立地类型对长白山天然白桦林生态系统碳储量的影响  

Effect of Site Types on Carbon Storage of Natural White Birch Forest Ecosystem in Changbai Mountains,Northeast China

作　　者：李娜娜[1] 牟长城[1] 郑瞳[1] 张毅[1] 程家友 曹万亮[3] 

机构地区：[1]东北林业大学生态研究中心,黑龙江哈尔滨150040 [2]吉林省白河林业局,吉林延吉133613 [3]吉林省敦化林业局,吉林延吉133700

出　　处：《林业科学研究》2015年第5期618-626,共9页Forest Research

基　　金：国家"十二五"科技支撑项目(2012BAD21B02)

摘　　要：利用相对生长方程与碳/氮分析法,对比分析长白山天然白桦林在7个立地类型(阳坡上、中、下部与阴坡上、中、下部及谷地)上的生态系统碳储量(植被与土壤)、净初级生产力与年净固碳量,揭示立地类型对温带白桦林生态系统碳库与固碳能力的影响规律。结果表明:1长白山天然白桦林植被碳储量(45.61 87.22 t·hm-2)呈阴坡上、中部与谷地>阳坡上、中部与阴坡下部>阳坡下部变化趋势,且高立地型显著高于低立地型50.8%91.2%(P<0.05),中立地型高于低立地型20.4%44.4%(P>0.05);2土壤碳储量(66.71 158.51 t·hm-2)呈阳坡上部、阴坡中部与谷地>阳坡中、下部与阴坡下部>阴坡上部变化趋势,且高立地型显著高于低立地型99.3%137.6%(P<0.05),中立地型高于低立地型40.7%67.0%(P>0.05);3生态系统碳储量(139.44 231.12 t·hm-2),呈阴坡中部与谷地>阳坡上部与阴坡下部>阳坡中、下部与阴坡上部变化趋势,且高立地型显著高于低立地型35.6%65.7%(P<0.05),中立地型高于低立地型5.8%34.7%(P>0.05);4植被净初级生产力(4.92 11.25 t·hm-2·a-1)和年净固碳量(2.32 5.32 t·hm-2·a-1)均呈阴坡上、中部>阳坡上、下部与阴坡下部及谷地>阳坡中部变化趋势,且高立地型显著高于中、低立地型42.5%128.7%和45.2%129.3%(P<0.05),中立地型高于低立地型10.6%56.3%和14.2%53.4%,但仅阴坡下部提高显著。因此,长白山白桦林生态系统碳库与固碳能力均受到立地类型的强烈影响,故对其碳汇功能评价应考虑其立地分异规律性。The effect of site types on the ecosystem carbon storage （ vegetation and soil）, net primary productivity （NPP） and annual net carbon sequestration （ANCS） of natural white birch （Betula platyphylla Suk. ） forests were measured on seven site types （the top, middle, and bottom of the sunny slope and shady slope, and the valley floor） using relative growth equations and carbon/nitrogen analytical approach in Changbai Mountains, Northeast China. The results are as follows. （ 1 ） The vegetation carbon storage （45.61 ~ 87.22 t·hm^-2 ） of natural white birch forests took on the upper and middle of shady slope and the valley 〉 the upper and middle of sunny slope, and the lower of shady slope 〉 the lower of sunny slope, which the high site types were significantly higher137.6%, P 〈 0.05 ） than the low site type, and the medium site types were 40.7% ~ 67.0% higher than the low site type （P 〉 0.05）. （3） The ecosystem carbon storage （139.44 ~ 231.12 t·hm^-2） took on the middle of shady slope and the valley 〉 the upper of sunny slope and the lower of shady slope 〉 the lower and the middle of sunny slope, and the upper of shady slope, which the high site types were significantly higher （35.6% ~ 65.7% , P 〈 0. 05 ） than the low site type, and the medium site types were 5.8% ~ 34.7% higher （P 〉 0.05） than the low site type. （4） The NPP and ANCS of the white birch forests（4.92 ~ 11.25 t · hm^-2 · a^-1 and 2.32 ~5.32 t · hm^-2 · a^-1 ） all took on the upper and middle of shady slope 〉 the upper and lower of sunny slope, the lower of shady slope, and the valley 〉 the middle of sunny, which the high site types were significantly higher （42.5% - 128.7% or 45.2%- 129.3%, P 〈0.05） than the low and medium site type, and the medium site types were 10.6% - 56.3% or 14.2% - 53.4% higher than the low site type, but only the lower of shady slope had signifi- cant difference with it. Therefore, the ecosystem carbon storage forests were strongly influence

关 键 词：长白山 白桦林 生态系统碳储量 净初级生产力 年固碳量 立地类型 

分 类 号：S714[农业科学—林学]