长沙市4种人工林生态系统碳储量与分布特征  

Carbon storage and sequestration in four urban forest ecosystems in Changsha,Hunan

作　　者：余蓉[1,2] 项文化[1,2,3] 宁晨[1,2] 罗赵慧[1,2] 

机构地区：[1]中南林业科技大学,长沙410004 [2]南方林业生态应用技术国家工程实验室,长沙410004 [3]湖南会同杉木林生态系统国家野外科学观测研究站,会同418307

出　　处：《生态学报》2016年第12期3499-3509,共11页Acta Ecologica Sinica

基　　金：国家林业公益性行业科研专项(201104009);湖南省高校创新平台建设项目(湘财教字[2010]70号);长沙市科技局能源研发平台建设项目(K1003009-61)

摘　　要：采用标准地调查和生物量实测方法,研究了长沙市区4种人工林生态系统生物量、碳储量及其分布特征。结果表明:马尾松林、杉木林、毛竹林和杨树林生态系统生物量分别为135.390、100.578、64.497、63.381 t/hm^2;林下植被及死地被物层分别为18.374、22.321、1.847 t/hm^2和2.602 t/hm^2。乔木层林木各器官含碳率为0.405—0.551 g C/g,林下植被层为0.421—0.518 g C/g,死地被物层为0.230—0.545 g C/g,土壤层有机碳含量为15.669—19.163 g C/kg。4种人工林生态系统总碳储量为208.671、176.723、149.168 t/hm^2和164.735 t/hm^2,其中植被层为32.789—67.8661 t/hm^2;死地被物层为0.394—6.163 t/hm^2;土壤层为134.642、116.911、115.985 t/hm^2和126.860 t/hm^2。4种森林年净固碳量为15.167 t hm-2a-1,固定CO_2量55.602 t hm-2a-1。研究结果可为深入研究城市森林碳平衡提供基础数据。Forests are important contributors to the global carbon（ C） cycle because they store large quantities of C in the vegetation and soil,and exchange CO_2 actively with the atmosphere through photosynthesis and respiration. Urban forests are a critical part of green infrastructure that not only maintains the health and quality of life in the cities,but also provides many ecosystem services,such as C sequestration in urban areas. In the present study,the quantity and distribution of vegetation biomass,C content and C storage were investigated in four types of forests（ Masson pine forests,Chinese fir forests,Bamboo forests,and Poplar forests） in Changsha City,Hunan Province. The C sequestration capacity was also estimated for the four forest ecosystems. The results showed that the biomass of overstory vegetation was 135.390,100.578,64.497,and 63.381 t / hm^2 in masson pine,Chinese fir,bamboo and poplar forests,respectively. Stem had the highest,whereas fine root had the lowest proportion of overstory biomass among the different organs for all examined forests. The biomass was 18.374,22.321,1.847,and 2.602 t / hm^2 in understory vegetation and litter layers in masson pine,Chinese fir,bamboo,and poplar forests,respectively. On average,C content was found in the range of 0. 405—0. 551 g C / g inoverstory vegetation with specifically ranging of 0.405—0.516,0.458—0.509,0.405—0.527,and 0.454—0.551 g C / g in masson pine,Chinese fir,bamboo,and poplar forests,respectively. Average C content ranged between 0.421—0.518 g C / g in understory vegetation,0.230—0.545 g C / g in litter layer,and 15.669—19.163 g C / g in the soil. The C content of soils under the four forest types decreased with increasing soil depth. The total C storage was 208. 67,176. 723,149. 17 and164.74 t / hm^2 in masson pine,Chinese fir,bamboo,and poplar forest ecosystems,respectively. Of which,the largest proportion of the total C storage was found in the soils that contained 134.64,116.91,115.99,and 126.86 t / hm^2 in the correspondi

关 键 词：生物量 碳含量 碳储量 城市人工林 长沙市 

分 类 号：S718.5[农业科学—林学]