桂林盘龙洞岩溶表层带土壤CO2浓度的季节变化研究
以桂林盘龙洞岩溶实验场为例,选择岩溶洼地里的坡地和洼地2个样地,通过长期定时监测土壤CO2浓度变化,表明:(1)土壤CO2浓度具有明显的季节性变化特征,夏季(6—8月)土壤CO2浓度是其它时期的2~3倍,并显示与气温、降水和生物活动密切相关;(2)洼地地段土壤CO2浓度比坡地地段要高,尤其夏季时洼地比坡地高近1000mg/m2;(3)在垂直剖面上,大多数的情况下土壤CO22浓度随土壤深度的递增而升高,但在雨季时坡地(-50cm与-80cm处)和洼地(-80cm与-100am处)的土壤CO2浓度随深度的增加而降低。...
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Published in | 中国岩溶 Vol. 30; no. 3; pp. 348 - 353 |
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Main Author | |
Format | Journal Article |
Language | Chinese |
Published |
广西师范大学生命科学学院,广西桂林541004
2011
中国地质科学院岩溶地质研究所国土资源部岩溶动力学开放实验室,广西桂林541004 广西师范大学生命科学学院,广西桂林541004%中国地质科学院岩溶地质研究所国土资源部岩溶动力学开放实验室,广西桂林,541004 云南省红河热带农业科学研究所,云南河口661300%中国地质科学院岩溶地质研究所国土资源部岩溶动力学开放实验室,广西桂林541004 |
Subjects | |
Online Access | Get full text |
ISSN | 1001-4810 |
DOI | 10.3969/j.issn.1001-4810.2011.03.018 |
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Summary: | 以桂林盘龙洞岩溶实验场为例,选择岩溶洼地里的坡地和洼地2个样地,通过长期定时监测土壤CO2浓度变化,表明:(1)土壤CO2浓度具有明显的季节性变化特征,夏季(6—8月)土壤CO2浓度是其它时期的2~3倍,并显示与气温、降水和生物活动密切相关;(2)洼地地段土壤CO2浓度比坡地地段要高,尤其夏季时洼地比坡地高近1000mg/m2;(3)在垂直剖面上,大多数的情况下土壤CO22浓度随土壤深度的递增而升高,但在雨季时坡地(-50cm与-80cm处)和洼地(-80cm与-100am处)的土壤CO2浓度随深度的增加而降低。 |
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Bibliography: | Panlong Cave in Guilin; epikarst; soil CO2 ; temperature 45-1157/P LI Tao, CAO Jian-hua , ZHANG Mei-liang , HUANG Yan-mei , CHEN Jia-rui, YAN Yi-ping , LI Guang-chao , ZHU Xiao-yan (1. Karst Dynamics Laboratory, Institute of Karst Geology, CAGS, Guilin, Guangxi 541004, China ; 2. The College of Life Science, Guangoci Normal University, Guilin, Guangxi 541004 , China 3. Honghe Tropical Agriculture Research Institute of Yunnan, Hekou Yunnan 661300, China) Taking the Panlong Cave karst experimental site in Guilin as a case, long-term survey on soil CO2 concentration variations at regular intervals is done in two sample plots - depression bottom and slope. The result shows that: (1)The soil CO2 concentration varies seasonally obviously. In the summer (May to Au- gust), the soil CO2 concentration is two or three times higher than that in the other periods. And it is closely related with temperature, precipitation and biological activities; (2)The soil CO2 concentration at the depres- sion bottom is higher than that o |
ISSN: | 1001-4810 |
DOI: | 10.3969/j.issn.1001-4810.2011.03.018 |