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Study on Transpiration and Water Consumption of Hippophae rhamnoides and Agropyron cristatum in the Loess Area of Western Shanxi Province
Huaxing Bi
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Abstract
The typical vegetation,such as Hippophae rhamnoides,Agropyron cristatum,were selected in the Loess area of west- ern Shanxi province.And the transpiration,light intensity,stomatic resistance of the vegetation were observed and analyzed.The results showed as follows:diurnal course of transpiration rate of Hippophae rhamnoides and Agropyron cristatum are single- peak type curve,the max transpiration rate of Hippophae rhamnoides is higher than that of Agropyron cristatum in cloudy day but is lower in sunny day.In different weather condition,the influence of light intensity on the transpiration is bigger than sto- matic resistance.The daily transpiration amount of Hippophae rhamnoides is smaller than that of Agropyron cristatum.Above the results will be provide the science basis of improving forest water use efficiency for the Loess area.