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| Relationship between transpiration character of Prunus armeniaca and environmental factors under different soil moisture |
| Liu Shuo,He Kangning |
| Key Lab.of Soil & Water Conservation and Desertification Combating,Ministry of Education,College of Soil and Water Conservation,Beijing Forestry University,100083,Beijing,China |
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Abstract In order to master the factors having impact on the transpiration of Prunus armeniaca in arid area.In the controlling of controlling soil moisture,using portable steady porometer（Li-1600） and so on,transpiration rate（Tr） of Prunus armeniaca and atmosphere environmental factors were conducted under the condition of typical sunny day.The results show that the daily changes of transpiration rate（Tr） and stomatal resistance（Gs） of Prunus armeniaca appeared as double-peak curve and "W" curve in different soil moisture.And the response curves of transpiration rate to soil water content（θ） answer for cubic,the soil water content of the highest transpiration rate（Tr） is 18.01%、16.86% respectively in August and September.The relationship between transpiration rate（Tr） and atmosphere environmental factors increased as these four levels of soil（water） content（θ） climbing.When soil water is scarcity,solar effective radiation is the mainly factor to affect transpiration rate（Tr） in August,and so is air temperature in September.When soil water is sufficient,relative humidity is the mainly factor to affect transpiration rate in August,air temperature in September.
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Received: 05 July 2006
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