Phosphorus (p) is one of the main limiting nutrients to the plant growth and net primary productivity (NPP) in terrestrial ecosystem.

磷元素是陆地植物生长和生态系统净初级生产力的主要限制因子之一。

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Annual net primary productivity (NPP) of terrestrial vegetation is the net amount of carbon fixed by plant photosynthesis. NPP is an important index in global change ecology.

植被的净第一性生产力(NPP)反映了植物每年通过光合作用所固定的碳总量，目前NPP研究是全球变化研究的重要内容之一。

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