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Chinese Journal of Applied Ecology ›› 2016, Vol. 27 ›› Issue (3): 755-760.doi: 10.13287/j.1001-9332.201603.029

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Rainfall and soil moisture redistribution induced by xerophytic shrubs in an arid desert ecosystem

WANG Zheng-ning1,2, WANG Xin-ping2, LIU Bo1*   

  1. 1College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, China;
    2Shapotou Desert Experimental and Research Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China
  • Received:2015-08-24 Online:2016-03-18 Published:2016-03-18
  • Contact: * E-mail: liubo@fafu.edu.cn
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (41371101)

Abstract: Rainfall partitioning by desert shrub canopy modifies the redistribution of incident rainfall under the canopy, and may affect the distribution pattern of soil moisture around the plant. This study examined the distribution of rainfall and the response of soil moisture beneath the canopy of two dominant desert shrubs, Caragana korshinskii and Artemisia ordosica, in the revegetation area at the southeastern edge of the Tengger Desert. The results showed that throughfall and stemflow ave-ragely occupied 74.4%, 11.3% and 61.8%, 5.5% of the gross precipitation for C. korshinskii and A. ordosica, respectively. The mean coefficients of variation (CV) of throughfall were 0.25 and 0.30, respectively. C. korshinski were more efficient than A. ordosica on stemflow generation. The depth of soil wetting front around the stem area was greater than other areas under shrub canopy for C. korshinski, and it was only significantly greater under bigger rain events for A. ordosica. The shrub canopy could cause the unevenness of soil wetting front under the canopy in consequence of rainfall redistribution induced by xerophytic shrub.