中文摘要：

陆上的碳周期和全球大气的 CO2 预算是在全球气候变化研究的重要 foci。模仿的网陆上的生态系统的主要生产率(NPP ) 为碳周期研究是重要的。在这研究， plant-atmosphere-soil 连续统氮(N) 骑车的模型被开发并且合并了到北方的生态系统生产率模拟器(BEPS ) 模型。与在 1 km 分辨率的确定的数据库(叶区域索引，陆地盖子，每日的气象学数据，植被和土壤)，每天 NPP 印射因为在 2007 的澜沧江山谷被生产，并且 NPP 的空间时间的模式和它对土壤 N 水平的回答的机制进一步被探索。全部的 NPP 和在 2007 的澜沧江山谷的吝啬的 NPP 是 66.5 Tg C 和 416 g

英文摘要：

Terrestrial carbon cycle and the global atmospheric CO2 budget are important foci in global climate change research. Simulating net primary productivity （NPP） of terrestrial ecosystems is important for carbon cycle research. In this study, a plant-atmosphere-soil continuum nitrogen （N） cycling model was developed and incorporated into the Boreal Ecosystem Productivity Simulator （BEPS） model. With the established database （leaf area index, land cover, daily meteorology data, vegetation and soil） at a 1 km resolution, daily maps of NPP for Lantsang valley in 2007 were produced, and the spatial-temporal patterns of NPP and mechanisms of its responses to soil N level were further explored. The total NPP and mean NPP of Lantsang valley in 2007 were 66.5 Tg C and 416 g？m-2？a-1 C, respectively. In addition, statistical analysis of NPP of different land cover types was conducted and investigated. Compared with BEPS model （without considering nitrogen effect）, it was inferred that the plant carbon fixing for the upstream of Lantsang valley was also limited by soil available nitrogen besides temperature and precipitation. However, nitrogen has no evident limitation to NPP accumulation of broadleaf forest, which mainly distributed in the downstream of Lantsang valley.