血水草生物量及碳贮量分布格局  

Biomass and distribution pattern of carbon storage in Eomecon chionantha Hance

作　　者：田大伦[1,2,3] 闫文德[1,2,3] 梁小翠[1,2,3] 刘铭[4] 

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]国家野外科学观测研究站,会同418307 [4]湖南师范大学,长沙410081

出　　处：《生态学报》2013年第13期4165-4171,共7页Acta Ecologica Sinica

基　　金：国家林业公益性行业科研专项(201104009);湖南省科技厅项目(2011NK3049);湖南省教育厅项目(湘财教字[2010]70号);长沙市科技局创新平台项目(K1003009-61)

摘　　要：采用样方收获法,利用实测数据,研究了湖南桃江血水草的生物量、碳含量、碳贮量及其分配特征。结果表明,血水草生物量为1744.70 kg/hm2,其中以地下根系生物量最高,为1278.63 kg/hm2,占血水草生物量的73.9%,且地下根系部分生物量与地上叶、茎部分生物量比值为2.74。血水草各器官平均碳含量为450.54 g/kg,从高到低排序为叶>茎>根。土壤层有机碳含量为6.63—38.50 g/kg,各层次碳含量分布不均,表层(0—15cm)土壤碳含量较高,并随土壤深度的增加而逐渐下降。生态系统碳贮量为101.19 t/hm2,碳库的分布格局为土壤层>植被层>枯落物层。植被层的碳贮量为0.79 t/hm2,占整个生态系统总碳贮量的0.78%;在植被层中,地下根系碳贮量为0.57 t/hm2,占植被层总碳贮量的72.2%,是植被层的主要碳库。枯落物层碳贮量较少,为0.22 t/hm2,仅占整个生态系统的0.22%,它是维系植物体地上碳库与土壤碳库形成循环的主要通道。血水草生态系统中的碳贮量绝大部分集中在土壤中,土壤层碳贮量可观,为100.18 t/hm2,占系统总碳贮量的99.0%,是血水草生态系统中的主要碳库。研究结果,可为深入研究亚热带地区草本植物的生态功能提供参考。Through sample plot harvesting and measured data,biomass,content,storage and spatial distribution of carbon in medicinal plants Eomecon chionantha Hance were investigated in Taojiang,Hunan province.Results showed the biomass of Eomecon chionantha Hance was 1744.70 kg/hm^2,and root biomass was 1278.63 kg/hm^2,which was highest and accounted for 73.9%.And the biomass ratio of underground（root） and aboveground（leaf and stem） was 2.74.The average carbon content was 450.54 g/kg for different organs of Eomecon chionantha Hance and decreased in the order leafstemroot.Carbon content ranged from 6.63 to 38.50 g/kg in the soils.Carbon content in 0—15cm depth was the highest,and it gradually decreased with the increase of soil depth.Carbon storage in ecosystem was 101.19 t/hm^2.Carbon stocks in the different components of the studied ecosystems were in an order as： soil vegetation litterfall.Carbon storage was 0.79 t/hm^2 in vegetation layer,which accounted for 0.78% in the whole ecosystem.In vegetation layer,carbon storage in underground root was 0.57 t/hm^2,which accounted for 72.2% and was the largest carbon pool in the vegetation layer.Carbon storage was 0.22 t/hm^2 in litter layer,which only accounted for 0.22% in the whole ecosystem.And litter layer was the main channel connecting plant aboveground and soil carbon pool.Most of carbon stored in soil in Eomecon chionantha Hance ecosystem,and soil carbon storage was 100.18 t/hm^2,which accounted for 99.0% in total carbon storage,and was the main carbon pool in Eomecon chionantha Hance ecosystem.The results will provide reference for further research on ecological functions of herbaceous plant in subtropical area.

关 键 词：生物量 碳含量 碳贮量 血水草 湖南桃江 

分 类 号：Q948[生物学—植物学]