农业工程学报2011，Vol.27Issue(7)：45-50,6.DOI:10.3969/j.issn.1002-6819.2011.07.008
黄土高原雨养区坡面土壤蓄水量时间稳定性
Temporal stability of soil water storage on slope in rain-fed region of Loess Plateau
摘要
Abstract
The analysis of temporal stability of soil water storage (SWS) is a theoretical basis for the accurate prediction of the soil moisture which can provide help for the vegetation restoration and reconstruction. The profile SWS on a slope was obtained by neutron probe from October 2005 to September 2006 in Liudaogou watershed on rain-fed region of Loess Plateau. The temporal stability of the SWS was conducted by classical statistical and temporal stability analysis. The results showed that SWS in the different months had moderate variability. The coefficients of variation of SWS under dry condition were lower than that under wet condition. The cumulative frequency of 0-4 m SWS changed less than that of the other depths. The mean relative differences of the 0-4 m SWS ranged from -39% to 53% with lower standard deviation (5.6%). The 0-4 m SWS had higher spearman rank correlation coefficients up to 0.8 with significant correlation. The results of the temporal stability preliminarily determined the representative sites. The spearman rank correlation coefficients were small when the SWS varied greatly, but increased when the SWS remained more or less stable. The spearman rank correlation coefficients can provide a convenient way to estimate the temporal stability of SWS in the study area.关键词
土壤/水分/试验/黄土高原雨养区/土壤蓄水量/时间稳定性Key words
soil/moisture/experiments/rain-fed region of Loess Plateau/soil water storage/temporal stability分类
农业科技引用本文复制引用
白一茹,邵明安..黄土高原雨养区坡面土壤蓄水量时间稳定性[J].农业工程学报,2011,27(7):45-50,6.基金项目
教育部长江学者创新团队项目(IRT0749) （IRT0749）
西北农林科技大学学科带头人支持计划(土壤学) （土壤学）
