生态恢复背景下陕甘宁地区NPP变化及其固碳释氧价值

王姝; 张艳芳; 位贺杰; 张宏运

doi:10.7522/j.issn.1000-694X.2014.00196

中国沙漠 >

2015 , Vol. 35 >Issue 5: 1421 - 1428

DOI: https://doi.org/10.7522/j.issn.1000-694X.2014.00196

生态与经济

生态恢复背景下陕甘宁地区NPP变化及其固碳释氧价值

王姝 ,
张艳芳 ,
位贺杰 ,
张宏运

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陕西师范大学旅游与环境学院, 陕西西安 710119

王姝(1991-),女,山西省运城市人,硕士研究生,主要从事水土资源评价与生态低碳研究。Email: wangshu_vip@163.com

收稿日期: 2014-10-15

修回日期: 2014-11-24

网络出版日期: 2015-09-20

基金资助

教育部人文社科研究规划基金项目(10XJA790011);国家自然科学基金项目(41371523);国家社会科学基金项目(14XKS019)

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The NPP Change and the Vegetation Carbon Fixation/Oxygen Release Values in Shaanxi-Gansu-Ningxia Region of China

Wang Shu ,
Zhang Yanfang ,
Wei Hejie ,
Zhang Hongyun

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College of Tourism and Environment, Shaanxi Normal University, Xi'an 710119, China

Received date: 2014-10-15

Revised date: 2014-11-24

Online published: 2015-09-20

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摘要

基于MODIS NPP(植被净初级生产力)数据,利用线性趋势法、ESDA(Exploratory Spatial Data Analysis)及固碳释氧价值模型,探讨2000—2012年生态恢复背景下陕甘宁地区NPP变化及其原因,并评估NPP变化的固碳释氧价值。结果表明:(1)2000—2012年,陕甘宁地区NPP年增长率为4.3%,总体呈现阶段性增长趋势,其中有两次持续增长期;(2)陕甘宁地区NPP受水热格局影响显著,整体呈现东南高、西北低空间分布特征,空间集聚显著,但研究期内集聚水平呈下降态势,与退耕还林还草工程由前期的局部试点向后期的全区扩散相互印证;(3)陕甘宁地区NPP增长趋势是人类活动和气候因素共同作用的结果,其中人类活动为主要驱动因素,尤其是退耕还林还草工程的实施;④生态恢复背景下,陕甘宁地区植被固碳量累计增加1.06×10⁷ t,释氧量累计增加2.7×10⁷ t,固碳释氧价值累计增加9.34×10¹⁰元。生态恢复创造效益比较明显。

关键词： 植被覆盖; 固碳; 释氧; 退耕还林还草; Moran指数; 陕甘宁地区

本文引用格式

王姝 , 张艳芳 , 位贺杰 , 张宏运 . 生态恢复背景下陕甘宁地区NPP变化及其固碳释氧价值[J]. 中国沙漠, 2015 , 35(5) : 1421 -1428 . DOI: 10.7522/j.issn.1000-694X.2014.00196

Abstract

Based on the MODIS-NPP data and the linear trend method, vegetation carbon fixation/oxygen release values assessment model, ESDA (Exploratory Spatial Data Analysis) method, we analyzed the NPP change, values of fixing carbon and releasing oxygen, and the influence factors in Shaanxi-Gansu-Ningxia Region during 2000-2012. (1)From 2000 to 2012, the NPP's growth in Shaanxi-Gansu-Ningxia Region showed periodic growth trend, and there were two sustained growth periods, and the annual growth rate was 4.3%. (2)The NPP in Shaanxi-Gansu-Ningxia Region was affected by hydrothermal pattern obviously, overall the NPP was higher in northwest than in southeast, and the agglomeration level appeared downward trend during the study period. It was related to the implementation of returning farmland to forest/grassland project in 1999-2003. (3)The growth trend of NPP was affected by human activity and climate factors. Among them, human activity was the main driver, in particular, the implementation of the returning farmland to forest/grassland project. (4)In the background of ecological restoration, the vegetation carbon fixation was cumulatively increased by 1.06×10⁷ t and the oxygen released cumulatively increased by 2.7×10⁷ t in Shaanxi-Gansu-Ningxia Region, so the returning farmland to forest/grassland project created ecological benefits significantly.

Key words： vegetation cover; carbon fixation; oxygen release; returning farmland to forest/grassland; Moran's index; Shaanxi-Gansu-Ningxia Region

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