摘要
本研究选择了具有我国南方岩溶石山地区特点的桂林丫吉村试验场为研究场区，对其岩溶土壤的ＣＯ２浓度变化、岩溶泉水和土壤水水化学指标、石灰岩的溶蚀作用进行了定位长期观测。观测结果显示：（１）土壤ＣＯ２浓度的季节变化在泉水和土壤水水化学上均能反映出来；（２）两个土壤剖面的石灰岩溶蚀试验结果均表明，溶蚀强度随不同土壤深度的ＣＯ２浓度的变化基本是一致的，但土壤水分的差异会造成溶蚀强度的正叠加；（３）两个土壤剖面由于所处小环境、土壤结构和与下垫面灰岩关系不同，使得其中ＣＯ２浓度历月变化特征有一定差异。
A fixed position observation have been carried out in Guilin experimental site since 1995. The main observed items include soil CO_2 concentration, the hydrochemistry of spring and soil water, and limestone corrosion rate etc.. The results indicate : (1)The seasonal change in soil CO_2 concentration can be reflected from the hydrochemistry of spring and soil water; (2)The corrosion test results of limestone tablets from two soil profiles show that the intensity of corrosion changes with soil CO_2 concentration, and the moisture content of soil will strengthen the intensity of corrosion process; (3)Because of different soil profiles located in different environment, different soil structure and its relation to underlying carbonate rock, the monthly variation in soil CO_2 concentration has different characteristics.
出处
《中国岩溶》
CAS
CSCD
1997年第4期319-324,共6页
Carsologica Sinica
基金
地矿部岩溶动力学开放研究实验室资助
