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Position: Home > Articles > Estimation of Chinese grassland productivity using remote sensing Transactions of the Chinese Society of Agricultural Engineering 2008,24 (1) 208-212

基于遥感的中国草地生产力初步计算

作  者:
陈世荣;王世新;周艺
单  位:
中国科学院遥感应用研究所
关键词:
遥感;草地生产力;净初级生产力(NPP);MODIS数据
摘  要:
草地生产力研究对于评估草地生态系统食物供给具有重要意义。在基于MODIS的2001年1 km中国陆地生态系统土地覆盖类型产品和植被净初级生产力(NPP)产品,运用各种草地生产力计算模型,初步计算了当年中国各草地生产力指标。计算得到:2001年,中国草地生态系统产干草1.44亿t,理论载畜量为1.08亿个羊单位,潜在食物供给为羊肉308.92万t。结果表明,基于遥感的草地生产力计算方法机理性较强,现势性好,可在较短时间内获取大范围年度草地生产力指标,其计算结果较为符合中国草地生产力的实际分布情况。
译  名:
Estimation of Chinese grassland productivity using remote sensing
作  者:
Chen Shirong1,2,Wang Shixin1,Zhou Yi1(1.Institute of Remote Sensing Applications,Chinese Academy of Sciences,Beijing 100101,China;2.National Disaster Reduction Center of China,Beijing 100053,China)
关键词:
remote sensing;grassland productivity;NPP;MODIS data
摘  要:
It is important to study grassland productivity for evaluating the food supply of the grassland ecosystem.Based on a 1 km Chinese land cover product and a 1 km Chinese vegetation NPP product of the year 2001 using MODIS data,the authors use several grassland productivity evaluating models to calculate some Chinese grassland productivity indexes of the year 2001.The results indicate that in 2001,Chinese dry grass yield is about 144 million tons,theoretic stock carrying capability is about 108 million sheep units,potential food supply ability is about 3089.2 thousand tons of sheep meat.The method for calculating grassland productivity using remote sensing has good mechanism and timeliness,can achieve yearly grassland productivity indexes of large area in short time,and the results match the actual distribution of Chinese grassland productivity well.

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