CAJ | 학술논문

选择正确的方法准确计算北方干旱半干旱岩溶区的岩溶碳汇量，有助于提高我国岩溶碳汇效应估算精度和改进全球碳循环模型。利用水化学径流法和标准溶蚀试片法对山西马跑神泉域的岩溶碳汇量进行了计算，结果表明，标准溶蚀试片法计算出的流域碳汇量和碳汇强度为386.15 t/a 和1.821 t/(km2·a)，水化学径流法的结果为2084.08 t/a 和9.83 t/(km2·a)，试片法计算结果仅为水化学径流法的1/5。试片溶蚀速率和土壤无机碳质量分数呈负相关关系，进一步表明土壤无机碳质量分数高(是有机碳质量分数的2.85~5.06倍)是造成试片法计算结果偏小的主要原因：高含量的无机碳在半干旱气候条件下容易沉积，从而使试片溶蚀速率偏小；流域边界清楚，水化学和流量易于监测，利用水化学径流法计算岩溶碳汇强度结果更为准确。因此，在半干旱地区，计算岩溶碳汇效应宜采用水化学径流法。
선택정학적방법준학계산북방간한반간한암용구적암용탄회량，유조우제고아국암용탄회효응고산정도화개진전구탄순배모형。이용수화학경류법화표준용식시편법대산서마포신천역적암용탄회량진행료계산，결과표명，표준용식시편법계산출적류역탄회량화탄회강도위386.15 t/a 화1.821 t/(km2·a)，수화학경류법적결과위2084.08 t/a 화9.83 t/(km2·a)，시편법계산결과부위수화학경류법적1/5。시편용식속솔화토양무궤탄질량분수정부상관관계，진일보표명토양무궤탄질량분수고(시유궤탄질량분수적2.85~5.06배)시조성시편법계산결과편소적주요원인：고함량적무궤탄재반간한기후조건하용역침적，종이사시편용식속솔편소；류역변계청초，수화학화류량역우감측，이용수화학경류법계산암용탄회강도결과경위준학。인차，재반간한지구，계산암용탄회효응의채용수화학경류법。
By choosing the appropriate method for accurately calculating the amount of karst carbon sink in arid and semiarid regions in Northern China,the estimation accuracy of China’s karst carbon sink and global carbon cycle models can be improved.The results show that karst carbon sink intensity (1.821 t/(km2 ·a))with the standard dissolution method is only 1/5 of that of the hydrochemistry-runoff method(9.83 t/(km2 · a))in the Mapao Spring Catchment,Shanxi Province by using the hydrochemical runoff method and standard dissolution method.The negative correlation between tablets dissolution rate and soil inorganic carbon further indicates that the high levels of soil inorganic carbon (2.85 5.06 times of organic carbon content)is the major cause for the smaller results by standard dissolution method.In semi-arid regions,the high inorganic carbon content was easily deposited, resulting in a low dissolution rate for the tablets.The water chemistry and flow is easy to be monitored for a clear boundary condition basin, so the results of karst carbon sink intensity with the hydrochemistry-runoff method is more accurate.Therefore,for calculating karst carbon sink intensity in the semi-arid regions,the hydrochemical-runoff method should be used.