Increasied annual precipitations have played a positive role to improve Natural vegetation NPP.
年降水量的增加对提高自然植被净第一性生产力具有积极作用。
Based on the natural vegetation NPP model Zhou Guangsheng and Zhang Xinshi, the space-time changing trend of natural vegetation NPP in Urumqi area in the last 30 years was estimated.
利用周广胜、张新时提出的自然植被净第一性生产力模型，估算分析了乌鲁木齐地区近30年自然植被净第一性生产力(NPP)的时空变化。
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