摘要
为揭示天山典型天然草地土壤有机碳分布规律与影响因素,采用实地数据测量与地理信息技术相结合的研究方法,估算研究区不同深度土壤有机碳含量,分析空间分布特征。结果表明,根据不同模型估算,研究区7个土层有机碳密度均值分别为4.21、4.38、4.19、3.88、3.67、1.83、1.92 g/m^(2)。土壤深度为0~40 cm时,土壤有机碳(Soil Organic Carbon,SOC)含量整体较高,高值区域主要位于研究区的西南部,而在东北部和东南部,随着深度的增加,SOC密度呈现递减趋势。深度为40~100 cm时,研究区SOC含量整体下降,这与深度0~40 cm的SOC表现相同,研究区西南部有高值分布。研究区天然草地土壤有机碳含量呈现显著空间差异,土壤有机碳含量随土层深度的增加而降低,根据不同草地类型划分,具体表现为高寒草甸>亚高山草甸>山地草甸>温性草原>温性荒漠草原。研究结果为评估天山典型天然草地土壤固碳潜力提供科学基础。
In order to reveal the distribution pattern and influencing factors of soil organic carbon in typical natural grasslands in the Tianshan Mountains,the research method combining field data measurement and geographic information technology is adopted to estimate the soil organic carbon content at different depths in the study area and analyze the spatial distribution characteristics.The results show that according to different models,the average organic carbon density of the seven soil layers in the study area is 4.21,4.38,4.19,3.88,3.67,1.83,and 1.92 g/m^(2),respectively.When the soil depth is 0~40 cm,the overall Soil Organic Carbon(SOC)content is relatively high,and the high-value areas are mainly located in the southwest of the study area,in the northeast and southeast,as the depth increases,the SOC density shows a decreasing trend.When the depth is between 40~100 cm,the overall SOC content in the study area decreases,which is consistent with the SOC performance at depths of 0~40 cm,there is a high-value distribution in the southwest of the study area.The organic carbon content of natural grassland soil in the research area shows significant spatial differences,and the soil organic carbon content decreases with the increase of soil depth,according to different grassland types,it is divided into alpine meadow>subalpine meadow>mountain meadow>temperate grassland>temperate desert grassland.The research results provide a scientific basis for evaluating the carbon sequestration potential of typical natural grassland soils in the Tianshan Mountains.
作者
张茜
颜安
刘鹏
曲佐昊
刘飞
ZHANG Xi;YAN An;LIU Peng;QU Zuohao;LIU Fei(College of Resources and Environment,Xinjiang Agricultural University;College of Grassland Science,Xinjiang Agricultural University,Urumqi 830052,China)
出处
《中国资源综合利用》
2025年第12期218-222,共5页
China Resources Comprehensive Utilization
基金
天山天然林保护区碳库现状与碳汇潜力监测评估。
关键词
天然草地
土壤
有机碳
遥感估算
空间分布
natural grassland
soil
organic carbon
remote sensing estimation
spatial distribution
