西安市城区表层土壤碳储量与分布特征

段保正; 石辉; 魏小芳; 李余; 蒋子银; 陈越浦

doi:10.13961/j.cnki.stbctb.2016.06.049

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西安市城区表层土壤碳储量与分布特征

试验研究

- 西安市城区表层土壤碳储量与分布特征
- Surface Soil Carbon Storage and Distribution in Xi'an City
- 水土保持通报 2016年36卷第6期页码：293-297
- 作者机构：
  
  西安建筑科技大学环境与市政工程学院陕西省环境工程重点实验室,陕西,西安,710055
- 作者简介：
- 基金信息：
  
  陕西省自然科学重点项目“城市生态系统中碳库特征及其演变规律对城市扩张的响应”（2014JZ011）
- DOI：10.13961/j.cnki.stbctb.2016.06.049
  中图分类号：
- 纸质出版：2016
- 稿件说明：
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段保正, 石辉, 魏小芳, 等. 西安市城区表层土壤碳储量与分布特征[J]. 水土保持通报, 2016,36(6):293-297.

DUAN Baozheng, SHI Hui, WEI Xiaofang, et al. Surface Soil Carbon Storage and Distribution in Xi'an City[J]. Bulletin of Soiland Water Conservation, 2016, 36(6): 293-297.
段保正, 石辉, 魏小芳, 等. 西安市城区表层土壤碳储量与分布特征[J]. 水土保持通报, 2016,36(6):293-297. DOI： 10.13961/j.cnki.stbctb.2016.06.049.

DUAN Baozheng, SHI Hui, WEI Xiaofang, et al. Surface Soil Carbon Storage and Distribution in Xi'an City[J]. Bulletin of Soiland Water Conservation, 2016, 36(6): 293-297. DOI： 10.13961/j.cnki.stbctb.2016.06.049.

摘要

[目的

]

研究城市的土壤碳储量与分布特征，为进一步认识城市碳固定和碳循环提供科学依据。[方法

]

采集西安市绕城高速内不同土地利用/功能区表层土壤样品230个（0-20 cm），利用Vario ELⅢ元素分析仪进行有机碳分析。[结果

]

西安市城区表层土壤有机碳在0.88~27.18 g/kg之间，均值为5.59 g/kg；碳密度0.22~7.11 kg/m

，均值为1.41 kg/m

；在西安市城区表层土壤总储碳量为6.32×10

t，平均每1 km

的土壤碳储量为1.37×10

t。风景休闲区和交通区是城区土壤有机碳含量较高的区域，而工业区有机碳含量较低。在空间上，以中心城区形成一个南北带状分布的有机碳高值区。[结论

]

西安市城区的这种有机碳分布模式，与城市化前的土壤利用、城市绿地管理，食物与燃料的残余物、各种废水等大量生活垃圾进入土壤有关。交通道路的有机碳含量也受到汽车尾气排放的黑炭沉降影响。整体上，西安市城区有机碳显著低于国内其它城市的有机碳含量。

Abstract

[Objective] With the development of urbanization

a large number of natural lands or agricultural lands are changed into urban land

which bring about dramatic changes in soil carbon stocks. It has an important significance for understanding of urban soil carbon pools and the response to global change to research the soil carbon storage in city area.[Methods] The inner Xi'an beltway area was selected as research range

where the soil carbon pool was researched. Total 230 surface soil samples under different land uses/functions were collected

and soil organic carbon of each sample was analyzed by Vario ELⅢ elementer.[Results] The soil organic carbon ranged 0.88~27.18 g/kg with a mean of 5.59 g/kg; and the organic carbon density was 0.22~7.11 kg/m2 with a mean of 1.41 kg/m2. The total carbon storage was 6.32×105 t in the city area of inner Xi'an beltway

the average per square kilometer was 1.37×103 t. The scenic recreation and traffic area were the regions with high soil organic carbon content

and the industrial zone was relatively lower. A north-south strip of high soil organic carbon with city center as concentrated core was recognized.[Conclusion] The soil organic carbon distribution pattern of Xi'an City maybe relate to some indices prior to urbanization

as soil use

green management

garbage of food and fuel residues and waste water into the soil. The organic carbon content near traffic road was affected by black carbon settlement from vehicle exhaust emissions. The overall topsoil organic carbon content of Xi'an urban was significantly lower than that of other domestic cities.

关键词

Keywords

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