CAJ | 학술논문

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（0～20 cm）、中上层（0～100 cm）及全层（0～160 cm）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132．64 Mt，碳密度为2．06 kg/m2；中上层为458．27 Mt，碳密度为7．11 kg/m2；全层为619．96 Mt，碳密度为9．61 kg/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（2．48 kg/m2），风沙土最低（0．91 kg/m2）；灌溉水田表层 SOC 密度最高（3．45 kg/m2），菜地最低（1．61 kg/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60．94 Mt，其中“碳源”量5．07 Mt，“碳汇”量65．97 Mt。
토양탄저량연구재탄순배화전구변화중구유중요의의，단이왕탄저량계산결과수도수거래원적제약。산동성다목표구역지구화학조사채용쌍층망격화채양화분석，획취료대밀도、고정도토양유궤탄수거，위토양탄고적준학계산전정료기출。필자이용저사수거계산료산동반도람색경제구표층（0～20 cm）、중상층（0～100 cm）급전층（0～160 cm）적토양유궤탄（SOC）밀도화저량，병대기공간분포특정급고탄잠력진행료연구。결과현시，경제구내3충토양층차적탄고조성불동，표층 SOC 저량점총탄（TC）저량적71．67％，수심도증가소점비례축점감소，이무궤탄（SIC）저량소점비례축점증가，전층이자소점비솔교위접근：표층 SOC 저량위132．64 Mt，탄밀도위2．06 kg/m2；중상층위458．27 Mt，탄밀도위7．11 kg/m2；전층위619．96 Mt，탄밀도위9．61 kg/m2。각층 SOC 밀도처우전국편저수평，차재불동토양류형、지모류형、토지이용류형지간유일정차이：갈토토표층 SOC 밀도최고（2．48 kg/m2），풍사토최저（0．91 kg/m2）；관개수전표층 SOC 밀도최고（3．45 kg/m2），채지최저（1．61 kg/m2）。표층 SOC 밀도분포총체상정현위연해지구저、로북평원화효래분지중등、산지구릉화중저산구편고적분포격국。종제이차토양보사화본차다목표조사수거소건립적회귀방정분석발현，재금후일정시기내，본구표층토양총체표현위“탄회”효응，미래가정증총유궤탄（TOC）량60．94 Mt，기중“탄원”량5．07 Mt，“탄회”량65．97 Mt。
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-target regional 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 20 cm),middle-top (0 100 cm)and full-thickness (0 160 cm)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 3 soil 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 were 132.64 Mt and 2.06 kg/m2 ,respectively.For the middle-up soil,they were 458.27 Mt and 7.11 kg/m2 ,and for the full-thickness soil,they were 619.96 Mt and 9.61 kg/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 (2.48 kg/m2 ),and that of the aeolian sandy soil was the smallest (0.91 kg/m2 ).SOC density of the irrigation paddy field soil surface was the largest (3.45 kg/m2 ),and that of the vegetable field was the smallest (1.61 kg/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 Jiaolai basin,and high values in the hills and low mountains.According to the regression equations established using the second soil survey data and the multi-target regional geochemical survey data,and it shows that the surface soil in the Blue Economic Zone of Shandong Peninsula will act as a carbon sink in the future period.There will be a net increase of 60.94 Mt more TOC,of which,a decrease of 5.07 Mt will originate from carbon emissions and an increase of 65.97 Mt will originates from carbon sequestrations.