CAJ | 학술논문

本文利用三次全国土壤侵蚀遥感普查数据和第二次土壤普查土壤有机碳和无机碳密度数据,分析了我国土壤水蚀碳量的空间分布及其时间动态.研究结果表明:我国土壤水蚀碳量为74.61 Tg C y.1,其中有机碳量51.49 Tg C y-1,无机碳量23.12 TgC y-1.在七大水土流失区中,水蚀有机碳量最多的是西南岩溶区,占总水蚀有机碳量的26.48％;水蚀无机碳量最多的是黄土高原区,占总水蚀无机碳量的67.62％.前者以中度水蚀为主,后者以极强度和强度水蚀为主.80年代中期至90年代中期,我国土壤水蚀碳量共减少了11.66 Tg C y-1,以有机碳迁移量减少为主,占总减少量的81.93％; 90年代中期至21世纪初,土壤水蚀碳量依然呈下降趋势,共减少了1.65 Tg C y-1,其中,有机碳迁移量减少了1.514 Tg C y-1,无机碳迁移量减少了0.134 Tg C y-1.
본문이용삼차전국토양침식요감보사수거화제이차토양보사토양유궤탄화무궤탄밀도수거,분석료아국토양수식탄량적공간분포급기시간동태.연구결과표명:아국토양수식탄량위74.61 Tg C y.1,기중유궤탄량51.49 Tg C y-1,무궤탄량23.12 TgC y-1.재칠대수토류실구중,수식유궤탄량최다적시서남암용구,점총수식유궤탄량적26.48％;수식무궤탄량최다적시황토고원구,점총수식무궤탄량적67.62％.전자이중도수식위주,후자이겁강도화강도수식위주.80년대중기지90년대중기,아국토양수식탄량공감소료11.66 Tg C y-1,이유궤탄천이량감소위주,점총감소량적81.93％; 90년대중기지21세기초,토양수식탄량의연정하강추세,공감소료1.65 Tg C y-1,기중,유궤탄천이량감소료1.514 Tg C y-1,무궤탄천이량감소료0.134 Tg C y-1.
Using water erosion data from three national soil erosion remote-sensing surveys (the first:1985-1986; the second: 1995-1996; the third: 2000-2001) and carbon density data from the second national soil survey (1979-1992),we computed soil carbon removal caused by water erosion,and analyzed its spatial distribution and temporal dynamics in China.Results revealed that the total removal of soil carbon caused by water erosion was about 74.61 Tg C y-1,of which 51.49 Tg C y-1 was organic carbon,and 23.12 Tg C y-1 was inorganic carbon.The main erosion level of the whole is moderate erosion.Among the seven erosion regions,the Southwest Karst Region had the most significant removal of soil organic carbon,which was 26.48％ of the total and mainly due to its moderate erosion.In contrast,about 67.62％ of the soil inorganic carbon removal occurred in the Loess Plateau Region,which mainly due to its highly intense and intense erosion.As a whole,the removals of soil carbon caused by water erosion represented a decreasing trend among the three national soil erosion remote-sensing surveys.Between the first and the second survey,soil carbon removal decreased by 11.66 Tg C y-1,of which 81.93％ was organic carbon.Compared with that in the second survey,soil carbon removal decreased by 1.65 Tg C y-1 in the third survey,of which 1.514 Tg C y-1 was organic carbon,and 0.134 Tg C y-1 was inorganic carbon.