基于3S技术的河北省山区植被净初级生产力估算及空间格局研究

植被净初级生产力是国际地圈—生物圈计划（IGBP）、全球变化与陆地生态系统（GCTE）以及京都协定的核心研究内容之一。以GIS为主要技术手段，借助CASA模型计算出河北省山区NPP，分析了山区NPP的空间格局，并对森林、草原的NPP分布情况进行了统计分析，对引起这种变化的主要因子进行了初步探讨，评价分析模型的不确定性。结果表明:（1）河北省山区2012年植被NPP总量为24 746.51 kt/a，平均值为744.1 g/（m²·a）；从整体上看，植被NPP主要分布在境内燕山山脉，太行山山脉呈带状分布，其它地区零星分布。（2）河北省山区NPP值差异显著，由森林、草原、灌丛依次递减。（3）NPP空间分布与气温和降水的空间分布有一定的相关性。研究结果为河北省山区生态系统结构功能协调性、生态承载力、生态服务功能等后续研究奠定基础，为山区社会经济和生态环境可持续发展提供科学依据。

Study on Estimation and Spatial Pattern of Vegetation Net Primary Productivity in Mountainous Area of Hebei Province Based on 3S

Net primary productivity is the core research filed of the international geosphere-Biosphere Programme (IGBP), the Global Change and Terrestrial Ecosystems (GCTE) as well as the Kyoto Protocol. Taking GIS as the main technical means, based on the theory of CASA model, NPP of mountain in Hebei province was calculated and analysis on distribution of vegetation NPP and the distribution of forest and grassland NPP has been carried out. The statistical analysis,on main factor causing this change, the preliminary discussion, analysis and evaluation model of the uncertainty have been carried. The results show that:(1) in mountain of Hebei Province in 2012, the amount of vegetation NPP was 24 746.51 kt/a, with a mean of 744.1 g/(m²·a), on the whole, vegetation NPP mainly distributed in the Yanshan Mountains, it distributed as the band pattern in the Taihang Mountains, and it scattered in other areas; (2) the NPPs are significantly different, which decrease in the order of forests > grasslands > shrub land; (3) spatial distribution of NPP and temperature and spatial distribution of precipitation has certain correlation, only in the case of appropriate hydrothermal conditions and NPP value maximum. Research results can lay the foundation for the mountainou ecosystem structure and function coordination, ecological carrying capacity, ecological service function and other follow-up in Hebei Province, and provide scientific basis for the mountainou social economy and ecological environment sustainable development.