太行山区不同土地利用方式下土壤碳贮量的研究

Soil Carbon Storage Patterns of Different Land Use Systems in Taihang Mountain

通过实测对比分析了太行山区不同土地利用方式下土壤有机碳贮量的变化。研究结果表明:(1)不同土地利用方式下,土壤有机碳含量有明显差异,总的趋势是经济林(板栗林)>水土保持林>农田;(2)各种土地利用方式下,土壤有机碳和有机碳密度均随土壤深度增加呈现递减的趋势,但土地利用方式不同,其减少程度不同,农田土壤有机碳含量在土层深度上变化较小;(3)研究区域土壤总碳贮量为41573.67 t,土壤碳贮量以经济林(板栗林)最大,达到了46.02%,水土保持林次之,而农田贡献最小,仅占5.43%。分析表明:土地利用方式对陆地生态系统碳贮量有明显影响,通过调整土地利用方式可以增加土地生态系统的碳贮量;经济林虽然人为干扰较为强烈,但由于人为投入较大,土壤碳贮量仍能保持较高的水平。

The changes of soil organic carbon storage in different land use systems are analyzed here. The results are as follows. （1） Among the different land use systems, the different is clear in the amount of soil organic carbon, and the general trend is, economic forest （ Castanea mollissima Blume）〉 soil and water conservation forests farmland. （2） Among the various land use systems, the content of soil organic carbon（SOC） and soil carbon density decreased with the increase of soil depth, but the extent of decreasing is different due to different land use systems. The change of the amount of soil organic carbon in farmland soil depth is not obvious. （3） The total carbon storage is 41 573.67 t in the study area, and the contribution rate of economic forest of Castanea mollissima Blume is 46.02 %, highest among all land use systems; and the contribution rate of farmland is only 5.43%. It the soil and water conservation forests soil is secondary, is concluded that the land use systems have distinct impacts on terrestrial ecosystem carbon storage ; the carbon storage of soil ecosystem can be increased through adjusting the land use systems; although the economic forests is always under intense disturbances by people, the soil carbon storage can keep high level because of the large investing from humankind.