Dew Formation and Effect by Canopy of Sabina vulgaris in Semi-arid Area of Inner Mongolia

For researching of the effect of dew on Sabina vulgaris,using methods of artificial condensation surface,detached shoots and bag closure of potted culture to determine dew formation and absorption by canopy of Sabina vulgaris on arid season.The results indicated that the capacity of dew formation was the biggest on 100cm of Sabina vulgaris canopy,which can represent capacity of the whole canopy.There were three periods that were the previous period of dew formation(14∶00～ 22∶0),the period of dew formation(22∶00～8∶00),the evaporated period of dew(8∶00～14∶00),respectively.The intercepting quantity of dew by artificial condensation surface and detached shoots were linear positive correlation with dew duration.Sabina vulgaris canopy of high density could uninterrupted provide water vapor to soil direction,at the same time,effect of dew was significant to Sabina vulgaris.