中国水土保持科学2012，Vol.10Issue(4)：60-65,6.
黄土区退耕草地小尺度土壤水分空间异质性
Soil water content heterogeneity at small-scale on degraded grasslands on Loess Plateau
摘要
Abstract
In order to explore the heterogeneity of topsoil water content (SM) of regressed grasslands at small-scale, three regressed grasslands in water-wind erosion crisscross region on Loess Plateau were selected. By using high sampling-density and high frequency sampling methods at three sampling transects, we explored the heterogeneity of topsoil water content when the surface soil was in dry and moist conditions and different sampling spaces at small-scale. Results showed that the heterogeneity of topsoil water content of different regressed grasslands followed a sequence of 12 a > 20 a >5 a and it presented medium variation when topsoil was dry. Topsoil water content was positively correlated with its variance value, that is the variance of SM increased with SM increase. Spatial continuity of SM followed a sequence of 12 a regressed grassland > 20 a regressed grassland > 5 a regressed grassland and it was negatively correlated with topsoil water content. At different sampling spaces at small-scale, the variation intensity of topsoil water content under different regressed grasslands had no change whenever the topsoil was dry or moist. This information may provide scientific proofs for water reasonable utilization and vegetation restoration on the Loess Plateau.关键词
小尺度/退耕草地/土壤含水率/空间异质性/水蚀风蚀交错带Key words
small-scale / regressed grassland / soil water content / spatial variability / water-wind erosion crisscross region引用本文复制引用
刘丙霞,邵明安..黄土区退耕草地小尺度土壤水分空间异质性[J].中国水土保持科学,2012,10(4):60-65,6.基金项目
国家自然科学基金项目“土壤水分植被承载力模拟研究”(E090103) （E090103）
教育部创新团队项目“黄土高原流域生态系统中水土迁移机制及其调控机理”(IRT0749) （IRT0749）
