土地利用变化对喀斯特水体溶解无机碳、总氮和总磷输出的影响——以贵州普定沙湾模拟试验场为例
Effects of Land Use Change on Dissolved Inorganic Carbon,Total Nitrogen and Total Phosphorus Export to Karst Groundwater:A Case Study from the Shawan Simulation Test Site,Puding,Guizhou
查看参考文献47篇
|
文摘
|
耦联水生光合作用的碳酸盐岩风化碳汇是全球碳循环研究的关键问题,生物碳泵效应不仅能够稳定碳酸盐风化碳汇,也有利于改善水环境,而过量输入氮、磷会导致水环境变差。土地利用变化作为全球变化重要内容之一,对流域碳氮磷的输出具有重要影响,但关于土地利用变化对喀斯特水体溶解无机碳、总氮和总磷输出影响的研究有待进一步加强。本研究以贵州普定沙湾喀斯特试验场为研究对象,以研究土地利用变化对水文、水化学、溶解无机碳汇通量、总氮通量和总磷通量的影响。结果表明,流量、径流深、土壤CO_2浓度、pCO_2、HCO_3~-浓度和电导率呈现出夏秋季节高、春冬季节低的变化特征,与pH变化相反。样地间,土壤CO_2浓度、pCO_2、HCO_3~-浓度和电导率表现为草地>灌丛地>农耕地>裸土地>裸岩地,与pH变化相反。参与岩溶作用的土壤CO_2是造成水化学变化的主要原因。溶解无机碳汇通量和总氮通量呈现出夏秋季节高、春冬季节低的变化特征,总磷通量秋季最高、春季最低。样地间,草地溶解无机碳汇通量最大,HCO_3~-浓度是决定溶解无机碳汇通量大小的主导因素。有植被覆盖的土地利用方式的总氮、总磷浓度及其通量明显低于无植被生长的类型,总氮通量灌丛地最小,总氮浓度是决定总氮通量大小的主导因素,总磷通量草地最小,而流量是决定总磷通量大小的主导因素。综上,我们认为可以通过调整土地利用方式来达到增加岩溶碳汇和改善水环境双赢的目标。 |
|
其他语种文摘
|
Carbonate weathering coupled with aquatic photosynthesis (biological carbon pump-BCP) on the continents is a key issue in the study of global carbon cycle.The BCP can not only stabilize carbonate weathering-related sinks,but also improve water environment.The excessive import of nitrogen and phosphorus will lead to the deterioration of water environment.Land use change is one of the important contents of global change,which has an important impact on the output of carbon,nitrogen and phosphorus.However,the relationship between land use change and dissolved inorganic carbon,total nitrogen and total phosphorus export to karst groundwater needs further investigation.In this study,the Shawan Karst Test Site in Puding,Guizhou Province,was taken as the research object to study the effects of land use change on hydrology,hydrochemistry,dissolved inorganic carbon sink flux,total nitrogen flux and total phosphorus flux.The results showed that the discharge(Q),runoff depth(RD),soil CO_2 concentration,pCO_2,HCO_3~- concentration and electrical conductivity(EC) are higher in summer and autumn and lower in spring and winter,which is opposite to the change of pH.Between sample plots,soil CO_2 concentration,pCO_2,HCO_3~- concentration and EC showed grassland >shrub land >agricultural land >bare soil land >bare rock land,which is opposite to the change of pH.The main cause of hydrochemical change is soil CO_2 which is involved in karstification.Dissolved inorganic carbon sink flux and total nitrogen flux are higher in summer and autumn and lower in spring and winter.Total phosphorus flux is the highest in autumn and the lowest in spring.Between sample plots,dissolved inorganic carbon sink flux of grassland is the largest,and the HCO_3~- concentration is the dominating factor of dissolved inorganic carbon sink flux.The concentrations and fluxes of TN and TP in land use with vegetation cover were significantly lower than those without vegetation.The total nitrogen flux of shrub land is the smallest,and the total nitrogen concentration is the dominating factor of total nitrogen flux.The total phosphorus flux of grassland is the smallest,and the discharge is the dominating factor of total phosphorus flux.To sum up,we think that we can achieve the win-win goal of increasing carbonate weathering-related sink and improving water environment by adjusting land use. |
|
来源
|
地球与环境
,2022,50(4):547-557 【核心库】
|
|
DOI
|
10.14050/j.cnki.1672-9250.2022.50.002
|
|
关键词
|
土地利用
;
喀斯特
;
水化学
;
溶解无机碳汇通量
;
总氮通量
;
总磷通量
|
|
地址
|
1.
中国科学院地球化学研究所, 环境地球化学国家重点实验室, 贵阳, 550081
2.
