水科学进展2012，Vol.23Issue(3)：310-316,7.
黄土高原区域尺度土壤水分空间变异性
Spatial variability of soil moisture at a regional scale in the Loess Plateau
摘要
Abstract
Soil moisture (SM) is one of the key factors for plant growth and eco-environment reconstruction on the Loess Plateau of China. To ascertain the spatial variability of SM in deep soil layers at a regional scale, 234 sampling sites were located with a GPS receiver, and 12 198 soil samples were collected with a soil auger before the rainy season in 2008. The distribution and variation characteristics of SM were evaluated by using classic statistical and geosta-tistical methods. Results showed that ① SM decreased gradually from southeast to northwest in the horizontal direction, while in vertical direction, SM decreased from 0 to 90 cm and then increased from 90 to 500 cm soil depth. ② Land use had a significant impact on the amount and profile distribution of SM. ③ The coefficients of variation and nugget ratios of SM at different depths in 0 - 500 cm profile demonstrated a decreasing-increasing trend, and these indices showed a good consistency in expressing the variation of SM. Understanding this information is beneficial to the management/mediation of soil and water processes, and to the restoration of eco-environment on the Loess Plateau.关键词
空间变异性/土地利用/地统计学/土壤含水率/黄土高原地区Key words
spatial variability/ land use/ geostatistics/ soil water content/ the Loess Plateau region分类
农业科技引用本文复制引用
王云强,邵明安,刘志鹏..黄土高原区域尺度土壤水分空间变异性[J].水科学进展,2012,23(3):310-316,7.基金项目
国家自然科学基金资助项目(41071156 （）
41101204) （）
