北京林业大学学报2018，Vol.40Issue(3)：84-92,9.DOI:10.13332/j.1000-1522.20170337
陕北黄土区不同微地形土壤水分变化趋势分析
Dynamic changing trend of soil moisture in different micro-topography in loess region of northern Shaanxi Province of northwestern China
摘要
Abstract
[ Objective ] In the Loess Plateau of northern China, rainfall is the main source of soil moisture due to limited amount of precipitation and strong evaporation. In the loess hillslope, rainfall would be reallocated depending on microtopography, that would affect soil water variation. Therefore, our study aimed to analyze the dynamics of soil moisture in different microtopography types, which can provide reference for the vegetation growth and restoration. [ Method] In this paper, soil moisture in the five microtopography types, e. g. platform, collapse, scarp, gully and shallow gully, was investigated in sunny slope of Hegou Catchment of Wuqi County, Shaanxi Province of northern China from August 2010 to June 2013. The self-correlation test, Mann-Kendall trend test, linear regression methods, etc. , were used in this study. [ Result] During the whole year and the growing season in the investigation period, the soil moisture content of microtopography increased with the increasing depth. Among them, the soil moisture content in the gully was relatively high, and in the scarp was the lowest. There was a significantly positive autocorrelation between soil moisture in each soil layers. The dynamics of soil moisture in the five micro-topography types during the investigation period was not significant. The soil moisture in each soil layer in the collapse had a slightly increasing trend, however, the soil moisture in other four microtopography types increased or decreased in each soil layer. The differences in changing rate of five microtopography types were also observed. [ Conclusion ] Overall, during the monitoring period, among the five microtopography types, the soil moisture content in the gully was the highest, but the increasing rate of collapse was quicker.关键词
土壤水分/微地形/Mann-Kendall趋势检验/黄土/陕北Key words
soil moisture/microtopography/Mann-Kendall trend test/loess/northern Shaanxi Province分类
农业科技引用本文复制引用
申明爽,朱清科,王瑜,梅雪梅,苟清平,刘昱言..陕北黄土区不同微地形土壤水分变化趋势分析[J].北京林业大学学报,2018,40(3):84-92,9.基金项目
"十三五"国家科技支撑计划课题(2015BAD07B02). （2015BAD07B02）
