Soil Water Content Variations in Various Micro-habitats on Closed Grasslands Returned from Farmlands in Loess Area
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    Abstract:

    The shortage of soil water is a limited factor affecting restoration and the growth of vegetation in arid and semi-arid areas. Investigations of soil water content variations within depth of 0-60 cm in various microhabitats is therefore of great practical significance for guiding vegetation restoration. Soil samples were collected on sampling grids and soil water content were then measured via oven drying method. The results show that average soil water contents at depth of 0-60 cm was in order from high to low as semi-shade,semi-sunny,and sunny slopes. The average soil water content in 0-60 cm layer varied significantly among hilly slope,shallow gully,small gully,large gully bottom,large gully sunny or semi-sunny slope,large gully shade or semi-shade slope and valley slope on the same aspect of different types. The distribution of soil water content depended mainly on topography and vegetation growth status: the topography affected redistri-bution of precipitation and sunshine,and the vegetation determined rainfall interception and transpiration.Based on soil water content variations,the 21 microhabitat of three aspects were divided into 3 groups,with average soil water contents of 11.68%,8.68% and 5.77%,respectively.

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颉登科,刘世海,薛智德.黄土区退耕封育草地微生境土壤水分变化规律[J].水土保持通报英文版,2011,(3):44-46

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History
  • Received:October 22,2010
  • Revised:November 25,2010
  • Adopted:
  • Online: November 26,2014
  • Published: