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本文以广西桂林丫吉试验场的实际观测资料为基础，应用同位素示踪方法，探索了整个系统中碳的输入、输出和转移问题，并分析了表层岩溶生态系统中泉水水化学、土壤 ＣＯ２浓度及近地表植被层空气中ＣＯ２浓度的变化特征。结果显示，泉水水化学主要组分的日变化不明显，而土壤中ＣＯ２浓度则明显受日气候变化的影响，两者存在明显的滞后关系。用碳同位素示踪方法，重点对桂林观测站表层生态系统各碳库间碳的转移过程进行了定量研究，认为在有土壤层和植被覆盖的表层岩溶生态系统中，参与岩溶作用的碳有一半以上来源于与生物作用有关的碳。
Based on the actual observation data of Yaji test site in Guilin, Guangxi, this paper explores the input, output and transfer of carbon in the whole system by using isotope tracer method. The effects of water chemistry, soil CO2 concentration And the near-surface vegetation layer air CO2 concentration characteristics. The results showed that the diurnal variation of major components of spring water chemistry was not obvious, but the CO2 concentration in soil was significantly affected by the climatic change, and there was a significant lag between them. Carbon isotope tracing method was used to quantitatively study the carbon transfer process between carbon stocks in surface ecosystems of Guilin Observatory. It is concluded that in the epikarst ecosystems with soil layers and vegetation cover, half of the carbon involved in karstification The above comes from the biological role of carbon.