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六盘山典型森林碳储量与固碳速率研究
马正锐
Subtype硕士
2013-05
Degree Grantor中国科学院研究生院
Place of Conferral北京
Keyword生物量 碳储量 生长过程 固碳速率 六盘山
Abstract

森林生态系统是陆地生态系统的最大碳库,其地上部分碳库和土壤碳库分别占全
球地上部分碳库和土壤有机碳库的 80%和 70%,在调节全球碳平衡、减缓温室气体
浓度上升等方面具有不可替代的作用。准确系统量化区域森林生态系统碳储量及其分
配格局、固碳能力,对于减小在估算大尺度碳源、碳汇格局和模型模拟结果中的不确
定性有着重要的作用。
基于此,本研究以六盘山林区华北落叶松、油松人工林和华山松、辽东栎天然次
生林典型林地为对象,通过野外样地调查、采样及实验室分析相结合的方法,从空间
尺度对森林生态系统生物量和碳储量进行了研究,并对人工林的生长过程进行了分
析,在此基础上研究过去植被固碳能力的动态变化。同时对林下枯落物持水性能进行
了探讨,完善了枯落物水文功能研究体系。主要结论如下:
(1)华北落叶松、油松、华山松和辽东栎林植被与枯落物总碳储量分别是 29.87
t·hm -2 、58.06 t·hm -2 、48.5 t·hm -2 和 43.95 t·hm -2 。在空间分配上,呈现的特征为:乔
木层>枯落物层>灌木层>草本层。土壤有机碳含量均随着土层深度的增加而减小。油
松林土壤碳含量较少,为 109.25 t·hm -2 ,而其他三者差异不显著,均值为 184.50 t·hm -2 。
林地总碳储量分别是 216.85 t·hm -2 、167.31 t·hm -2 、223.58 t·hm -2 和 235.26 t·hm -2 ,特
征均为:土壤层>植被层>枯落层,其中土壤碳所占比例依次为 86%、65%、78%和
81%,在森林碳循环中起重要的作用。
(2)华北落叶松和油松林的平均木、劣势木和优势木的胸径连年生长量变化趋势
基本一致,分别在 12 a 和 10 a 后开始下降,此时林木对营养和空间需求增加,可适
当进行抚育间伐。29 a华北落叶松和30 a油松的平均木总材积分别是0.074 m 3 和0.070
m 3 ,二者均未进入成熟期,预计成熟年龄前者在 30 a 以后,而后者在 35 a 左右。华
北落叶松和油松材积生长过程用二次多项式拟合效果较好,R 2 均达到 0.98 以上。华
北落叶松林自第 12 a 起,固碳速率稳定为 2.70 t·hm -2 ·a -1 ;而油松林生长前期碳累积
缓慢,第 18-26 a,碳累积量迅速增加,平均为 4.32 t·hm -2 ·a -1 ,之后逐渐减小。(3)4 种林分的枯落物储量在 12.05~26.40 t·hm -2 ,厚度在 1.0~4.5 cm。本研究中
仅华北落叶松林下枯落物储量 y(g)与厚度 x(cm)具有较好的相关关系,拟合方
程分别为:y=36.64x+72.12,R 2 =0.65;而其他林分两者的相关性不明显。各林分枯落
物未分解层、半分解层持水率与时间变化关系,用对数方程进行拟合,效果较好(R 2
均大于 0.86)。4 种林分的枯落物有效拦蓄量分别是 4.31 mm、1.40 mm、4.13 mm 和
1.39 mm,以华北落叶松和华山松林持水能力较强。
关键词:生物量;碳储量;生长过程;固碳速率;六盘山

