Evaluation of Carbon Source or Sink of Vegetation and Soil System in Shaanxi Loess Platform Region

MA Caihong; REN Zhiyuan

doi:10.13961/j.cnki.stbctb.2015.03.049

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Evaluation of Carbon Source or Sink of Vegetation and Soil System in Shaanxi Loess Platform Region

- Evaluation of Carbon Source or Sink of Vegetation and Soil System in Shaanxi Loess Platform Region
- Bulletin of Soiland Water Conservation Vol. 35, Issue 3, Pages: 231-234(2015)
- 作者机构：
  
  1. 陕西师范大学旅游与环境学院,陕西,西安,710062
  2. 陕西理工学院秦岭与蜀道地理研究所,陕西,汉中,723001
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2015.03.049
  CLC：
- Published：2015
- 稿件说明：
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MA Caihong, REN Zhiyuan. Evaluation of Carbon Source or Sink of Vegetation and Soil System in Shaanxi Loess Platform Region[J]. Bulletin of Soiland Water Conservation, 2015, 35(3): 231-234.
DOI：

MA Caihong, REN Zhiyuan. Evaluation of Carbon Source or Sink of Vegetation and Soil System in Shaanxi Loess Platform Region[J]. Bulletin of Soiland Water Conservation, 2015, 35(3): 231-234. DOI： 10.13961/j.cnki.stbctb.2015.03.049.

摘要

[目的] 为土地利用的低碳战略提供决策依据。[方法] 基于GIS和RS分析与处理NDVI数据和Landsat遥感影像数据源

采用CASA光能利用模型对陕西黄土台塬区植被-土壤系统的碳收支进行估算。[结果] 1990-2010年陕西黄土台塬区植被-土壤系统碳源效应明显。其中

咸阳台塬区、宝鸡台塬区和西安台塬区有所减弱

但渭南台塬区和铜川台塬区有所增强。研究时段内

陕西黄土台塬区的高碳源区的面积由38.22%缩减为21.13%

中碳源区由57.40%扩大为67.71%

低碳塬区由3.43%扩大为7.76%;碳汇区由0.96%扩大为3.40%。[结论] 1990-2010年该区建设用地占用耕地、林地、草地

土地利用结构变化不利于碳固定

提高复种指数有利于降低植被-土壤系统的碳排放。

Abstract

[Objective] To provide a decision basis for low-carbon strategy of land use and land cover change. [Methods] Based on RS and GIS

taking the data source of NDVI and Landsat

the carbon of vegetation and soil system in Shaanxi Loess platform region during 1990-2010 was calculated by the Carnegie-Ames-Stanford Approach(CASA) model. [Results] Large part in the research area was carbon source

however

the carbon sink area were small and mainly distributed in the northern part in Weinan loess platform. During the research period

the carbon source degree in Xianyang loess platform

Baoji loess platform and Xi'an loess platform decreased

whereas

of which in Weinan loess platform and Tongchuan platform increased in some degree. From 1990 to 2010

the high degree carbon source area decreased from 38.22% to 21.13%

middle degree carbon source area were the largest and improved from 57.40% to 67.71%

and the area of low degree carbon source increased from 3.43% to 7.76%.At the same period

the area of carbon sink enlarged from 0.96% to 3.40%. [Conclusion] Cultivated land

forest land and grass land were changed into built-up land were not benefit to the carbon sink

and the enhancing of cropping index benefit to the carbon sink of vegetation and soil system.

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