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基于野外调查和实验室仪器分析数据,研究了秦岭天然油松林生物量、碳密度、碳储量的空间分布及其随龄级、海拔变化的规律.结果表明:碳在油松各器官中的分配以树干所占比例最大,其次为树枝,树皮最小;不同器官生物量碳密度在0.491 6~0.529 8之间波动,由大到小顺序为:皮,叶,枝,干,根;油松林生态系统的生物量碳密度为183.26 t/hm2,其中土壤层(0~60 cm)约占2/3,植被层约占1/3;油松林生态系统的生物量碳密度在海拔1 700~1 800 m最大,达196.53 t/hm2,海拔低于1 500 m和超过1 900 m,都较小,分别为173.80 t/hm2和169.31 t/hm2;5个龄级的天然油松林的生物量碳密度以平均树龄20 a为最小,50 a为最大.
Based on the data of field investigation and laboratory analysis, the spatial distribution of biomass, carbon density and carbon storage of Pinus tabulaeformis forest in Qinling Mountains and its variation with age and altitude were studied.The results showed that the distribution of carbon in all organs of Pinus tabulaeformis With the largest proportion of trunk, followed by branches, the smallest bark; biomass carbon density of different organs fluctuated between 0.491 6 ~ 0.529 8, descending order: skin, leaves, branches, stems, roots; Pinus tabulaeformis The biomass carbon density of the ecosystem was 183.26 t / hm2, of which the soil layer (0-60 cm) accounted for about 2/3 and the vegetation layer accounted for about 1/3. The biomass carbon density of Pinus tabulaeformis ecosystems was between 1700 ~ 1 800 m, reaching 196.53 t / hm2, with elevations of less than 1 500 m and more than 1 900 m, all of which were 173.80 t / hm2 and 169.31 t / hm2, respectively. The average carbon density of 20 a for the minimum, 50 a for the largest.