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为了探讨南亚热带森林生态系统碳循环的规律,在广泛收集资料和试验数据的基础上,对广州10种森林生态系统的碳循环进行研究.结果表明:10种森林生态系统的碳密度在108.35～151.85t C·hm-2,其中乔木层碳密度在10.85～48.86t C·hm-2,0～60cm土壤层在87.74～99.01t C·hm-2,均低于全国平均水平;从大气流向植被层的碳流量为4.41～9.15tC.hm-2·a-1,植被层流向土壤层的碳流量为0.74～2.06t C·hm-2·a-1,土壤层流向大气层的碳流量为3.94～5.42tC·hm-2·a-1,即系统从大气净吸收碳在0.47～4.97t C·hm-2·a-1之间.各种林分的净系统生产力不同,阔叶林大于针叶林,混交林大于纯林,天然次生林大于人工林.
In order to explore the law of carbon cycle in the subtropical forest ecosystem, the carbon cycle of 10 forest ecosystems in Guangzhou was studied on the basis of widely collecting data and experimental data.The results showed that the carbon density of 10 forest ecosystems was between 108.35 ~ 151.85t C · hm-2, in which the carbon density of arbor layer was between 10.85 ~ 48.86t C · hm-2 and the depth of 2,0 ~ 60cm soil layer was between 87.74 ~ 99.01t C · hm-2, both lower than the national average; The carbon flux in the vegetation layer was 4.41 ~ 9.15tC.hm-2 · a-1, and the carbon flux to the soil layer in the vegetation layer was 0.74 ~ 2.06t C · hm-2 · a-1. The carbon flux in the soil layer to the atmosphere was 3.94 ~ 5.42tC · hm-2 · a-1, that is, the net carbon absorbed by the system is between 0.47 ~ 4.97t C · hm-2 · a-1 The net system productivity of different stands is different, Larger than coniferous forest, mixed forest is larger than pure forest, natural secondary forest larger than plantation.