Abstract:

In this study,the airborne LiDAR technology was used to investigate the stand factors of the Cunninghamia lanceolata plantation in Nanyuntai Forest Farm.Based on the survey results,the biomass and carbon storage were estimated using the biomass equation method combined with the carbon coefficient,in order to provide a basis for the management of Cunninghamia lanceolata' and the development of carbon sequestration and sink increase activities.The results indicate that 1) y=4.6642 {{\mathrm{e}}^{0.1237}}^x(R²=0.801 2) is the optimal inversion equation for diameter at breast height(DBH);2) The carbon storage of Cunninghamia lanceolata plantation increased with the increase of DBH class,and its aboveground carbon storage 4.31~72.79 t/hm²) was significantly higher than underground carbon storage 1.17~21.44 t/hm²),accounting for absolute advantage in the whole plant carbon storage(5.48~94.23 t/hm²);3) Comparing the multiple relationship of carbon storage of the whole plant among different DBH groups,the medium DBH group is 3.4 times of the small DBH group;The large DBH group is 2.68 times larger than the medium DBH group;The extra large DBH group is 1.89 times of the large DBH group,and the growth rate is gradually decreasing;4) From the distribution of carbon storage in different organs of Cunninghamia lanceolata,the carbon storage in the trunk and branches increases with the increase of DBH class,while the leaves decrease with the increase of DBH class.

Key words: LiDAR, Cunninghamia lanceolata, carbon sink, carbon storage