摘要
研究喀斯特地区4种植被恢复模式幼林生态系统碳含量、碳储量及其空间分布特征。结果表明:不同树种同一器官中的碳含量存在差异;同一树种不同器官中的碳含量也不同,除楸树外,3种树地上部分各器官的碳含量普遍高于地下部分(根);不同树种各器官碳含量的变异系数为0.88%～7.02%;林下灌木层、草本层、死地被物层的平均碳含量分别为309.70～461.02,335.44～569.61和307.01～400.88g·kg-1,植被恢复初期,柏木林地、楸树林地土壤有机碳含量分别比对照地提高了56.37%和33.49%,而花椒林地下降了2.09%;不同林地土壤有机碳含量均随土壤深度的增加而逐渐下降;4种林分乔木层的碳储量表现为楸树林>车桑子林>花椒林>柏木林;楸树、花椒和柏木林地0～20cm土层碳储量分别为113.061,82.424和126.841t·hm-2,与对照地相比,楸树和柏木林地土壤碳储量分别提高了31.14%和47.13%,而花椒林地却下降了4.39%,车桑子林地0～10cm土层碳储量为50.517t·hm-2;楸树林、花椒林、柏木林和车桑子林生态系统碳储量分别为117.207,84.117,127.919和53.733t·hm-2,且均表现为土壤层>植被层>死地被物层,4种林分以楸树林乔木层年固碳能力最高,达1.179t·hm-2a-1,其次为车桑子林,为0.686t·hm-2a-1,柏木林最低,为0.080t·hm-2a-1。
In this paper,the carbon storage and spatial distribution in young stands with four vegetation restoration patterns were investigated in Karsts area,Guizhou Province.The four vegetation restoration patterns included Sorbus pohuashanensis forests,Znthoxylum bungeanumi forests,Cupressus funebris forests,and Dodonaea viscose forests.The results showed that carbon concentrations varied with different tree organs in the same tree species and varied with different tree species in the same tree organ as well.Carbon concentrations were higher in aboveground organs than that in underground organ for all studied tree species except Sorbus pohuashanensis.Variation coefficients of carbon concentrations ranged from 0.88% to 7.02% for different organs of different tree species.Carbon contents ranged from 309.7 to 461.0,335.4 to 569.6,307.0 to 400.9 g·kg-1 in shrub,herb,and litterfall layers,respectively.Mean organic carbon contents ranged from 30.238 to 57.243 g·kg-1 in soils（0～10 cm depth）.At the early stage of vegetation restoration,soil organic carbon content increased 56.4% and 33.5% in Cupressus funebris forests and Sorbus pohuashanensis forests,but decreased 2.1% in Zanthoxylum bungeanum forests when compared with pre-converted farmland.Soil organic carbon content gradually decreased with increasing soil depth.Soil carbon storages（0～20cm depth） were 113.1,82.4 and 126.8 t·hm-2 in Sorbus pohuashanensis,Zanthoxylum bungeanum,and Cupressus funebris forests,respectively.Soil carbon storage was increased by 31.1% and 47.1% in Sorbus pohuashanensis and Cupressus funebris forests,but decreased 4.4% in Zanthoxylum bungeanum forests compared with pre-converted farmland.Carbon storage in soils（0～10 cm depth） was 50.5 t·hm-2 in Dodonaea viscose forests,The carbon storages were 117.2,84.1,127.9 and 53.7 t·hm-2 in Sorbus pohuashanensis,Zanthoxylum bungeanum,Cupressus funebris and Dodonaea viscose forest ecosystems,respectively.Carbon stocks in different components of the studied forest ecosystems were in an order as：soilvegetationlitterfall.Sorbus pohuashanensis forests had the highest capacity of carbon sequestration and was up to 1.2 t·hm-2a-1;Dodonaea viscose forest was the next（0.7 t·hm-2a-1） and Cupressus funebris forests was the lowest（0.08 t·hm-2a-1） in the four vegetation restoration patterns.
出处
《林业科学》
EI
CAS
CSCD
北大核心
2011年第9期7-14,共8页
Scientia Silvae Sinicae
基金
国家林业公益性行业科研专项(201104009
2007415
200904031
200804030)
国家野外科学观测研究站项目(2010-05)
国家林业局项目(201042)
教育部新世纪优秀人才支持计划(NCET-10-0151)
湖南省科技厅项目(2010TP4011-3)
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)
关键词
喀斯特地区
植被恢复
碳含量
碳储量
贵州省
Karsts area
vegetation restoration
carbon content
carbon storage
Guizhou Province
