摘要
运用Kriging插值法和地统计分析,从多个样地尺度对青藏高原东缘高寒地区典型的高寒草甸、高寒灌丛及沙化草地进行了土壤水分的空间异质性分析.结果表明,高寒草甸土壤水分的空间异质性最高;而高寒灌丛的较低;沙化草地的空间异质性受到多方面外界因素的影响而表现出不稳定的态势.高寒草甸的采样误差主要来源于微地形;而高寒灌丛和沙化草地的采样误差则主要来源于植被覆被变化及其带来的水分在空间上的再分配过程.由此可见,在青藏高原东缘高寒地区,不同植被类型在不同空间尺度上所表现出的异质性状况可以为合理有效地控制生态因子提供了重要的科学依据.
The spatial heterogeneity of soil water in alpine meadow, alpine shrub and desert grassland of alpine area in Eastern Qinghai-Tibet Plateau has been analyzed in different plot scales by applying Kriging and geo-statistical methods. The spatial heterogeneity of soil water in alpine meadow is found to be the highest, and that of the soil water in alpine shrub is comparatively low. What is more, the spatial heterogeneity of soil mater in desert grassland shows an unstable trend influenced by many outside factors. The main cause of sampling error in alpine meadow is micro-terrain, but the causes of sampling errors in alpine shrub and desert grassland are the change in plant cover and the spatial partitioning of soil water. The results show that, small scales spatial heterogeneity and control process of soil water in different plant covers provide scientific foundation to control ecological factors effectively in alpine area of Eastern Qinghai-Tibet Plateau.
出处
《武汉大学学报（理学版）》
CAS
CSCD
北大核心
2008年第4期414-420,共7页
Journal of Wuhan University:Natural Science Edition
基金
四川省教育厅重点项目(2006A071)
关键词
土壤
水分
空间异质性
青藏高原东缘
地统计学
soil
water
spatial heterogeneity
Eastern Qinghai-Tibet Plateau
geo-statistics
