水土保持学报2012，Vol.26Issue(1)：251-254,258,5.
科尔沁地区不同类型沙地土壤水分的时空异质性
Spatio-temporal Variability of Soil Moisture in Different Dunes of Horqin Sandy Land
摘要
Abstract
Based on the observed data of soil moisture in growing season from 2006 to 2010,the spatio-temporal variability of soil water moisture in farmland,sandy grassland and fixed sand dune in Horqin sandy land was analized.From 2006 to 2010,the results showed that：（1）Soil moisture of the three sites was getting the highest in July;for farmland,the soil moisture in July was significantly different from that in May and June,and that of the sandy grassland in July was significantly different from that in August and September,at fixed sand dunes,its soil moisture in July was significantly different from that in other months of growing season;（2）Soil moisture showed a gradually increasing trend;（3）The average of soil moisture in farmland,sandy grassland and fixed sand dune were 20.69%,7.63% and 3.61%,respectively;（4）The general trend of soil moisture with increasing soil depth was firstly increased,and then decreased,and finally increased again.Soil moisture of farmland at 0-20 cm was significantly different from that at 20-40 cm,40-60 cm,120-140 cm and 140-160 cm;for the sandy grassland,soil moisture was significantly different from that at 0-20 cm and 140-160 cm;for the fixed sand dune,the soil moisture was significantly different from that at 100-120 cm and 140-160 cm;（5）The seasonal distribution of precipitation in study area was very uneven,the rainfall in April to October accounted for 92.58%;0～5 mm rainfall events accounted for 73.29%,but its rainfall only occupied 25.1%;the interval of rainfall in 0～10 d accounting for 37.6% of period without rainfall;and 0～10 d interval had the highest frequency,which accounted for 86.9%;（6）When soil moisture was higher,the variation was decreased with increasing moisture,and when soil moisture was lower,the variation was increased with moisture increase.关键词
土壤水分/时空变异/半干旱区/科尔沁沙地Key words
soil moisture/spatio-temporal variability/semi-arid region/Horqin sandy land分类
农业科技引用本文复制引用
姚淑霞,张铜会,赵传成,刘新平..科尔沁地区不同类型沙地土壤水分的时空异质性[J].水土保持学报,2012,26(1):251-254,258,5.基金项目
国家重点基础研究发展计划“973”计划项目 （）
半干旱沙地沙丘地下水补给功能比较研究项目 （）
国家自然科学基金项目 （）
中国科学院西部之光西部博士项目 （）
