| 摘要: |
| 基于2001～2010年全国气象数据及MODIS NDVI数据，利用改进的光能利用率模型（CASA模型）反演了全国植被NPP时空格局，并分析了其与年平均温度及降雨量的关系，结果表明：（1）近10年全国植被平均NPP空间分布地域性明显，总体上北低南高，由西北向东南逐渐增加。其中西北沙漠地区的植被NPP值最小，大都在100gC/m2以下。南方大部分地区植被NPP值在1 000gC/m2以上，特别是广西、广东及海南等省份更是达到了1 500gC/m2以上。（2）近10年全国植被平均NPP总体上呈逐年增加的趋势，倾斜率约为2.82gC/m2·a，即每年每平方米增加的NPP约为2.82gC。相关系数为0.552，未达显著水平。（3）近10年来全国大部分地区的年平均NPP与年平均温度之间呈正相关，这部分地区占所有地区的比例为75.24%。（4）近10年全国绝大部分地区的年平均NPP与降雨量之间呈正相关，这部分地区占所有地区的比例为99.91%，说明降雨量对植被NPP的影响大于年均温。 |
| 关键词: 净初级生产力 时空变化 降雨量 温度 中国 |
| DOI：10.7621/cjarrp.1005-9121.20160904 |
| 分类号: |
| 基金项目: |
|
| SPATIAL AND TEMPORAL CHANGE OF VEGETATION NET PRIMARY PRODUCTIVITY AND ITS RELATIONSHIP WITH CLIMATE FROM 2001 TO 2010 IN CHINA |
|
Zhong Xiaochun1, Chen Wen2, Liu Tao2, Hao Xinning1, Li Zhemin1, Sun Chengming2
|
|
1.Institute of Agriculture Information，Chinese Academy of Agriculture Sciences，Beijing 100081, China;2.Jiangsu Key Laboratory of Crop Genetics and Physiology/Co-Innovation Center for Modern Production Technology of Grain Crops，Yangzhou University，Yangzhou，Jiangsu 225009，China
|
| Abstract: |
| Vegetation net primary productivity（NPP）is an important indicator for global change.Based on meteorological data and MODIS NDVI data during 2001-2010，the spatial and temporal pattern of vegetation NPp in China was simulated using an improved light use efficiency model（CASA model），and the relationships between NPp and climate factors were analyzed.The results showed that：（1）in recent 10 years，the spatial distribution of the mean vegetation NPp of China indicated an obvious zonality，was a gradual increase of the mean NPP from northwest to southeast.The minimum value of vegetation NPP was in the northwest desert，wiht less than 100 gC/m2.The vegetation NPP values in most areas of south China were more than 1000 gC/m2，especially in Guangxi，Guangdong and Hainan provinces，which was more than 1500 gC/m2.a-1.（2）There was an increase trend of mean vegetation NPP year by year over the study period with a rate of 2.82 gC/m2.a-1.The correlation coefficient was 0.552，but it didn′t reach a significant level.（3）There was a positive correlation between the mean annual NPp and mean annual temperature in the most parts of China in recent 10 years，and the area was 75.24%.（4）There was a positive correlation between the mean annual NPp and mean annual precipitation in the vast parts of China in recent 10 years，and the area proportion was 99.91%.This in dicated that the influence of precipitation on the vegetation NPP was greater than the mean annual temperature. |
| Key words: net primary productivity（NPP） spatial and temporal change precipitation temperature China |
