Soil Water Conditions Under Various Vegetations in Southern Fringe of Takelamakan Desert

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Soil Water Conditions Under Various Vegetations in Southern Fringe of Takelamakan Desert
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                        AN Gui-xiangAN Gui-xiang
Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, Xinjiang 830011, China;Graduate University of the Chinese Academy of Sciences, Beijing 100049, China;Cele National Field Science Observation and Research Station of Desert Grassland Ecosystem, Xinjiang 848300, China
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ZENG Fan-jiangZENG Fan-jiang
Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, Xinjiang 830011, China;Cele National Field Science Observation and Research Station of Desert Grassland Ecosystem, Xinjiang 848300, China
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SUN Xu-weiSUN Xu-wei
Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, Xinjiang 830011, China;Graduate University of the Chinese Academy of Sciences, Beijing 100049, China
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LIU BoLIU Bo
Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, Xinjiang 830011, China;Graduate University of the Chinese Academy of Sciences, Beijing 100049, China;Cele National Field Science Observation and Research Station of Desert Grassland Ecosystem, Xinjiang 848300, China
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LIU ZhenLIU Zhen
Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, Xinjiang 830011, China;Graduate University of the Chinese Academy of Sciences, Beijing 100049, China;Cele National Field Science Observation and Research Station of Desert Grassland Ecosystem, Xinjiang 848300, China
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ZHANG Xiao-leiZHANG Xiao-lei
Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, Xinjiang 830011, China;Graduate University of the Chinese Academy of Sciences, Beijing 100049, China;Cele National Field Science Observation and Research Station of Desert Grassland Ecosystem, Xinjiang 848300, China
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Affiliation:YI Peng-fei,Hudan·Tumaerbai,WANG Yi-min,WU Zheng-guang,ZHANG Jing-zhu(College of Water Conservancy and Civil Engineering,Xinjiang Agricultural University,Urumqi,Xinjiang 830052,China)
Clc Number:S275.6 S153.61
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Abstract:

Over a long period of field experiment,soil water conditions were monitored in different woodlands with plants ofTamarix ramosissima, Populus euphratica,Alhagi sparsifoliaandCalligonum caput-medusae.Soil water retention curves from 0cm to 100cm were fitted for farmland and desert soils based on field data.The results show that,soil water contents gradually increased with depth in 0-250cm.During the growing season of September and October,soil water contents in 0-60cm layer were significantly higher than in the other months.Single heavy rainfall supplied a considerable amount of water to the soil layer of 0-60cm,while deeper soils were affected very little.The monthly change of soil water storage capacity was insignificant,fluctuating between120mm and140mm.However,the storage capacity differed in the fourspecies as in order ofP.euphratica>T.ramosissima>C.caput-medusae=A.sparsifolia.The evapotranspiriation ofP.euphratica, C.caput-medusae,T.ramosissimaandA.sparsifoliaduring the growing season ranged from high to low,respectively,as the highest values were observed in June.Exponential relationship between soil water contents and soil water potentials was found in the layer of 0-100cm for each soil,and all the correlation coefficients were over 0.90.The results provide necessary theoretical references for ecological water needs of vegetation recovery in this area.

Key words:soil moisture;vegetation construction;soil water retention curve;Takelamakan Desert;Southern Fringe

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安桂香,曾凡江,孙旭伟,刘波,刘镇,张晓蕾.塔克拉玛干沙漠南缘不同植被区土壤水分状况研究[J].水土保持通报英文版,2011,(1):63-67,164

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Received:July 05,2010
Revised:August 05,2010
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Online: October 25,2012
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