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Effects of biological soil crusts on water infiltration and evaporation Yanchi Ningxia,Maowusu Desert,China

International Journal of Sediment Research 2016年第4期31卷 311-323页

作者： Bai Li Jiarong Gao Xiuru Wang Lan Ma Qiang Cui Maik Vest College of Soil and Water Conservation Beijing Forestry University CEBra-Center for Energy Technology Brandenburg Research Center on Soil and Water Conservation of the Ministry of Water Resources Department of Sedimentation China Institute of Water Resources and Hydropower Research

biological soil crusts serve as a vanguard for improving the ecological environment in arid,semi-arid desertification *** is a good indicator of the level of improvement which the local ecological environment is *** desert areas,water condition is a key factor of improving the ecological *** a first layer protection,biological crusts play an important role in local vegetation succession due to their abilities to conserve and maintain *** Maowusu desert in Yanchi of Ningxia province as an example,after three years of research,this paper chooses three kinds of biological crusts including lichen,moss and cyanobacterial which are under the cover of Artemisia ordosica as research *** results of this study indicate that,the closer biological crusts are to Artemisia ordosica vegetation,the thicker they *** the same position of Artemisia ordosica vegetation,the thickness of moss crusts is the highest,followed by lichen crusts,and the thickness of cyanobacterial crusts is the *** soil crusts coverage protects the natural water content of soil layers from0 to 5 ***,it effects falling water to infiltrate deeper,and cannot prevent the surface water content from evaporating *** effect of biological crusts blocking water infiltration decreases with the increase of *** the same rainfall level,moss crusts provide the strongest water infiltration blockage,followed by lichen crusts and cyanobacterial *** the increase of rainfall,the depth of water infiltration *** the same rainfall level,the relationship of water infiltration depth is as follows:cyanobacterial crusts > lichen crusts > moss *** the increase of biological crusts thickness,they blocking water infiltration capacity is stronger,and the depth of water infiltration is *** on the characteristic of simulated rainfall process on biological crusts shows that sandy land can be fixed by applying appropri

关键词： Lichen crusts Moss crusts Cyanobacterial crusts the thickness of biological crusts Simulated artificial rainfall Desertification area

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