单 位：
农业部农业信息获取技术重点实验室;中国农业大学信息与电气工程学院
关键词：
中国北方农牧交错带;归一化植被指数;总初级生产力;气象因子;相关系数法
摘 要：
研究了2001—2013年我国北方农牧交错带内表征植被生态特征的归一化差值植被指数(NDVI)、总初级生产力(GPP)时空变化规律,分析了研究区该时间段内的温度、降水量变化特征,利用Pearson相关系数法分析了不同植被类型对气象因子的响应规律。结果显示:研究区内生长季的植被生态状况与温度呈负相关、与降水量呈正相关;非生长季的植被生态状况则相反,其生态状况与温度呈正相关、与降水量呈负相关。这是因为生长季温度高于最适温度会抑制增长,而干旱地带的降水会促进植被生长;而非生长季气温较低,温度的增加会对植被有明显的促进作用,而降水量并不是影响植被生态状况的主要因素,植被对其响应也并不明显。
译 名：
Responses of Vegetation to Change of Meteorological Factors in Agricultural-Pastoral Area of Northern China
作 者：
Su Wei;Liu Xiaoxuan;Luo Qian;Chang Shuqi;Zhang Xiaodong;Key Laboratory of Agricultural Information Acquisition Technology,Ministry of Agriculture;College of Information and Electrical Engineering,China Agricultural University;
关键词：
Agricultural-pastoral area of Northern China Normalized differential vegetation index Gross primary productivity Meteorological factors Correlation coefficient method
摘 要：
Agricultural-pastoral area of Northern China is a ecologically fragile belt. Climate change has increased the risk of ecological vulnerability in this region. Besides, it has made the ecological vulnerability more serious because of the pattern of alternant farming and animal husbandry. Therefore,the aim of this paper was to study the responses of vegetation to the change of meteorological factors in agricultural-pastoral areas of Northern China during 2001—2013,using correlation analysis method.First,temporal and spatial variation rules of vegetation growing were explored based on NDVI( Normalized differential vegetation index) and GPP( Gross primary productivity) data. Then,variation rules of temperature and precipitation were found. Finally,we analyzed the responses of vegetation to the change of meteorological factors of different vegetation types using Pearson correlation coefficient method.The results showed that in the research area,vegetation ecological situation was negatively correlated with temperature and positively correlated with precipitation in growing season,while the correlations were on the contrast in non-growing season. The vegetation ecological situation was positively correlated with temperature and negatively correlated with precipitation. Because the higher temperature will inhibit the vegetation growth than the optimum temperature,while the precipitation in semi-arid area could promote the growth of vegetation. However,temperature was very low in non-growing season,so the increase in temperature promotes vegetation ecological situation obviously and the response of vegetation to precipitation was not obvious because precipitation was not the main factor influencing the vegetation ecological situation in this period.
