Abstract: In order to evaluate the effects of the climate of spring 2020 on nationwide grassland ecosystem,using the meteorological and remote sensing data obtained by CAgMSS and MODIS systems,we analyzed the influence of meteorological factors including temperature and precipitation on grass production and vegetation quality of the grassland in China. The results showed that,except for the southeast of Inner Mongolia,southwest of Xinjiang and south central of North China where the temperature and precipitation were suitable for grassland growth,most meadow areas of China had high temperature but low precipitation,which impaired grass reviving and growth. The comprehensive estimation results showed that,the most part of grassland in China grew worse than that in last year,especially in the northern part of Xinjiang,the grass yield was 30%~50% less.

Key words: Meteorological condition, Growth of grass, Grass yield

摘要： 为评估2020年春季气象条件对全国草地生态系统的影响，本文利用国家气象中心CAgMSS系统的气象数据以及MODIS遥感数据分析了2020年春季全国气温、降水等气象要素对草地生态系统产草量、植被质量等的影响。结果表明：2020年春季除内蒙古东南部、新疆西南部、华北中南部等地水热条件相对较好外，全国大部草原区气温正常偏高、降水偏少，水热匹配较差，不利于牧草返青和生长。草原生态气象模型综合估算结果表明：全国大部草原区牧草2020年春季长势差于2019年同期，尤其新疆北部大部地区产草量减少30%～50%。

关键词: 气象条件, 牧草长势, 牧草产量