CAJ | 학술논문

作为陆地碳库的主要部分,土壤有机碳在全球碳循环中起着重要作用.本文选取环青海湖高寒湿地土壤为研究对象,对土壤有机碳含量的变化特征及其空间变异性进行了研究.结果显示,环青海湖区土壤有机碳0-10cm表层含量最高,均值为2.82±1.56%,随着土层深度的加深其含量逐渐降低.10-20cm、20-30cm和30-40cm土层的有机碳平均含量依次为2.01±1.03%、1.63±0.87%和1.21±0.91%;整个研究区0-40cm土壤有机碳平均含量仅为1.92±1.27%.半方差函数和变异函数分析结果说明,0-10cm,10-20cm和20-30cm土层土壤有机碳含量的模型均符合球状模型,30-40cm土层土壤有机碳含量和0-40cm土壤有机碳平均含量的模型为指数模型.而且在各向同性和各向异性下不同深度土壤有机碳均具有高度的空间异质性.
작위륙지탄고적주요부분,토양유궤탄재전구탄순배중기착중요작용.본문선취배청해호고한습지토양위연구대상,대토양유궤탄함량적변화특정급기공간변이성진행료연구.결과현시,배청해호구토양유궤탄0-10cm표층함량최고,균치위2.82±1.56%,수착토층심도적가심기함량축점강저.10-20cm、20-30cm화30-40cm토층적유궤탄평균함량의차위2.01±1.03%、1.63±0.87%화1.21±0.91%;정개연구구0-40cm토양유궤탄평균함량부위1.92±1.27%.반방차함수화변이함수분석결과설명,0-10cm,10-20cm화20-30cm토층토양유궤탄함량적모형균부합구상모형,30-40cm토층토양유궤탄함량화0-40cm토양유궤탄평균함량적모형위지수모형.이차재각향동성화각향이성하불동심도토양유궤탄균구유고도적공간이질성.
As a major part of terrestrial carbon pools, soil organic carbon plays an important role in the global carbon cycle. Selected alpine wetland soil in Qinghai Lake for study object, this paper studied characteristics of soil organic earbon（SOC）content and its spatial variability. Results showed that soil organic carbon content in the 0-10 cm soil layer was the highest,with mean of 2. 82±1.56%. With the depth of the soil deepening, its content was decreased gradually, the average content of soil organic carbon in the 10-20 cm,20-30 cm and 30-40 cm soil layer was 2.01±1.03%, 1.63＋0.87% and 1.21±0.91%, respectively; the average content of soil organic carbon in the 0-40 cm layers throughout the study area was only 1.92 ± 1.27-. Semi-variance function and the variogram analysis results showed that the models of soil organic carbon content in the 0-10 cm, 10-20 cm and 20-30 em soil layers obeyed the spherical model, The models of SOC in 30-40 cm layer and the average of 0-40 cm layer obeyed the exponential models. And also the analyses of the soil organic carbon isotropic and anisotropicunder different depths indicated that SOC existed in higher spatial heterogeneity.