摘要
对山西暖性灌草丛、暖性草丛、温性草原和温性山地草甸4种主要类型草地土壤0~5cm、5~10cm、10~20cm、20~30cm、30~50cm、50~70cm和70~100cm不同垂直剖面有机碳密度及碳储量的分配特征进行研究,结果表明:山西4种主要草地土壤有机碳含量在107.98~145.62g/kg之间,平均为131.42g/kg。土壤有机碳密度平均为6.78kg/m^2,暖性草丛类最高,为7.25kg/m^2,其次为暖性灌草丛类和温性草原类,温性山地草甸类最小,为6.32kg/m^2。4种主要类型草地土壤有机碳表聚性明显,表层土壤有机碳占总有机碳的比例分别为52.85%、49.12%、46.79%和50.36%。随土层深度的增加,土壤有机碳含量逐渐降低,但不同类型草地减少的程度不同。草地土壤有机碳密度随土层深度的增加逐渐增大,暖性类草地0~100cm土层平均土壤碳密度均高于温性类草地。4种主要草地土壤总碳储量为257.39Tg。
The aim of this study was to learn more about carbon budget process and mechanism of natural grassland in Shanxi province and lay the foundation for reasonable utilization of grassland.We studied the distribution characteristics of soil organic carbon density and carbon storage in different vertical sections of 0~5cm,5~10cm,10~20cm,20~30cm,30~50cm,50~70cm and 70~100cm of four main grassland types in Shanxi,including warm-temperate shrub tussock,warm-temperate tussock,temperate steppe,and temperate mountain meadow.The results showed that the soil organic carbon content of the four main grassland ranged from 107.98 to 145.62g/kg,with an average of 131.42g/kg.The average density of soil organic carbon was 6.78kg/m^2,and warm-temperate tussock types were the highest(7.25kg/m^2),followed by the warm-temperate shrub tussock and temperate steppe types,and warm mountain meadow were the lowest(6.32kg/m^2).The soil organic carbon surface aggregation of four main types of grassland was obvious.the proportions of surface soil organic carbon in total organic carbon were 52.85%,49.12%,46.79% and 50.36%,respectively.With the increase of soil depth,soil organic carbon content gradually decreased,but the decrease degree of different types of grassland was different.The soil organic carbon density increased gradually with the increase of soil depth,and the average soil carbon density of 0~100 cm soil layer in warm-temperate types grassland was higher than that in temperate types grassland.The total soil carbon storage of the four main grasslands was 257.39Tg.
作者
张雄伟
李刚
董宽虎
赵祥
ZHANG Xiong-wei;LI Gang;DONG Kuan-hu;ZHAO Xiang(College of Animal Science and Veterinary Medicine,Shanxi Agricultural University,Shanxi Province,Jinzhong 030800,China)
出处
《中国草地学报》
CSCD
北大核心
2020年第1期141-146,共6页
Chinese Journal of Grassland
基金
国家自然科学基金(31870438,31572452)
山西省优秀人才科技创新项目(201805D211018)。
关键词
暖性灌草丛
暖性草丛
温性草原
温性山地草甸
土壤有机碳
土壤碳密度
碳分配
Warm-temperate shrub tussock
Warm-temperate tussock
Temperate steppe
Temperate mountain meadow
Soil organic carbon
Soil carbon density
Carbon distribution
