Study of City Forest Carbon-Sink Benefit Based on Ecological Alternation Idea

The forest carbon-sink is one part of forest ecological benefit and an important index for evaluation the forest city establishment. In this paper, with the background of city forest city establishment, the Chinese fir plantation, masson pine forest, foreign pine forest, fast-growing broad-leaf forest, medium-growing broad-leaf forest, slow-growing broad-leaf forest and other types of forest are set as objects to carry out the analysis on influencing factors of forest carbon-sink benefit in a city through main analyzing methods including stock volume method and carbon tax method based on-investigation on second type of forest‖ in 2015 and laboratory experimental data combined with the national evaluation index system for forest city. As a result, the main tree species and forest communities with high carbon fixation ability and good carbon-sink benefit are selected, which provides support data and theoretical foundation for establishment of national forest city and reasonable utilization of forestry resources.