Plant net primary production (NPP) of agriculture vegetation represents the capacity of sequestrating atmospheric CO2 in agro-ecosystem, and plays an important role in terrestrial carbon cycling.
农业植被净初级生产力代表了农田生态系统固定大气co_2的能力，是陆地生态系统碳循环的重要组成部分。
The grassland net primary production (NPP) is an important research issue in the global climate change and terrestrial ecosystem.
草地净第一性生产力(NPP)是全球变化与陆地生态系统研究的核心内容之一。
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