影响草原生态环境容量主要因子的主成分分析

Principal Component Analysis on the Main Factors Affecting the Grassland Eco-environment Capacity

草原地区的环境容量不仅是维系草原生态平衡的关键问题,也是影响区域经济社会长远发展至关重要的因素。以地处我国北方干旱半干旱地区、生态环境相对脆弱的内蒙古包头市达茂旗为例,在构建草原生态环境容量评价指标体系的基础上,采用主成分分析法,分析了影响草原生态环境容量的主要因子。结果表明,依据各指标的贡献率,第一产业总产值、总人口数、草地围封面积、人均可利用草地面积、国内生产总值和可利用草地面积是草原生态环境容量评价中贡献率比较大的因子,是影响草原生态环境容量的重要因素。

The environment capacity not only is important to maintain the balance of nature,but also influences the socio-economic development in grassland regions.Take the case of Damao Banner in Inner Mongolia located at the arid and semi-arid region in northern China with a fragile ecosystem,the index system of grassland ecology environment capacity was constructed and then the main factors influencing the grassland ecology environment capacity were analyzed by a principal component analysis.The result showed that the indexes of gross product of primary industry,total population,the area of enclosure grassland,per capita area of utilizable grassland,gross domestic product and the area of utilizable grassland were the factors influencing and having larger contribution to the grassland ecology environment capacity.