| 近10年甘南牧区草地净初级生产力变化研究 |
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| 引用本文： | 杨东辉,赵军,张智慧,付鹏,刘春雨.近10年甘南牧区草地净初级生产力变化研究[J].干旱地区农业研究,2011,29(1):257-263. |
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| 作者姓名： | 杨东辉 赵军 张智慧 付鹏 刘春雨 |
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| 作者单位： | 西北师范大学地理与环境科学学院;中科院寒区旱区环境与工程研究所; |
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| 基金项目： | 国家自然科学基金项目(40961026); 甘肃省自然科学基金项目(0803RJZA088) |
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| 摘 要： | 以改进的CASA模型为基础,结合MODIS NDVI数据、气象资料,估算了甘南牧区草地2000、2005、2008年牧草生长旺季7月净初级生产力,并分析了其时空动态.结果显示:(1)甘南牧区草地净初级生产力(NPP)的空间分布基本格局是西南偏西和东北两区域最低,然后由西南-东北方向为轴心逐渐向内陆中心部分递增,该分布规...
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| 关 键 词： | 改进CASA模型 植被净初级生产力 甘南牧区 |
Research on changes of net primary productivity of grassland vegetation in Gannan pastoral area over the past 10 years |
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| YANG Donghui,ZHAO Jun,ZHANG Zhihui,FU Peng,LIU Chunyu.Research on changes of net primary productivity of grassland vegetation in Gannan pastoral area over the past 10 years[J].Agricultural Research in the Arid Areas,2011,29(1):257-263. |
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| Authors: | YANG Donghui ZHAO Jun ZHANG Zhihui FU Peng LIU Chunyu |
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| Institution: | YANG Dong-hui1,ZHAO Jun1,ZHANG Zhi-hui2,FU Peng1,LIU Chun-yu1(1.College of Geographic and Environmental Science,Northwest Normal University,Lanzhou,Gansu 730070,China,2.Institute of Cold and Arid Regions Environmental and Engineering,Chinese Academy of Sciences,Gansu 730000,China) |
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| Abstract: | An improved CASA model with MODIS NDVI along with meteorological data was used to estimate the net primary productivity(NPP) of grassland vegetation in pasture season in July each year in 2000,2005 and 2008,and to analyse its spatial and temporal dynamics.The results showed that:(1) The fundamental spatial pattern of annual NPP in Gannan pastoral was characterized by low NPP levels distributed in the west-southwest and northwest corners,then the NPP levels increased gradually from the two corners into the a... |
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| Keywords: | improved CASA model change of grassland NPP correlation Gannan pastoral area |
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