榆林市土地退化中性评价
DOI:
作者:
作者单位:

西北大学城市与环境学院

作者简介:

通讯作者:

中图分类号:

基金项目:

国家自然科学基金资助项目(30700648)


Neutral assessment of land degradation in Yulin City
Author:
Affiliation:

College of Urban and Environmental Science,Northwest University

Fund Project:

The Program of the National natural Science Foundation of China,No.30700648

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    土地质量是保障粮食安全的重要因素之一,在维持社会经济的高质量发展和生态系统的可持续性发展方面发挥着举足轻重的作用。榆林市经济高速发展,资源化开发频繁,土地质量退化严重,土地退化是限制榆林市生态发展的重要因素,因此掌握其2000—2020年土地变化情况至关重要,通过土地退化中性(Land Degradation Neutrality,LDN)评估可以揭示土地变化情况。基于生态系统服务价值评估(Ecosystem Service Value,ESV)提出综合的LDN评估规则,分析榆林市2000—2020年的LDN变化情况。研究表明:(1)2000—2020年,榆林市的ESV总体上呈现出先升后降再升的趋势,其中2020年ESV最高为239.21亿元,2000年最低为232.03亿元,(2)基于ESV修订后的LDN评估:①土地利用/土地覆盖变化(Land-Use and Land-Cover Change,LUCC)稳定区域面积为37261.53km2,占比86.89%,恢复区域面积为2851.75km2,略大于退化区域面积2769.65km2;②2000—2020年净初级生产力(Net Primary Productivity,NPP)显著增加,增加、稳定和减少的区域面积分别为37501.55km2、5870.24km2和93.09km2,退化面积非常少;③土地有机碳(Soil Organic Carbon,SOC)稳定、恢复和退化的面积分别为37761.65km2、2756.83km2和2364.47km2,退化区域面积最少。④根据LUCC、NPP和SOC对LDN进行综合分析,研究结果表明榆林市LDN稳定、恢复和退化区域面积数值分别为4764km2、35057km2和3046km2,恢复区域面积最大,退化区域面积最小,2000—2020年榆林市实现了LDN目标。研究成果可为榆林市土地利用保护工作提供理论依据。

    Abstract:

    Land quality is one of the important factors to ensure food security, and it plays a significant role in maintaining the high-quality development of social economy and the sustainable development of ecosystem. With the rapid economic development and frequent resource exploitation in Yulin, the land quality is seriously degraded. Land degradation is a vital factor which limits the ecological development of Yulin, so it is very important to master the land change from 2000 to 2020. We can use Land degradation neutral (LDN) assessment to reveal land change. In a recent research, a comprehensive LDN assessment rule based on ecosystem service value (ESV) was proposed, so we chose this method to analyze the LDN changes in Yulin City from 2000 to 2020. The research showed that: (1) From 2000 to 2020, as a whole , the general trend of ESV in Yulin City experienced three phases. At first, it rose, then it fell, at last it rose again, with the highest ESV of 23.921 billion in 2020 and the lowest ESV of 23.203 billion in 2000. (2)The LDN assessment based on revised ESV: ①The area of Land-Use and Land-Cover Change (LUCC) stable region is 37261.53km2, which accounted for 86.89%. While , the area of Land-Use and Land-Cover Change (LUCC) recovery region is 2851.75km2, slightly larger than that of the degraded region whose area was 2769.65km2. ②During the twenty years from 2000 to 2020, the net primary productivity (NPP) increased significantly, and areas of increased region, stable region and decreased region were 37501.55 km2, 5870.24 km2, and 93.09 km2, respectively, with very little degradation area. ③ The stable region had the highest area of soil organic carbon (SOC) content, and its area is 37761.65 km2. Compared with that of stable region, the area of recovery region was smaller, it is 2756.83 km2. While, the degraded region area of soil SOC was least, just 2364.47 km2 . ④ We used a combinative way based on LUCC, NPP and SOC to perform a comprehensive analysis of LDN. The result showed that the area of stable region, recovery region and degraded region of LDN in Yulin City was 4764 km2, 35057 km2 and 3046 km2, respectively, with the largest recovery area and the smallest degraded area. The LDN target was achieved in Yulin City from 2000 to 2020. The research results of this paper can provide a theoretical basis for the land use and protection work in Yulin city.

    参考文献
    相似文献
    引证文献
引用本文

李敏,朱志梅,焦璇,褚夕,董少侠,张雪静.榆林市土地退化中性评价.生态学报,,(). http://dx. doi. org/[doi]

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数: