摘要
土壤碳储量研究在碳循环和全球变化中具有重要意义,但以往碳储量计算结果受到数据来源的制约。山东省多目标区域地球化学调查采用双层网格化采样和分析,获取了大密度、高精度土壤有机碳数据,为土壤碳库的准确计算奠定了基础。笔者利用这些数据计算了山东半岛蓝色经济区表层（0~20cm）、中上层（0~100cm）及全层（0~160cm）的土壤有机碳（SOC）密度和储量,并对其空间分布特征及固碳潜力进行了研究。结果显示,经济区内3种土壤层次的碳库组成不同,表层SOC储量占总碳（TC）储量的71.67%,随深度增加所占比例逐渐减小,而无机碳（SIC）储量所占比例逐渐增加,全层二者所占比率较为接近：表层SOC储量为132.64Mt,碳密度为2.06kg/m2;中上层为458.27Mt,碳密度为7.11kg/m2;全层为619.96Mt,碳密度为9.61kg/m2。各层SOC密度处于全国偏低水平,且在不同土壤类型、地貌类型、土地利用类型之间有一定差异：褐土土表层SOC密度最高（2.48kg/m2）,风沙土最低（0.91kg/m2）;灌溉水田表层SOC密度最高（3.45kg/m2）,菜地最低（1.61kg/m2）。表层SOC密度分布总体上呈现为沿海地区低、鲁北平原和胶莱盆地中等、山地丘陵和中低山区偏高的分布格局。从第二次土壤普查和本次多目标调查数据所建立的回归方程分析发现,在今后一定时期内,本区表层土壤总体表现为＂碳汇＂效应,未来可净增总有机碳（TOC）量60.94Mt,其中＂碳源＂量5.07Mt,＂碳汇＂量65.97Mt。
The study on soil carbon storage is of great significance in carbon cycle and global change research.However,past calculation accuracy of carbon storage was restricted by the data sources.Thanks to the double layer gridded sampling method and analysis,which was applied on the multi-targetregional geochemical survey in Shandong Province,we gathered a bulk of large density,high precision soil organic carbon（SOC）data,which was a good foundation for the accurate quantification of soil carbon pool.These data were used for the calculation of SOC density and storage in the surface（0-20cm）,middle-top（0-100cm）and full-thickness（0-160cm）layers of the soil in the Blue Economic Zone of Shandong Peninsula,and the spatial distributions of SOC storage and the potential for soil carbon sequestration were also studied.The results showed that,in the Blue Economic Zone,the soil carbon pool compositions of the above 3soil layers were different.The SOC storage in the surface soil accounted for 71.67% of total organic carbon（TC）storage,and decreased with the depth increases,whereas the proportion of SIC storage increased with the depth increases,both storage proportions of the full-thickness soil were close.Total SOC storage and average SOC density for the surface soil were132.64 Mt and 2.06kg/m2,respectively.For the middle-up soil,they were 458.27 Mt and 7.11kg/m2,and for the full-thickness soil,they were 619.96 Mt and 9.61kg/m2.The above SOC density numbers were all lower than the national average.In addition,SOC density was different with soil types,landforms and land uses.SOC density of the cinnamon soil surface was the largest（2.48kg/m2）,and that of the aeolian sandy soil was the smallest（0.91kg/m2）.SOC density of the irrigation paddy field soil surface was the largest（3.45kg/m2）,and that of the vegetable field was the smallest（1.61kg/m2）.The spatial distribution of the surface soil SOC density showed a pattern of low values in coastal areas,middle values in the North Shandong Plain and the Jia
出处
《吉林大学学报（地球科学版）》
EI
CAS
CSCD
北大核心
2014年第5期1659-1668,共10页
Journal of Jilin University：Earth Science Edition
基金
国土资源部公益性行业科研项目(1212010310306)
山东省国土资源大调查项目(2006709)
关键词
土壤有机碳
有机碳密度
有机碳储量
空间分布
固碳潜力
山东半岛蓝色经济区
soil organic carbon
organic carbon density
organic carbon storage
spatial distribution
potentials of carbon sequestration
Blue Economic Zone of Shandong Peninsula
