摘要
云南松林是西藏高原亮针叶林生态系统的重要组成部分,准确估算其生态系统碳储量不但有助于弄清西藏森林生态系统固碳现状,而且可为准确估算青藏高原乃至全国森林生态系统的固碳潜力和固碳速率提供基础数据。本研究以云南松为研究对象,采用实地调查与建模相结合的方法,建立了各器官(叶、枝、干、根)与株高、胸径的生物量回归方程,并以此为基础计算了云南松幼龄林、中龄林、近熟林和成熟林生态系统的生物量和碳储量。结果表明:(1)用胸径和树高估测单株林木器官生物量的较优模型为指数模型,所建立的生物量回归方程相关性较好(R2>0.90),估计精度较高。(2)在云南松幼龄林、中龄林、近熟林和成熟林生态系统中植被总生物量分别为(63.80±9.21)、(134.76±12.69)、(142.91±13.02)、(316.72±42.57)t.hm-2,其中乔木层生物量分别为(49.48±10.32)、(120.57±9.37)、(124.70±12.92)、(304.76±32.47)t.hm-2,灌草层生物量为(13.09±3.02)、(12.81±2.54)、(11.88±3.12)、(3.47±0.98)t.hm-2,凋落物生物量为(1.23±0.24)、(1.38±0.31)、(0.72±0.11)、(1.13±0.39)t.hm-2。(3)各龄级云南松林生态系统植被碳储量分别为(30.67±7.13)、(67.63±19.06)、(71.00±4.15)、(159.32±39.95)t.hm-2,碳储量随林龄增加的变化规律明显,碳汇潜力巨大。
Pinus yunnanensis forest is an important component of coniferous forest ecosystems on Tibet Plateau. To accurately estimate the carbon storage of the P. yunnanensis forest ecosystem is of significance to understand the carbon sequestration of forest ecosystems in Tibet, and also, to provide basic data for estimating the carbon sequestration potential of forest ecosystems on Tibet Plateau and in China. In this paper, an investigation was conducted on the biomass and carbon storage of the P. yunnanensis forest of different ageclasses. Based on the data from twelve sampling plots and forty seven sample trees, the biomass regression equations of each organ （leaf, branch, stem, and root） of P. yunnanensis based on tree height and diameter at breast height were established. Then, the biomass and carbon storage of young, middle age, premature, and mature P. yunnanensis forests were calculated. The results showed that the exponential model was an appropriate regression model for estimating the biomass of each organ based on the tree height and the diameter at breast height of P. yunnanensis （R2〉0.90）. The total vegetation biomass of the young, middleage, premature, and mature P. yunnanensis ecosystems was （63.80±9.21）, （134.76±12.69）, （142.91±13.02）, and （316.72±42.57） t·hm^-2, of which, the biomass of tree layer was （49.48±10.32）, （120.57±9.37）, （124.70±12.92）, and （304.76±32.47） t·hm^-2, the biomass of shrub and herb layer was （13.09±3.02）, （12.81±2.54）, （11.88±3.12）, and （3.47±0.98） t·hm^-2, and the biomass of litter layer was （1.23±0.24）, （1.38±0.31）, （0.72±0.11）, and （1.13±0.39） t·hm^-2, respectively. The carbon storage of the young, middleage, premature, and mature P. yunnanensis forost ecosystems was （30.67±7.13）, （67.63±19.06）, （71.00±4.15）, and （159.32±39.95） t·hm^-2, respectively. The carbon storage ofthe P. yunnanensis forest increased significantly with its increasing stand age, indicating that Tibetan P. yunnanensis forest had great potential in carbon sequestration.
出处
《生态学杂志》
CAS
CSCD
北大核心
2013年第7期1674-1682,共9页
Chinese Journal of Ecology
基金
中国科学院战性略先导科技专项(XDA05050207)资助
关键词
西藏
云南松
生物量回归方程
生物量
碳储量
Tibet
Pinus yunnanensis
biomass regression model
biomass
carbon storage.
