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中文摘要：
为明确我国南方植被生产力的变化情况,利用2000-2011年的MODIS产品以及气候数据,通过空间拼接与重采样等处理,提取了我国南方近12年的植被净初级生产力（NPP）数据。结果表明：植被覆盖了我国南方97.8%左右的土地。在近12年里,中国南方年均植被NPP变化范围为598.80-673.07g·m^-2,12年平均值为639.30g·m^-2,最小值出现在2000年,最大值出现在2002年。利用Pearson相关系数计算了我国南方年平均植被NPP与时间、年平均温度以及年降雨之间的线性变化趋势,研究表明,我国南方大部分地区的植被NPP在近12年内呈增加的趋势;我国南方大部分地区的植被NPP与温度之间呈正相关,且较多地区相关性达到了显著或极显著水平;我国南方超过一半地区的植被NPP与降雨之间呈负相关。说明我国南方植被NPP空间分布不均且受温度及降水的影响较大。
英文摘要：
In order to define the changes of the vegetation productivity in our country,net primary productivity（NPP）data of the vegetation in past 12 years of southern China was extracted based on the MODIS production and climate data from 2000 to 2011by using space splicing and resampling treatment.The results showed that the 97.8% of the land in southern China was covered by vegetation.From 2000 to 2011,the value of vegetation NPP changed from 598.80to673.07g·m^-2,and the average NPP was 639.30g·m^-2.The value in 2000 reached the minimum and the value in 2002 reached the maximum.Linear trend between the average annual vegetation NPP and time was calculated by Pearson correlation coefficient.And it showed that,the vegetation NPP was increasing in most areas of southern China.The vegetation NPP was positively correlated with the temperature in past 12 years in most parts of southern China.And many areas reached the significant or extremely significant correlation level.The vegetation NPP was negatively correlated with the precipitation in more than half regions of southern China.The above results showed that the spatial distribution of vegetation NPP was uneven in southern China and strongly influenced by temperature and precipitation.
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