[目的]通过对南疆地区不同土壤类型土壤碳含量变化特征及其气候因素的分析，为新疆双碳目标的研究以及生态环境保护提供数据支持。[方法]本文以南疆为研究区，以新疆第二次土壤普查和2015年南疆土系调查数据为基础，运用方差分析、相关性分析等方法，对比分析两个时期不同土壤类型0～100cm 土层深度碳含量变化特征，并探究气候因子对其的影响。[结果]耕作土壤不同土壤类型有机碳含量为1。13～11。42 g kg-1、无机碳含量为8。84～25。81 g kg-1;非耕作土壤不同土壤类型有机碳含量为1。18～18。10 gkg-1、无机碳含量为5。16～24。52 gkg-1。两个时期南疆地区有机碳的平均含量与气温呈极显著负相关关系，与降水量呈极显著正相关关系;而无机碳呈现出相反规律。[结论]人为因素对南疆不同土壤类型碳含量变化具有不可忽视的作用。气温和降水是影响研究区土壤有机碳含量分布的主要因素，而无机碳含量变化可能受到多种因素的影响。研究结果对于制定该地区的土地恢复计划及提高土壤碳储量具有重要意义。
Change Characteristics of Carbon Contents in Different Soil Types and Analysis of Climatic Factors in Southern Xinjiang
[Objective]The aims were to provide data support for the study of dual-carbon targets and ecological environmental protection in Xinjiang,as well as data support and scientific basis for the rational utilization and management of soils in the Southern Xinjiang region.[Method]Based on the data of the second soil survey in Xinjiang in 1980 and the soil profile data in 2015,the variation characteristics of organic carbon(C)and inorganic C content in 0～100 cm soil layer of different soil types were compared and analyzed.The effects of climatic factors on them were discussed by means of variance analysis and correlation analysis.[Result]The organic C contents of different soil types in the cultivated soil ranged from 1.13 g kg-1 to 11.42 g kg-1 with a change rate of 20.84％,and the inorganic C contents ranged from 8.84 g kg-1 to 25.81 g kg-1 with a change rate of-10.91％.The organic C contents of different soil types of non-tillage soils ranged from 1.18 g kg-1 to 18.10 g kg-1,with a change rate of 104.76％,and the inorganic C content ranged from 5.16 g kg-1 to 24.52 g kg-1,with a change rate of-3.35％.The average content of organicC in the South Xinjiang region during the two periods showed a highly significant negative correlation with temperature and a highly significant positive correlation with precipitation.The average content of inorganic C was opposite to that of organic C,which showed a positive correlation with temperature and a negative correlation with precipitation.[Conclusion]These results showed that human factors had significant effects on soil C content.In the two periods,the organic C contents of most soil types were decreased with the increase of soil depth in the 0～100 cm soil layer,and the inorganic C content showed a trend of decreasing first and then increasing.In southern Xinjiang,temperature and precipitation were the main factors affecting the distribution of soil organic C content in the study area.The change of inorganic C content was more complex,and its change might also be affected by many other factors,which put forward more challenging and complex problems for future land management and C sink research.
NETL
NSTL
万方数据
