Erythrophleum fordiiand Quercus griffithii with differed richness and composition after thinning (removed 70% of trees), while no silvicultural treatment was used in the control treatment A5. In this study, we compared the carbon sequestration capacity of these five silvicultural models based on periodic annual increment and growth rate. Our results indicated that all the transformation treatments performed significantly better in carbon sequestration than the control treatment. A significant difference was also observed amongst the transformation treatments. Moreover, the transformation treatment A1 with enrichment species Castanopsis hystrix (350 trees∙ha−1) and Manglietia glance(350trees∙ha−1) was determined to be the optimal model for maximum carbon sequestration because of its high tree-level growth rate and high economic value of enriched plantings, which could be popularized in other places. Our results further confirmed that management using mixed-species forests is a better approach to combat climate change than using monoculture forests.
【Keywords】Global warming; Carbon sequestration; Mixed-species forest; Silvicultural model; Single-species (monoculture) forest