Ecohydrological change mechanism of a rainfed revegetation ecosystem at southeastern edge of Tengger desert,Northwest China |
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| Authors: | Honglang Xiao Guodong Cheng Xinrong Li Yaoxuan Song Xinping Wang |
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| Institution: | 1.Shapotou Desert Experimental Research Station, Cold and Arid Regions Environmental and Engineering Research Institute,ChineseAcademy of Sciences,Lanzhou,China |
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| Abstract: | Study is made on a 45 km-long artificial ecosystem without irrigation in Tengger desert on the basis of long-term ecological monitoring and ecohydrological fundamentals. Changes in water allocation, utilization, cycle and balance patterns in more than 40-year evolution of the soil-plant system are analyzed. The formation of a drought horizon in shrub rhizosphere and its effect, ecohydrological function of the crust and its effect on the soil-plant system change are discussed. Driven by water self-regulation and water stress, the soil-plant system is going to develop towards the steppe desert to ensure more effective use and optimum collocation of water resource. |
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