贵州喀斯特近30年植被生长特征分析  

The growth characteristics of vegetation in the Karst regions of Guizhou from 1981 to 2012

作　　者：王志伟[1] 王茜[1] 李世歌[1] 王普昶[1] 刘秀峰[1] 谢彩云[1] 史健宗[2] 吴佳海[1] 王小利[1] 陆瑞霞[1] 莫本田[1] 

机构地区：[1]贵州省农业科学院草业研究所,贵州贵阳550006 [2]中国科学院寒区旱区环境与工程研究所青藏高原冰冻圈观测研究站,甘肃兰州730020

出　　处：《草业科学》2016年第11期2180-2188,共9页Pratacultural Science

基　　金：贵州省农业科学院科研项目([2016]贵州省近三十年来植被生长特征分析);贵州省农业科学院专项资金([2016]032号);贵州省科技创新人才团队项目(黔科合平台人才[2016]5617号)

摘　　要：贵州省地处南方喀斯特地区的中心,其生物学过程严重影响到环境变化。植物做为生物圈中的生产者,对陆地生态系统的贡献同样不容忽视。先进型分辨率辐射仪的归一化植被指数AVHRR GIMMS NDVI 3g数据集作为一种有效的植被状况监测工具,可以提供全球范围内从20世纪80年代到21世纪初的资料。本研究使用该数据分析贵州省植被变化状况,发现近30年来贵州省的植被整体上趋于生长增加的情形,其归一化植被指数(NDVI)年增长率为0.002 1。不过,也存在两个植被突变点(turing point,TP),分别出现在1985年和1993年。在月NDVI数据中,各月整体变化率和TP与贵州省全省植被、栽培植物、草地和林地的NDVI变化趋势则明显不同。从空间分布角度分析,贵州省植被增长速度呈明显的东南地区变化速率优于西北地区,全球变暖是其中一方面的原因。同时,降水分布状况也和植被变化状况存在明显的一致性。此外,人类活动对植被变化造成的影响也不容忽视。Guizhou province is located in the center area of Karst region,its ecological environment has been changed by biological process significantly.It is noted that the plants play an important role in the terrestrial ecosystem as the producer of the biosphere.Therefore,the updated Global Inventory Modeling and Mapping Studies（GIMMS）third generation Normalized Difference Vegetation Index（NDVI）dataset by using global satellite Advanced Very High Resolution Radiometer（AVHRR）was used to investigate the changes of vegetation in the Guizhou Province from 1982 to 2011.The results demonstrated that the overall NDVI increased from 1982 to 2011with an average rate of 0.002 1per year（P〈0.001）.However,there still were two turning points（TP）in 1985 and 1993,respectively.There are large variations between the NDVI trend and TPs in the whole area and in different vegetation types.From the spatial distribution of vegetation growth in Guizhou,the rate of vegetation increased in southeastern was superior to northwestern obviously.One reason was global warming,and meanwhile the vegetation change consisitent with the spatial distribution of precipitation.In addition,the impact of human activities on the changes of vegetation should be paid more attentions.

关 键 词：植被 NDVI 喀斯特 石漠化 草地 

分 类 号：Q948[生物学—植物学]