The Hulunbeier region is an area very sensitive to global climate change. It is, therefore, of great scientific significance to study spatial and temporal distribution of vegetation NPP of that region. Based on the satellite remote sensing data and meteorological data available and with the aid of a modified light utilization rate model, analysis was made of effects of meteorological factors on the distribution in Hulunbeier. Results show that the average NPP per unit area of the past 29 years was the highest in the Daxinganling forest region, being mostly over 450 g · m and the lowest in the Hulunbeier Steppe, varying for years in the range of 0 -350 g · m-2 and moderate in other areas of Hulunbeier between the forest and the steppe, varying for years in the range of > 350 - 450 g · m-2 . As affected by the warming and drying climate , the distribution of NPP at the pixel scale varied sharply from area to area in the region. With declining precipitation and rising temperature, the NPP per unit area of the Hulunbeier Steppe displayed a descending trend, which was getting more and more significant towards the west. With rising temperature, the NPP per unit area of the northern portion of the forest area tended to increase slightly, while that of the southern portion went the other way around, and that of the farming-pastoral ecotone to the east of the Daxinganling Mountains also showed a declining trend.%利用遥感和气象资料,基于Arcmap软件平台和改进的光能利用率模型,研究1982-2010年呼伦贝尔市植被净初级生产力(NPP)格局和动态,分析气候因素对其时空格局的影响.29 a的单位面积NPP均值分析表明,大兴安岭林区NPP明显较高,单位面积NPP多大于450 g·m-2(以C计,下同)；呼伦贝尔草原较低,单位面积NPP多年均值为0～350g·m-2;岭西林草交错区和岭东农牧交错区介于林区和草原区之间,单位面积NPP多年均值为＞350 ～450 g· m-2.在气候暖干化背景下,呼伦贝尔境内像元尺度的NPP格局动态变化区域差异明显.随降水量下降和气温升高,呼伦贝尔草原区单位面积NPP呈下降趋势,且越向西部下降趋势越明显；随气温升高,大兴安岭林区北部单位面积NPP呈弱增长趋势,而南部林区为弱下降趋势；大兴安岭东部农林交错区单位面积NPP也呈弱下降趋势.
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