城市化进程中土地利用方式改变对土壤有机碳库的影响——以上海三林楔形绿地为例

doi:10.3969/j.issn.1004-1524.2021.06.11

浙江农业学报 ›› 2021, Vol. 33 ›› Issue (6): 1062-1068.DOI: 10.3969/j.issn.1004-1524.2021.06.11

城市化进程中土地利用方式改变对土壤有机碳库的影响——以上海三林楔形绿地为例

张青青¹^,²(), 梁晶¹^,²^,^*(), 伍海兵¹^,², 郑思俊¹^,², 黄军华¹^,²

1.上海市园林科学规划研究院,上海 200232
2.上海城市困难立地绿化工程技术研究中心,上海 200232

收稿日期:2020-07-07 出版日期:2021-06-25 发布日期:2021-06-25
通讯作者: 梁晶
作者简介:*梁晶,E-mail: liangjing336@163.com
张青青(1992—),女,山西运城人,硕士,工程师,主要从事城市土壤质量评价与改良修复的研究。E-mail: qqzhang19921119@163.com
基金资助:
国家重点研发计划(2017YFC0505706);上海市科学技术委员会科技专项(17DZ1202801)

Effect of land use change on soil organic carbon pool in process of urbanization: a case study of Sanlin Green Wedge, Shanghai

ZHANG Qingqing¹^,²(), LIANG Jing¹^,²^,^*(), WU Haibing¹^,², ZHENG Sijun¹^,², HUANG Junhua¹^,²

1. Shanghai Academy of Landscape Architecture Science and Planning, Shanghai 200232, China
2. Shanghai Engineering Research Center of Landscaping on Challenging Urban Sites, Shanghai 200232, China

Received:2020-07-07 Online:2021-06-25 Published:2021-06-25
Contact: LIANG Jing

摘要/Abstract

摘要：

研究城市化进程中土地利用方式转变引起的有机碳含量变化,识别土壤有机碳的空间格局,对城镇化建设具有重要指导作用。以上海市三林楔形绿地为对象,通过遥感影像资料获取其土地利用方式和面积,并通过对不同土地利用方式的土壤进行采样,分析土地利用变化对土壤有机碳含量和密度的影响,估算三林楔形绿地拟建成后的土壤有机碳储量。结果表明:三林楔形绿地开放土壤和封闭土壤有机碳含量分别为7.51 g·kg^-1和4.67 g·kg^-1,绿地开放土壤有机碳含量和密度显著(P<0.05)高于封闭土壤。相比现有土壤有机碳储量(2.99×10⁴ t),拟建成后土壤有机碳库变化较大,有机碳储量预估可达到6.29×10⁴ t,其中开放土壤的有机碳储量为5.38×10⁴ t,约为现有土壤有机碳储量的1.8倍。本研究阐明城镇化建设中土地利用方式转变对土壤有机碳库的影响,对准确量化城市化土壤有机碳库及评估城市碳平衡具有重要意义。

关键词: 城市化, 土地利用方式, 楔形绿地, 开放土壤, 封闭土壤, 有机碳储量

Abstract:

Studying the change of soil organic carbon content in the process of urbanization and identifying the spatial pattern of soil organic carbon will play a guiding role in the study of urban building. In this study, the land use pattern and area were obtained by remote sensing image data, the influence of land use change on soil organic carbon content and density was analyzed, and the soil organic carbon storage of Sanlin Green Wedge to be built was estimated. The results showed that the organic carbon content of unsealed soil and sealed soil were 7.51 g·kg^-1 and 4.67 g·kg^-1, respectively. The content and density of soil organic carbon in unsealed green space was significantly (P<0.05) higher than that in sealed soil. The existing soil organic carbon storage was about 2.99×10⁴ t. Compared with the current situation, the soil organic carbon pool changed greatly after the proposed construction, and the estimated organic carbon storage could reach 6.29× 10⁴ t. The unsealed soil organic carbon storage was 5.38×10⁴ t, which was about 1.8 times of the existing soil organic carbon storage. This study elucidated the impact of land use change on soil organic carbon pool in the process of urbanization, which was of great significance for accurately quantifying the soil organic carbon pool of urbanization and evaluating urban carbon balance.

Key words: urbanization, land use, green wedge, unsealed soil, sealed soil, organic carbon storage

中图分类号:

张青青, 梁晶, 伍海兵, 郑思俊, 黄军华. 城市化进程中土地利用方式改变对土壤有机碳库的影响——以上海三林楔形绿地为例[J]. 浙江农业学报, 2021, 33(6): 1062-1068.

ZHANG Qingqing, LIANG Jing, WU Haibing, ZHENG Sijun, HUANG Junhua. Effect of land use change on soil organic carbon pool in process of urbanization: a case study of Sanlin Green Wedge, Shanghai[J]. Acta Agriculturae Zhejiangensis, 2021, 33(6): 1062-1068.

图/表 7

图1 三林楔形绿地遥感影像

Fig.1 Remote sensing image of Sanlin Green Wedge

图2 三林楔形绿地土地利用方式的变化

Fig.2 Change of land use patterns in Sanlin Green Wedge

表1 三林楔形绿地土壤有机碳含量和密度的现状

Table 1 Status of soil organic carbon content and density in Sanlin Green Wedge

指标 Index	最小值 Minimum	最大值 Maximum	平均值 Average	标准差 Standard deviation	变异系数 CV/%	偏度 Skewness	峰度 Kurtosis
有机碳	1.66	16.12	5.31	2.57	48.39	5.28	2.00
Soil organic carbon/(g·kg^-1)
有机碳密度	8.74	212.84	59.30	36.92	62.27	4.70	1.80
Soil organic carbon density/(t·hm^-2)

图3 三林楔形绿地土壤有机碳含量的空间分布

Fig.3 Spatial distribution of soil organic carbon content in Sanlin Green Wedge

图4 三林楔形绿地土壤有机碳密度的空间分布

Fig.4 Spatial distribution of soil organic carbon density in Sanlin Green Wedge

表2 三林楔形绿地土地利用方式转变后土壤密度、厚度、有机碳含量的变化

Table 2 Changes of soil bulk density, soil thickness and organic carbon content after land use change in Sanlin Green Wedge

土地利用方式 Land use pattern		土壤密度 Soil bulk density/ (g·cm^-3)	土壤厚度 Soil thickness/cm	土壤有机碳含量 Soil organic carbon content/(g·kg^-1)
现状Current situation	拟建成Future situation	土壤密度 Soil bulk density/ (g·cm^-3)	土壤厚度 Soil thickness/cm	土壤有机碳含量 Soil organic carbon content/(g·kg^-1)
开放土壤Unsealed soil	开放土壤Unsealed soil	1.32	100.0	17.68
开放土壤Unsealed soil	封闭土壤Sealed soil	1.55	65.3	7.51
封闭土壤Sealed soil	封闭土壤Sealed soil	1.55	65.3	4.67
封闭土壤Sealed soil	开放土壤Unsealed soil	1.32	100	17.68

图5 三林楔形绿地土地利用方式转变后土壤有机碳储量变化

Fig.5 Changes of soil organic carbon storage after land use change in Sanlin Green Wedge

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城市化进程中土地利用方式改变对土壤有机碳库的影响——以上海三林楔形绿地为例

Effect of land use change on soil organic carbon pool in process of urbanization: a case study of Sanlin Green Wedge, Shanghai

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