摘要
中蒙两国草原区域毗邻,但受气候变化、国家有关草原管理政策以及社会因素等影响,两国生态环境质量存在着一定的差异。本文基于1982-2015年中蒙两国中部边界草原区域植被动态以及同一区域气候变化数据,探究影响中蒙两国生态环境差异的主要驱动因子。结果表明:中蒙中部边界草原区域年际NDVI均值增长趋势达到极显著水平(P<0.01)。1982-2015年中国的NDVI值均高于蒙古国。夏季、春季和冬季NDVI均呈增长趋势,秋季NDVI呈降低趋势,其中最大值出现在夏季,最小值出现在冬季,两国草原区域NDVI趋势波动相似。1989-2018年间中蒙中部边界草原区域年均气温均呈增长趋势,中国变化幅度高于蒙古国。两国研究区最高年平均气温分别为中国7.4℃、蒙古国6.9℃;中国年极端最高气温和年极端最低气温均高于蒙古国,变化幅度中国高于蒙古国。气温与NDVI变化具有显著正相关关系。1989-2018年中蒙中部边界草原区域年均降水量呈增长趋势,中国的多年平均降水量高于蒙古国,两国趋势变化速率中国高于蒙古国。中蒙中部边界草原区域降水量均与NDVI变化呈极显著正相关关系。降水量对中蒙中部边界草原区域NDVI的影响大于气温,是NDVI变化的主要影响因子。1982-2015年中蒙中部边界草原区域NDVI总体增长趋势显著,草原覆盖状况改善明显。
Grassland areas of China and Mongolia are adjacent to each other,but there are some differences in ecological environment quality between the two countries,which may be affected by climate change,national grassland management policies and social factors.Based on the vegetation dynamics and climate change data of the grassland area in the central boundary of China and Mongolia from 1982 to 2015,this paper explored the main driving factors affecting the differences in ecological environment between China and Mongolia.The results showed that the mean annual NDVI increased significantly in the grassland regions(P<0.01).From 1982 to 2015,the NDVI value in China was higher than that in Mongolia.NDVI increased in summer,spring and winter,and decreased in autumn.The maximum mean value appeared in summer and the minimum value appeared in winter.There was similar NDVI trend fluctuation of grassland areas in China and Mongolia.From 1989 to 2018,the average annual temperature in the grassland area of the central boundary of China and Mongolia showed an increasing trend,and the variation range in China was higher than that in Mongolia.The maximum annual average temperature was 7.4℃in China and 6.9℃in Mongolia.Both annual extreme maximum temperature and annual extreme minimum temperature in China were higher than those in Mongolia,and the variation range was higher in China than that in Mongolia.There was a significant positive correlation between air temperature and NDVI.From 1989 to 2018,the average annual precipitation in grassland area of China and Mongolia showe an increasing trend.The average annual precipitation in China was higher than that in Mongolia,and the trend change rate in China was higher than that in Mongolia.There was a significant positive correlation between precipitation and NDVI change in the studying grassland area of China and Mongolia.Precipitation had a greater impact on NDVI than air temperature,which was the main influencing factor of NDVI change.From 1982 to 2015,the overall growth trend of NDVI in the central boundary of China and Monoglia was significant,and the grassland coverage improved significantly.
作者
萨日盖
马秀枝
韩晓荣
梁蕾
朝宝
李小梅
刘爱业
Sarigai;MA Xiu-zhi;HAN Xiao-rong;LIANG Lei;Chaobao;LI Xiao-mei;LIU Ai-ye(Forestry College of Inner Mongolia Agricultural University,Hohhot 010019,China;Urad Front Banner Bureau of Agriculture,Animal Husbandry,Science and Technology,Inner Mongolia,Urad Front Banner 014400,China)
出处
《内蒙古林业科技》
2022年第2期47-54,共8页
Journal of Inner Mongolia Forestry Science and Technology
基金
内蒙古自治区研究生科研创新项目(B20210167Z)。
关键词
中国
蒙古国
边境草原区
气候变化
植被指数
China
Mongolia
border grassland area
climate change
vegetation index
