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城市生态系统土壤碳库特征及其演变研究

发表时间:2011-10-15  浏览量:1451  下载量:428
全部作者: 王成,刘勇,刘秀华,慈恩,罗瑾
作者单位: 西南大学资源环境学院
摘 要: 城市化地区土壤地表的封闭压实、表土的人为扰动、外来植物的入侵、落叶的清扫等,都将影响城市土壤的碳储量。城市化地区不同功能区、不同植被覆盖区的土壤碳密度和碳库存在时空演变特征,研究发现:城市碳密度在不同功能区表现为休闲区>工业区>交通区>文教区>行政/居民区,在城乡梯度带表现为城区>近郊>远郊,不同覆被下由高到低依次为林地、园地、裸地;碳密度在时间序列上随着城市的进程表现出逐渐升高的趋势。土壤碳库在不同功能区有较大的空间变异性,并随着时间推移总量呈现下降趋势。最后指出城市化地区土壤碳库的研究方向。
关 键 词: 农业生态学;土壤碳库;综述;城市化;功能分区
Title: Study on soil carbon storage of urban ecosystem and its dynamic evolution
Author: WANG Cheng, LIU Yong, LIU Xiuhua, CI En, LUO Jin
Organization: College of Resources and Environment, Southwest University
Abstract: Urban soil exhibits different features, such as soil compaction, artificial disturbance of topsoil, invasiveness of alien plants, cleaning of fallen leaves and so on, which have an impact on the carbon storage of urban soil. There are some spatial-temporal evolution characteristics of soil carbon density and storage in urbanized area, including the various functional zones, the different vegetation cover zones. Study shows that the density of carbon in different urban districts can be ranged in the following order, from the largest figure to the smallest one is recreational district, industrial district, traffic district, cultural and educational district, and administrative and residential district. As to the urban-rural gradient the order is urban, suburban and suburbs. Under different cover from high to low is forest land, garden, bare ground. With the process of city development, the carbon density has a trend of growing in terms of time series. Soil carbon pools in different functional areas have a greater spatial variability, and generally tend to slow down in total. Then the future research of soil carbon storage in urbanized area is prospected.
Key words: agricultural ecology; soil carbon storage; reviews; urbanization; functional zoning
发表期数: 2011年10月第19期
引用格式: 王成,刘勇,刘秀华,等. 城市生态系统土壤碳库特征及其演变研究[J]. 中国科技论文在线精品论文,2011,4(19):1707-1713.
 
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