草甸生态系统水源涵养服务功能的时空异质性  

Spatial and Temporal Heterogeneity of Water Conservation Service for Meadow Ecosystem

作　　者：李士美[1] 谢高地[2] 

机构地区：[1]青岛农业大学园林与林学院,山东青岛266109 [2]中国科学院地理科学与资源研究所,北京100101

出　　处：《中国草地学报》2015年第2期88-93,共6页Chinese Journal of Grassland

基　　金：国家自然科学基金项目"基于CERN的典型生态系统服务流量过程曲线研究"(30770410);山东省高校科技发展计划项目(J14LF04);青岛农业大学高层次人才科研基金项目(631322)资助

摘　　要：基于土壤水分动态监测数据,研究分析了青海海北高寒草甸生态系统定位研究站矮嵩草草甸、金露梅灌丛的有效水源涵养服务、潜在水源涵养服务和剩余水源涵养服务的时空异质性.矮嵩草草甸0～40 cm土层的平均有效水源涵养量、潜在水源涵养量和剩余水源涵养量分别为108.8mm、204.8mm和566.3mm,而金露梅灌丛则分别为227.7 mm、328.0mm和641.4mm.不同层次的土壤有效水源涵养量、潜在水源涵养量、剩余水源涵养量存在显著的差异性,且具有显著的季节变化特征.线性回归分析结果表明,矮嵩草草甸0～40cm水源涵养量与10～20cm水源涵养量的相关性最为显著,而金露梅灌丛则与30～40 cm土层的水源涵养量相关性最强.Based on the dynamic monitoring data of soil water, the spatial and temporal heterogeneity of effective water conservation, potential water conservation and surplus water conservation in Haibei Al- pine Meadow Ecosystem Research Station were analyzed. The amount of effective water conservation, potential water conservation and surplus in Kobresia hurnilis meadow water conservation was 108. 8 mm, 204.8 mm and 566.3 mm , respectively, while that in Potentilla fruticosa shrub was 227.7 ram, 328.0 mm and 641.4 ram, respectively. There was significant spatial and temporal variation in effective water conservation, potential water conservation and surplus water conservation. Linear regression analysis results showed that the water conservation service between 0-40 cm soil layer and 10-20 cm soil layer was most significant, while that of Potentilla fruticosa shrub was most relevant to 30-40 cm soil layer.

关 键 词：矮嵩草草甸 金露梅灌丛 水源涵养 土壤水分 时空异质性 

分 类 号：S154.4[农业科学—土壤学]