Other Abstract

As the largest terrestrial carbon pool, the aboveground and soil carbon stock of forest
ecosystem occupies respectively 80% and 70% of the global carbon stock. Forests play an
important role in regulating the global carbon balance and mitigating the rise in
atmospheric greenhouse gas concentration. There are many researches about carbon
storage of the forest ecosystem. Due to differences in the research scale and methods, there
are uncertainty and complexity in carbon storage of the forest ecosystem. To reduce the
uncertainty in estimation of carbon sequestration and the error of model simulation results,
it is necessary to accurately quantify the carbon stocks of regional forest ecosystem,
sequestration capacity and the distribution. Four typical forests in Liupan Mountain were
selected in this study: they are Larix principis-rupprechtii (plantation), Pinus
tabulaeformis (plantation), Pinus armandi (natural forest) and Quercus wutaishanica
(natural forest). We studied biomass and carbon storage in these forest systems by field
investigation and laboratory analysis. In addition, we explored the dynamic changes of
carbon sequestration ability of vegetation through analyzing the growth process of
plantations. In order to provide information of the hydro-ecological function of forest litter,
the litter water-holding characteristics are discussed in this paper. Main findings are as
following:
(1) Vegetation and litter carbon storage was 29.87 t·hm -2 (Larix principis-rupprechtii),
58.06 t·hm -2 (Pinus tabulaeformis), 48.5 t·hm -2 (Pinus armandi) and 43.95 t·hm -2
(Quercus wutaishanica), respectively. In spatial distribution, the vegetation carbon storage
followed the order tree layer > litter layer > shrub layer > herb layer. The soil organic
carbon concentration decreased with depth increasing. Pinus tabulaeformis had the lowest
soil carbon storage (109.25 t·hm -2 ), and the mean value of other three forests was 184.50
t·hm -2 . The carbon storage of forest ecosystem was 216.85 t·hm -2 , 167.31 t·hm -2 , 223.58  t·hm -2 and 235.26 t·hm -2 in the four tested forests. The distributions of carbon stock were
followed as: soil layer > vegetation layer > litter layer, indicating that soil carbon pool is
the key part of forest ecosystem and plays a vital role in the forest carbon cycle.
(2) The annual DBH increments of the dominant, average and suppressed trees
showed a consistent trend within the two tree species of Larix principis-rupprechtii and
Pinus tabulaeformis. Their growth began to decline at 12 th and 10 th years when
intermediate thinning would be taken. With the average volume of 0.074 m 3  and 0.070
m 3 , 29a Larix principis-rupprechtii and 30a Pinus tabulaeformis have not yet reached the
maturation stage. We predict the mature age of Larix principis-rupprechtii is 30a and
Pinus tabulaeformis is 35a. The volume growth of the two plantations can be simulated by
quadratic polynomial equations with R 2 > 0.98. From the 12 th year, the carbon
sequestration rate of Larix principis-rupprechtii tended to be a stable level of 2.70
t·hm -2 ·a -1 . The Pinus tabulaeformis, however, grew slowly in the early stage, and the
accumulation of carbon increased rapidly during 18 th -26 th year (4.32 t·hm -2 ·a -1 ), then
decreased with times increasing.
(3) The amount of litters in the four forests was 12.05~26.40 t·hm -2 with thickness of
1.0~4.5 cm. Litter stock (g) and thickness (cm) of Larix principis-rupprechtii forests had a
linear correlation (y = 36.64 + 72.12x,R 2 =0.65). There was no significant correlation in
other three stands. Water immersion method had been applied to determine the variation of
water-hold rate (%) with times (h) among different vegetation types. The regression
equation between water-hold rate and time were y = alnx + b. The modified interception
was 4.31 mm, 1.40 mm, 4.13 mm and 1.39 mm respectively, indicating that Larix
principis-rupprechtii and Pinus armandi had relatively higher water-holding ability.
Keywords: biomass; carbon storage; growth process; carbon sequestration rate; Liupan
Mountain 

Language中文
Document Type学位论文
Identifierhttp://ir.iswc.ac.cn/handle/361005/8949
Collection水保所知识产出(1956---)
Recommended Citation
GB/T 7714
马正锐. 六盘山典型森林碳储量与固碳速率研究[D]. 北京. 中国科学院研究生院,2013.
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