摘要
采用CID-301PS光合测定仪,对湖南会同林区毛竹和杉木人工林土壤CO2排放动态进行观测,并结合现存生物量调查,对其生态系统碳平衡特征进行估算。结果表明:毛竹和杉木林生态系统碳贮量分别为144.3和152.52t.hm-2,并且其碳贮量空间分布格局基本一致,土壤层是主要部分,其次为乔木层,凋落物层和林下植被层所占比例最小。毛竹林土壤层有机碳贮量占76.89%,乔木层占22.16%,凋落物和林下植被层分别占0.51%和0.41%;杉木林土壤层碳贮量占62.03%,乔木层占34.99%,凋落物和林下植被层分别占2.28%和0.70%。毛竹林和杉木林生态系统年固定CO2总量分别为38.87和26.95t.hm-2a-1,但其每年以土壤异养呼吸和凋落物呼吸的形式排放CO2的量分别为24.35和15.75t.hm-2a-1,毛竹林和杉木林生态系统年净固定CO2的量分别为14.52和11.21t.hm-2a-1,折合成净碳量分别为3.96和3.07t.hm-2a-1。
Based on the data from measurements of soil respiration and a survey of biomass,the carbon balance between assimilation and release was estimated in Moso Bamboo（Phyllostachys edulis）and Chinese Fir（Cunninghamia lanceolata）plantation.The results showed that：the carbon pool of the Moso Bamboo and Chinese Fir plantation was 144.3 and 152.52 t.hm-2,respectively.The spatial distribution pattern of carbon stocks was basically consistent in the two forest ecosystems,in an order of soil layer trees layer shrub and herb and litter layer.In Moso Bamboo plantation,layer took soil（76.89%） trees（22.16%） standing litters（0.51%） shrub and herb（0.41%）while in Chinese Fir plantation,soil（62.03%） trees（34.99%） standing litters（2.28%） shrub and herb（0.70%）.In general,the total assimilated CO2 by gross primary production of Moso Bamboo and Chinese Fir plantation community was 38.87 and 26.95 t.hm-2 a-1,respectively,while the total release of CO2 from the systems was up to 24.35 and 15.75 t.hm-2a-1 respectively.Therefore,the carbon budget for Moso Bamboo and Chinese Fir plantation ecosystem had net acquisition which was estimated to be 14.52 and 11.21 tCO2.hm-2a-1 or 3.96 and 3.07 tC.hm-2a-1,respectively.
出处
《林业科学》
EI
CAS
CSCD
北大核心
2010年第11期59-65,共7页
Scientia Silvae Sinicae
基金
国家"十一五"科技支撑计划(2006BAD19B0104)
江西省青年科学家(井冈之星)培养对象计划(2007221101)资助
关键词
毛竹林
杉木人工林
碳贮量
土壤呼吸
碳平衡
Moso Bamboo plantation
Chinese Fir plantation
carbon storage
soil respiration
carbon balance
