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稳定性同位素技术在森林生态系统碳水通量组分区分中的应用

Keywords: 稳定性同位素技术,森林生态系统,碳水通量,组分区分

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Abstract:

生态系统碳水循环过程中的同位素分馏效应,为区分生态系统净碳交换过程中光合和呼吸通量,蒸散通量中植物蒸腾和土壤蒸发提供了理论依据.本文综述了稳定性同位素技术在这一领域的应用进展.研究结果显示,此方法切实可行,为进一步解释森林生态系统过程提供了广阔的前景.但由于森林生态系统结构复杂,不确定性因素多,国内外研究还处于尝试阶段.该方法在森林生态系统应用中还存在诸如Keeling图技术和涡度相关技术的假设条件难以满足等问题,期待今后在技术和理论上的突破.

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