摘要
采用生物量模型与实际测量相结合的方法,从植被层(包括乔木与林下植被)、枯落层和土壤层(表层1 m)比较了井冈山5种重要森林生态系统碳密度.结果表明:①森林生态系统平均碳密度为29.047 kg/m2,常绿阔叶林>针阔混交林>人工杉木林>落叶阔叶林>毛竹林;②土壤碳密度平均值为22.453 kg/m2,占森林总碳密度的77.3%,5种森林类型土壤碳密度排序与总碳密度相同,且差异较小;③植被层碳密度差异最大,针阔混交林碳密度最大(12.039 kg/m2),是碳密度最小的落叶阔叶林(1.322 kg/m2)的9.1倍;④乔木层碳密度排序为针阔混交林>常绿阔叶林>人工杉木林>毛竹林>落叶阔叶林,乔木地上碳密度占乔木总碳密度的61.4%(人工杉木林)～75.8%(落叶阔叶林);⑤灌木层总碳密度差异大,常绿阔叶林和落叶阔叶林的灌木总碳密度分别为最大(0.153 kg/m2)和最小(0.027 kg/m2),前者是后者的5.6倍,灌木地上碳密度占灌木总碳密度的78.3%(针阔混交林)～81.0%(常绿阔叶林);⑥草本层总碳密度差异较小,在0.074 kg/m2(人工杉木林)～0.108 kg/m2(毛竹林)之间,地下碳密度略高于地上;⑦枯落层碳密度最低,不同森林类型间枯落层碳密度差异不大,在0.064～0.084 kg/m2之间.
Using a biomass model combined with actual measurements,we compared the carbon densities of five dominant forest ecosystems on Jinggang Mountain from vegetation including arbor and understory vegetation,litter and soil（1 m surface soil） layers.The results were as follows： ① The average total carbon density of the forest ecosystem was 29.047 kg /m2,with the order of density by forest type descending from evergreen broadleaved forest,mixed needles and broadleaf forest,Cunninghamia lanceolata plantation,deciduous broadleaved forest to bamboo forest.② The average soil organic carbon density of the five forest ecosystems was 22.453 kg /m2,contributing 77.3% to the average total carbon density of the forests.The order of soil organic carbon densities among the five forests was the same as that of the total carbon densities.There was little variation among soil organic carbon densities in the five forests.③ Large variations were found in the vegetation carbon densities among the five forests.The vegetation carbon densities had the largest value in the mixed needles and broadleaf forest（12.039 kg /m2）,which was 9.1 times greater than the smallest value,which was found in the deciduous broadleaved forest（1.322 kg /m2）.④ The arbor carbon densities of the forests descended from mixed needles and broadleaf forest,evergreen broadleaved forest,C.lanceolata plantation,bamboo forest to deciduous broadleaved forest.The above ground arbor carbon densities occupied 61.4%（C.lanceolata plantation） to 75.8%（deciduous broadleaved forest） of the total arbor carbon densities.⑤ Shrub carbon densities varied among the five forests and were highest（0.153 kg /m2） and smallest （0.027 kg/m2） in the evergreen broadleaved forest and thedeciduous broadleaved forest,respectively.The highest was5.6 times that of the smallest.Aboveground shrub carbondensities occupied 78.3%（mixed needles and broadleafforest） to 81.0%（evergreen broadleaved forest） of the totalshrub carbon densities.⑥ There was little variation among herb carbon densities in the five forests,ranging from 0.074 kg /m2（C.lanceolata plantation） to 0.108 kg /m2（bamboo forest）.Underground herb carbon densities were a little higher than those above ground.⑦ Litter carbon densities were smaller than thoseof other layers.There was little variation among herb carbon densities in the five forests,ranging from 0.064 to 0.084 kg /m2.
出处
《环境科学研究》
EI
CAS
CSCD
北大核心
2011年第4期401-408,共8页
Research of Environmental Sciences
基金
中央级公益性科研院所基本科研业务专项(2009KYYW12)
关键词
常绿阔叶林
人工杉木林
毛竹林
土壤有机碳
生物量模型
evergreen broadleaved forest
Cunninghamia lanceolata plantation
bamboo forest
soil organic carbon
biomass model
