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[1]WU Wen-yi,YU Xian-wei,YANG Xiao-hui,et al.Dew-fall in Different Position of Dunes in the Northern Marginal Zone of the Kubuqi Desert[J].Research of Soil and Water Conservation,2008,15(03):88-92.

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Dew-fall in Different Position of Dunes in the Northern Marginal Zone of the Kubuqi Desert

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 15 Number of periods: 2008 03 Page number: 88-92 Column: Public date: 2008-06-20

Title:: Dew-fall in Different Position of Dunes in the Northern Marginal Zone of the Kubuqi Desert

Author(s):: WU Wen-yi¹, YU Xian-wei², YANG Xiao-hui¹, YU Chun-tang¹, LU Xiao-jie³; 1. State Key Laboratory of Forestry Bureau on Cultivating Trees, Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, China;
2. Higher Professional Technology Institutue of Shenyang Agricultural University, Shengyang 110122, China;
3. College of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China

Keywords:: ecotone; the daily amount of dew-fall; sun-shaded slope; shady slope; interdune area; the top of sand dune

CLC:: S157;X171.1

DOI:: -

Abstract:: A measurement program was carried out with a sand dune belt situated in between the northern Kubuqi desert and riverside of the Yellow River,to measure daily amount of dew deposition during the dew formation for different parts of sand dune.Then we can determine the character of distribution of the amounts of dew in fine scale.The measurement showed that the daily amount of dew ranged between 0.172 mm/night and 0.324 mm/night and the amount of dew ranged within the four parts of sand dune are 0.248~0.377 mm in interdune area,0.160～0.362 mm in sun-shaded slope,0.17～0.305 mm in shady slope and 0.051～0.272 mm in the top of sand dune respectively. A value of 0.03 mm,which also marks the threshold for dew availability for microorganisms,was taken as a threshold for dew.So,dew as a ecological factor in arid and semi-arid ecosystems is indispensable.There is a different quantities of dew-fall in dissimilar part of sand dune.The results showed that the order of the dew-fall quantities from high to low was interdune area>sun-shaded slope>shady slope>the top of sand dune.At the same time,the daily amount of dew in sun-shaded slope is more variable than in shady slope between the the upper position and the lower position the slope.

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