中国地质大学(北京)水资源与环境学院, 北京, 100083
|
|
语种
|
中文 |
|
文献类型
|
研究性论文 |
|
ISSN
|
1672-9250 |
|
学科
|
社会与环境 |
|
基金
|
国家自然科学基金委-贵州喀斯特科学研究中心联合项目
|
|
文献收藏号
|
CSCD:7385304
|
参考文献 共
47
共3页
|
|
1.
Liu Z. Large and active CO_2 uptake by coupled carbonate weathering.
Earth Science Reviews,2018,182:42-49
|
CSCD被引
65
次
|
|
|
|
|
2.
Liu Z H. A possible important CO_2 sink by the global water cycle.
Chinese Science Bulletin,2008,53(3):402-407
|
CSCD被引
16
次
|
|
|
|
|
3.
刘再华. 岩石风化碳汇研究的最新进展和展望.
科学通报,2012,57(2/3):95-102
|
CSCD被引
84
次
|
|
|
|
|
4.
Jacobson A D. Silicate versus carbonate weathering in Iceland: New insights from Ca isotopes.
Earth and Planetary Science Letters,2015,416:132-142
|
CSCD被引
19
次
|
|
|
|
|
5.
Yang M. Organic carbon source tracing and DIC fertilization effect in the Pearl River: Insights from lipid biomarker and geochemical analysis.
Applied Geochemistry,2016,73:132-141
|
CSCD被引
24
次
|
|
|
|
|
6.
Yang R. Carbon sequestration and decreased CO_2 emission caused by terrestrial aquatic photosynthesis: Insights from diel hydrochemical variations in an epikarst spring and two spring-fed ponds in different seasons.
Applied Geochemistry,2015,63:248-260
|
CSCD被引
14
次
|
|
|
|
|
7.
Liu H. Diurnal hydrochemical variations in a karst spring and two ponds, Maolan Karst Experimental Site, China: Biological pump effects.
Journal of Hydrology,2015,522:407-417
|
CSCD被引
19
次
|
|
|
|
|
8.
蒋忠诚. 运用GIS和溶蚀试验数据估算中国岩溶区大气CO_2的汇.
中国岩溶,2000,19(3):212-217
|
CSCD被引
18
次
|
|
|
|
|
9.
袁道先. 碳循环与全球岩溶.
第四纪研究,1993,13(1):1-6
|
CSCD被引
91
次
|
|
|
|
|
10.
秦伯强. 湖泊富营养化及其生态系统响应.
科学通报,2013,58(10):855-864
|
CSCD被引
112
次
|
|
|
|
|
11.
Qin B. A drinking water crisis in lake Taihu, China: Linkage to climatic variability and lake management.
Environmental Management,2010,45(1):105-112
|
CSCD被引
120
次
|
|
|
|
|
12.
Srivastava J. Managing water quality with aquatic macrophytes.
Reviews in Environmental Science & Bio/technology,2008,7(3):255-266
|
CSCD被引
12
次
|
|
|
|
|
13.
苏孟白. 滇中尖山河流域不同土地利用类型产流及氮磷流失特征.
水土保持研究,2020,27(5):24-31
|
CSCD被引
7
次
|
|
|
|
|
14.
White W B. Thermodynamic equilibrium, kinetics, activation barriers, and reaction mechanisms for chemical reactions in Karst Terrains.
Environmental Geology,1997,30(1/2):46-58
|
CSCD被引
3
次
|
|
|
|
|
15.
Bronstert A. Effects of climate and land-use change on storm runoff generation: Present knowledge and modelling capabilities.
Hydrological Processes,2002,16(2):509-529
|
CSCD被引
31
次
|
|
|
|
|
16.
Yan J. Responses of water yield and dissolved inorganic carbon export to forest recovery in the Houzhai karst basin, southwest China.
Hydrological Processes,2014,28(4):2082-2090
|
CSCD被引
4
次
|
|
|
|
|
17.
赵瑞一. 旱季不同土地利用类型下岩溶碳汇效应差异.
环境科学,2015,36(5):1598-1604
|
CSCD被引
11
次
|
|
|
|
|
18.
章程. 不同土地利用下的岩溶作用强度及其碳汇效应.
科学通报,2011,56(26):2174-2180
|
CSCD被引
54
次
|
|
|
|
|
19.
蓝家程. 石漠化治理对岩溶作用强度的影响及其碳汇效应.
水土保持学报,2016,30(3):244-249
|
CSCD被引
12
次
|
|
|
|
|
20.
zturk M. Modeling the impact of land use change on the hydrology of a rural watershed.
Journal of Hydrology,2013,497:97-109
|
CSCD被引
1
次
|
|
|
|
|
了解气象卫星更多信息，请访问