浙江农业学报 ›› 2019, Vol. 31 ›› Issue (2): 291-296.DOI: 10.3969/j.issn.1004-1524.2019.02.15

• 环境科学 • 上一篇    下一篇

1979—2020年杭州市富阳区土地利用对耕层土壤有机碳储量变化的影响

邱乐丰1, 虞舟鲁2   

  1. 1.浙江财经大学 土地与城乡发展研究院,浙江 杭州 310018;
    2.浙江大学 农业遥感与信息技术研究所,浙江 杭州 310058
  • 收稿日期:2017-07-02 出版日期:2019-02-25 发布日期:2019-03-06
  • 作者简介:邱乐丰(1985—),男,浙江湖州人,博士,副研究员,主要从事土地生态与城乡发展等方面的研究。E-mail: qlf25@163.com
  • 基金资助:
    杭州市哲学社会科学规划课题(Z18JC051)

Land use changes induced soil organic carbon stock variations in cropland soils in Fuyang District, Hangzhou City in 1979-2020

QIU Lefeng1, YU Zhoulu2   

  1. 1. Institute of Land and Urban-Rural Development,Zhejiang University of Finance and Economics, Hangzhou 310018, China;
    2.Institute of Agricultural Remote Sensing and Information Technology, Zhejiang University, Hangzhou 310058, China
  • Received:2017-07-02 Online:2019-02-25 Published:2019-03-06

摘要: 土地利用变化对陆地生态系统碳储量变化影响显著,在制定土地政策时,必须考虑土地利用变化对土壤碳储量的动态影响。以杭州市富阳区为研究对象,探讨了1979—2006年间土地利用变化对碳储量的影响,并预测评价了县区级土地利用规划政策对土壤碳库的影响。结果显示:研究区1979—2006年间土地利用变化导致全区植被碳总量损失为273.4 Gg,表层土壤(0—20 cm)有机碳总量损失为771.0 Gg,建设占用耕地和林地是导致土壤碳储量下降的主要原因。预测2006—2020年间研究区植被碳损失的年均速率将减至25.93 kg·hm-2,土壤有机碳损失的年均速率将减至27.48 kg·hm-2。制定合理政策和有效措施来保护林地,抑制建设用地增长,扭转土壤碳损失趋势势在必行。

关键词: 碳库存, 植被碳, 碳密度, 土地利用规划, 城市化, 造林

Abstract: Land use change (LUC) is the most dynamic force in terrestrial carbon stock change, and it is imperative to account for the dynamics of LUC in carbon stock change when forming land use policies. In the present study, the impacts of LUCs on carbon (C) stocks were explored at a county scale and the changes of soil C stocks were detected within a county-scale land use planning policy. The LUCs within 1979-2006 in Fuyang and Fuyang Land Use Master Planning (FLUMP) (2006-2020) were selected for this study. The estimates of C stock changes were examined by compiling vegetation and soil organic C density data from six land use types, and through literature reviews and field surveys. The results showed that LUCs between 1979 and 2006 already caused a vegetation carbon (VC) decrease of 273.4 Gg and a soil (0-20 cm layer) organic carbon (SOC) decrease of 771.0 Gg, mainly due to the urbanization processes. Furthermore, the FLUMP (2006-2020) was expected to cause a potential annual C decline of 25.93 kg·hm-2 for VC and 27.48 kg·hm-2 for SOC during 2006-2020. As the situation stands, it is urgent to devise rational policies and effective measures to reverse the C loss process.

Key words: carbon stock, vegetation carbon, carbon density, land use planning, urbanization, afforestation

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