Title: Characteristic of Soil Moisture and Salinity Distribution in Eight Forests and Its Relationship with Groundwater in Exetreme Arid Area
Abstract: By two years of groundwater data and soil moisture and salinity of eight forests in Kalamiji oasis,soil moisture and salinity of filt,sandy and clay distributed in 0-150 cm of eight forest was analyzed,the results showed that:(1) The trend of soil moisture following soil depth was: wave crestand troughof soil moisture in sandy forest turn on alternately from 60cm;the soil moisture in filt forest increased gradrally following the soil depth in filt forest;in clay forest the soil moisture increased gradrally at the beginning,up to 80-120 cm,the soil moisture do not increase any more even decrease.(2) The soil moisture was small and the spatial heterogeneity was large in sandy forests,the soil moisture was large and the spatial heterogeneity was small in clay forests.The salinity was higher in clay forest than in sandy forests,with EC within 2.5 mS/cm and 1.5 mS/cm respectively.(3) In eight forests of Kalamiji oasis,the soil content was higher in which has higher salinity,and the soil moisture was lower in which has the lower salinity.(4) The changing trend of soil moisture and salinity following groundwater table was: the soil moisture increasing gradually following the raising groundwater table approximately within 0-150 cm,there is remarkable relativity between soil moisture of the forest and groundwater table(R2=-0.81).Soil salinity feature expressed: salinity of each layer(20 cm can be one layer) decrease following the groundwate table increase in(sandy) loam soil,that is to say,when ground water higher,salinity larger,when ground water table lower,salinity small;in clay,salt is moving quickly at the impact of strong power of mini-tube,turn out to be the phenomenon,when groundwater lable higher,salinity larger,especially embodied in underlayer(80-100 cm,100-120 cm and 120-150 cm),namely salinity increase following the uplift of the groundwater table.
Publication Year: 2010
Publication Date: 2010-01-01
Language: en
Type: article
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