路南石林地区土壤空气中CO_2浓度分布规律与土下溶蚀形态研究  

THE CASE STUDY OF SUBSOIL SOLUTION FEATURES AND SOIL CO_2 CONCENTRATION IN STONE FOREST REGION, LUNAN, YUNNAN, CHINA

作　　者：梁福源[1] 宋林华[1] 王富昌[2] 郑炳元 张丽萍 

机构地区：[1]中国科学院地理研究所,北京100101 [2]石林风景名胜区管理局,云南石林652211

出　　处：《中国岩溶》2000年第2期180-187,共8页Carsologica Sinica

基　　金：石林研究基金项目资助!( 1 9990 3 )

摘　　要：研究了路南石林地区不同植被、石灰岩表面溶沟内土壤空气中CO2 浓度的分布规律及石牙 -土壤接触带土壤空气 CO2 浓度。讨论了土下溶蚀形态特征与土壤 CO2 浓度分布规律间的对应关系。研究表明 ,土下溶蚀形态主要发育在土下 0 .2 0～ 0 .6 0 m处 ,与土壤空气 CO2浓度分布规律相吻合 ;不同植被对土壤 CO2 浓度的影响次序为 :人工草坪 >柏树林 >天然草被 >松林 >无植被耕地 ;有土溶沟中土壤水的溶蚀能力比无土壤溶沟水高出一倍到几倍 ;与 CO2 处于动力平衡的土壤水的潜蚀能力达到 73.2 4 2～ 2 0 2 .2 75mg/ l。WT5BZ]Soil CO 2 concentration (SCC) in gully and soil rock interface in Lunan Stone Forest was studied to find the relationship between SCC and subsoil solution features. Results show that (1)the subsoil solution feature mainly formed at depth 0.2~0.6m below the ground surface, where SCC is max; (2)the influence of different vegetations on SCC ranges in such a decreasing order: vigorous lawn→cypress forest→scattered grassland→pine forest→cultivated land without vegetation; (3)the solution capacity of soil water in gully with soil is a few times more than that of water in gully without soil, (4)the potential solution capacity of soil water in equilibrium with soil CO 2 is estimated from 73.242 mg/l to 202 275 mg/l in the period from April to June, 1999.

关 键 词：土下溶蚀形态 土壤空气 分布规律 二氧化碳浓度 

分 类 号：P931.5[天文地球—自然地理学]