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草业学报 ›› 2016, Vol. 25 ›› Issue (1): 47-63.DOI: 10.11686/cyxb2015073

• 研究论文 • 上一篇    下一篇

1982-2013年新疆不同植被生长时空变化

许玉凤1, 2, 杨井1*, 李卫红1, 方功焕1, 2, 张淑花1, 2, 邓海军1, 2, 董杰3   

  1. 1.中国科学院新疆生态与地理研究所,荒漠与绿洲生态国家重点实验室,新疆 乌鲁木齐 830011;
    2.中国科学院大学,北京 100049;
    3.聊城大学环境与规划学院,山东 聊城 252000
  • 收稿日期:2015-02-05 出版日期:2016-01-20 发布日期:2016-01-20
  • 通讯作者: *通信作者Corresponding author. E-mail: yangjing@ms.xjb.ac.cn
  • 作者简介:许玉凤(1969-),女,山东冠县人,在读博士。E-mail: xuyufeng_159@163.com
  • 基金资助:
    新疆青年千人计划项目(Y371051001)资助

Spatial-temporal change in different vegetation growth of Xinjiang from 1982 to 2013

XU Yu-Feng1, 2, YANG Jing1, *, LI Wei-Hong1, FANG Gong-Huan1, 2, ZHANG Shu-Hua1, 2, DENG Hai-Jun1, 2, DONG Jie3   

  1. 1.State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China;
    2.University of Chinese Academy of Sciences, Beijing 100049, China;
    3.School of Environment and Planning, Liaocheng University, Liaocheng 252000, China
  • Received:2015-02-05 Online:2016-01-20 Published:2016-01-20

摘要: 基于逐像元一元线性回归模型,应用MODIS NDVI数据对AVHRR-GIMMS NDVI 数据进行时间序列拓展,建立了1982-2013年间长时间序列生长季最大NDVI数据集,分析了新疆不同分区的生长季植被NDVI变化及其对气候变化的响应。结果表明,1)北疆平原地区、南疆平原地区和南疆山地地区的植被NDVI变化呈显著增长趋势,北疆山地地区的植被呈下降趋势。2)水分条件和最低气温是影响新疆植被生长的重要因素,但不同分区的影响程度不同。北疆平原地区植被受水分条件影响较大,其中最低气温对农田植被影响较大;南疆平原地区植被受气温和降水的双重作用;山地地区植被受水分条件影响较大。3)从不同植被类型来看,水分条件对草地的影响最大,其次是林地,农田植被受水分条件的限制较小,与灌溉有着直接关系。4)增温增湿的气候条件有利于植被生长;北疆山地地区植被退化趋势受气候变化、火灾、平原草地围栏保护后放牧压力向山地转移等综合因素的影响。

Abstract: Based on a pixel scale linear regression model, we extended Advanced Very High Resolution Radiometer Global Inventory Modeling and Mapping Studies (AVHRR GIMMS) using MODIS normalized difference vegetation index (NDVI) data and constructed a time series of NDVI covering Xinjiang province from 1982 to 2013. We also analyzed the spatial-temporal changes in vegetation growth in different districts and correlated these changes with climate factors. NDVI increased significantly in the plain regions of northern and southern Xinjiang and in the mountainous region of southern Xinjiang, but decreased in the mountainous region of northern Xinjiang. Rainfall and minimum temperature were important factors in vegetation growth in Xinjiang. Vegetation was influenced by rainfall on the northern Xinjiang plain; crop growth was influenced by temperature, especially minimum temperature. On the southern plain vegetation growth was influenced by both rainfall and temperature and in the mountain regions by rainfall. Rainfall played a more important role in grassland compared to forest and cropland areas; rainfall has little influence on cropland because of the use of irrigation. Increasing rainfall and temperature promoted an increase in the NDVI while the degradation of vegetation in mountainous region of northern Xinjiang is influenced by a range of factors including climate change, fire, and the control of grazing pressure by fencing.