土壤水分对土壤呼吸的影响

土壤呼吸是陆地生态系统碳循环的重要环节,在维持全球碳平衡中发挥着十分重要的作用.全球气候变暖会改变大气环流和全球水文循环,进而导致全球的降水格局发生变化,其最直接的影响就是改变土壤的水分状况,关于土壤水分状况对土壤呼吸的影响机理的研究对于预测未来土壤碳储量变化具有重要意义.本文总结了国内外关于土壤水分对土壤呼吸的影响方面的研究,系统分析了土壤水分是怎样影响土壤呼吸的各组成部分的,并简单介绍了土壤水分对Q10值的影响,最后针对当前相关研究存在的问题,对今后的研究方向加以展望.

Influences of So ilMo isture on So il Respira tion

Soil resp iration is an important component of the terrestrial ecosystems carbon cycle, and has great effectson maintaining the balance of global carbon. Global warming is expected to alter patterns of global atmospherecirculation and hydrologic cycling, and this will lead to the change of p recip itation regimes on global to regionalscales, which will have a direct effect on soilmoisture, so it is necessary to study how the change of soil moisturewould affect soil resp iration for p redicting change of soil carbon storage in the future. In this paper, the authorsreviewed the studies about the influences of soilmoisture change on soil resp iration, then analyzed how the change ofsoil moisture would affect each component of soil resp iration systemically, and introduced how the soil moisturewould affect Q₁₀ briefly, finally, it point out the study fields that should be emphasized in the future.