CAJ | 학술논문

为了解岩溶丘陵区不同地貌条件对于土壤钙元素迁移或富集的影响，选择粤北英德市九龙镇典型岩溶丘陵区2座山丘作为研究区，分别对顶部、峭壁、坡麓、积水洼地和干旱沟谷进行了岩石裸露率、土层厚度和植被等调查；并采集不同样地土壤，利用原子吸收分光光度计测定了土壤中全钙、交换性钙、水溶性钙质量分数，结果表明：积水洼地土壤的全钙质量分数最高，达62.397 g/kg；其次是丘顶、坡麓、峭壁、沟谷，积水洼地的交换性钙和水溶性钙质量分数同样为最高，分别是4.582和0.223 g/kg，交换性钙和水溶性钙在丘顶、峭壁、坡麓和沟谷4个部位土壤中的差异不明显，分别在1.560~2.421 g/kg之间和0.057~0.180 g/kg之间。研究表明，土壤的碳酸盐质量分数和pH值与全钙、交换性钙、水溶性钙都呈极显著正相关，全钙与交换性钙、交换性钙与水溶性钙有极显著正相关；地形不仅影响土壤钙水平方向的分布，还影响其垂向分布。
위료해암용구릉구불동지모조건대우토양개원소천이혹부집적영향，선택월북영덕시구룡진전형암용구릉구2좌산구작위연구구，분별대정부、초벽、파록、적수와지화간한구곡진행료암석라로솔、토층후도화식피등조사；병채집불동양지토양，이용원자흡수분광광도계측정료토양중전개、교환성개、수용성개질량분수，결과표명：적수와지토양적전개질량분수최고，체62.397 g/kg；기차시구정、파록、초벽、구곡，적수와지적교환성개화수용성개질량분수동양위최고，분별시4.582화0.223 g/kg，교환성개화수용성개재구정、초벽、파록화구곡4개부위토양중적차이불명현，분별재1.560~2.421 g/kg지간화0.057~0.180 g/kg지간。연구표명，토양적탄산염질량분수화pH치여전개、교환성개、수용성개도정겁현저정상관，전개여교환성개、교환성개여수용성개유겁현저정상관；지형불부영향토양개수평방향적분포，환영향기수향분포。
Two hills in a typical Karst hilly area in Jiulong, Yingde, were selected as the study area. To understand soil calcium element migration and enrichment in different geomorphic conditions in Karst area, the bareness rate of rock, soil thickness and vegetation at hill top, cliff, slope, dry gully, hill foot and water depression were surveyed, and different soil samples were collected. Atomic absorption spectrophotometer was used to measure the contents of total calcium, exchangeable calcium, and water soluble calcium. The results showed that the total calcium content of soil in water depression was 62.397 g/kg, the highest in all the geomorphic locations, next were hill top, slope, cliff, and gully successively. The highest contents of exchangeable calcium and water soluble calcium also occurred in the soil of water depression, which were, respectively, 4.582 and 0.223 g/kg. The contents of exchangeable calcium and water soluble calcium were not significantly different at hill top, slope, cliff, and gully, which were 1.560-2.421 g/kg and 0.057-0.180 g/kg respectively. The research indicated that soil carbonate content and pH value had significant positive correlations with total calcium, exchange calcium, and water soluble calcium. There were significant positive correlationship between total calcium and exchange calcium, and between exchange calcium and water soluble calcium. It was shown that terrain affected not only the horizontal but also the vertical distribution of soil calcium.