| Studies on the spatio-temporal variation regularity of soil water in MuUs sandy land in north Shaanxi Province |
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| DOI：10.7606/j.issn.1000-7601.2009.02.46 |
| Key Words: MuUs sandy land sandy land type soil water spatio-temporal variability |
| Author Name | Affiliation | | SUN Jianhua | College of Resources and Environment Northwest A＆F University,Yangling,Shaanxi 712100,China | | LIU Jianjun | College of Forestry Northwest A＆F University,Yangling,Shaanxi 712100,China | | KANG Bowen | College of Forestry Northwest A＆F University,Yangling,Shaanxi 712100,China | | HUANG Hai | College of Resources and Environment Northwest A＆F University,Yangling,Shaanxi 712100,China | | SUN Shanghua | College of Resources and Environment Northwest A＆F University,Yangling,Shaanxi 712100,China |
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| Abstract: |
| Long-term dynamic observation was made to monitor the soil water of mobile sand dune, fixed dune and half-fixed dune in MuUs sandy region.The results of the study showed that: the soil water content of different types of sandy land was in the order: mobile sand dune (8.47%) > half-fixed sand dune (8.40%) > fixed sand dune (8.39%) .The distribution of soil water of sandy land was different with the change of soil depth, they all showed the same trend that the soil water content increased at first and then decreased with the increasing of soil depth.In 0～60 cm soil layer, the soil water content of moving dune, semi-fixed dune and fixed dune was respectively 8.08%, 8.00% and 8.03%, and the differences were not significant in this soil layer.In 60～200 cm soil layer, the soil water content of moving dune, semi-fixed dune and fixed dune was respectively 8.65%, 8.57% and 8.53%, and the differences were more significant than those in 60cm layer.In 60～140 cm soil layer, the soil water content of moving dune, semi-fixed dune and fixed dune was respectively 8.76%, 8.62% and 8.54%, and the differences were significant.The soil water content of fixed dune and half-fixed dune in leeside was higher than that in windward side, but the situation was adverse for mobile sand dune.In addition, the soil water was also in diversity in different positions of sand dune as the order of: top of dune < middle of dune < bottom of dune, and it was significant that the soil water difference between sandy land among the dunes and sand dune tops.The study also revealed that the soil water was affected by seasons, presenting obviously seasonal variability. |
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