岳麓山枫香风景林碳汇效应研究

岳麓山枫香林既是长沙市城市森林主要的组成部分，又是我国四大观赏红叶的风景林之一。开展岳麓山枫香风景林碳汇效应研究对系统评价和科学管理长沙城区重要风景林资源意义重大。采用样地实测结合相对生长模型的方法对岳麓山枫香风景林碳汇效应进行研究，建立枫香风景林各器官生物量的最优模型，估算根、干、枝、叶的碳储量及总碳储量和碳密度。结果表明，枫香林分林木径阶在6.1~46 cm时，各器官碳储量大小依次为树干＞树根＞树枝＞树叶；林木径阶>46 cm时，各器官碳储量大小依次为树干＞树枝＞树根＞树叶。岳麓山枫香风景林最优碳汇量生长拟合方程为C=0.124D^2.258（R²=0.985）。平均碳汇速率随胸径增大而增大。岳麓山枫香风景林的碳汇效应较大，样地平均碳储量为8.70 t，平均碳密度为96.69 t/hm²，对改善城区人居环境作用明显。

Carbon Sink Effect of Liquidambar formosana in Yuelu Mountain

Liquidambar formosana forest occurring in Yuelu Mountain,Changha,the capital of Hunan Province is known as the main component of the forest system of the city,it is also one of the four red-leaf scenic forests in China.It is of great importance to study the carbon sink effects of L.formosana forest in Yuelu Mountain for scientifically evaluating and managing scenic forest resources in Changsha.The carbon sink effects of L.formosana in Yuelu Mountain were investigated and analyzed by using field investigation and relative growth models.Optimal models describing biomasses of different organs of L.formosana forest were established.Carbon storages of the root,trunk,branch,and leaf,as well as the total storage were estimated by using the established models.For the L.formosana forest with the diameter range of 6.1-46 cm,the carbon storages of different organs were in the order of trunk> root> branch> leaf.For those with diameter above 46 cm,the order was trunk> branch> root> leaf.Fitting equation of carbon sinks in the study area was C=0.124D^2.258,(R²=0.985).The average carbon sequestration rate increased with diameter.L.formosana forest in Yuelu Mountain demonstrated a large carbon sink capacity,the average carbon storage in each sampling plot was about 8.70 t,the average carbon density was 96.69 t/hm²,indicating that the forest significantly improved the urban living environment.