北京市松山天然油松林生态系统的碳储量

目的]分析北京市松山地区天然油松林生态系统碳储量,为研究区天然油松林的碳固定和碳储量管理研究提供理论依据。方法]以北京市松山天然油松林生态系统为研对象,设置标准样地进行乔木。灌木。草本。凋落物调查,采集并分析0—100cm土层土样,根据相关方程计算出生态系统以及各个层次的碳储量。结果]植物体含碳率变化在42.39%~49.95%,0—100cm土壤含碳率变化在0.26%~1.31%。天然油松生态系统碳储量为147.24 Mg/hm2,其中植被碳储量为57.14 Mg/hm2,占生态系统碳储量的36.7%,植被各层碳储量的顺序为乔木(54.93Mg/hm2)灌木(0.45Mg/hm2)草本(0.29Mg/hm2);土壤碳储量为66.35 Mg/hm2,占生态系统碳储量的46.30%,分别是植被碳储量的1.16倍和凋落物碳储量的2.79倍,且随着土层深度的增加而递减;凋落物碳储量为23.75 Mg/hm2,占生态系统碳储量17%。结论]松山地区天然乔木对植被碳储量的贡献率最大,松山地区天然油松林植被含碳率表现为:乔木灌木草本凋落物。

Carbon Storage of Natural Pinus Tabulaeformis Forest in Songshan Mountain in Beijing City

Objective] To study the carbon storage of natural Pinus tabulaeformis in order to provide theoretical basis for the management of carbon fixation and storage management in natural P. tabulaeformis forest in Songshan Mountain in Beijing City.Methods] We set up standard plots in natural P. tabulaeformis forest, and sampled biomass of trees, shrubs, grasses and litter, and then collected soil samples at a depth of 0 to 100 cm. The correlative models were used to estimate the carbon storage of natural P. tabulaeformis forest ecosystem and different components.Results] The vegetation carbon content changed from 42.39% to 49.95%, and it changed from 0.26% to 1.31% in the soil layer from 0 to 100 cm. The average carbon storage of P. tabulaeformis ecosystem was 147.24 Mg/hm², and the average carbon storage in vegetation was 57.14 Mg/hm², accounted for 36.7% of ecosystem carbon, carbon storage in each layer of the forest were trees(54.93 Mg/hm²) > shrub(0.45 Mg/hm²⁾ > herb(0.29 Mg/hm²). The average soil carbon storage was 66.35 Mg/hm², accounting for 46.30% of ecosystem carbon and 1.16 times the vegetation and 2.79 times litter carbon storage. The soil carbon content decreases with the increase of soil depth. Litter average carbon storage was 23.75 Mg/hm², accounting for 17% of ecosystem carbon storage.Conclusion] Natural forest in Songshan mountain area contributed most to vegetation carbon storage, and carbon content of natural P. tabulaeformis forest in Songshan mountain area vegetation follows an order of arbor > shrub > herb > litter.