西藏林芝地区农田土壤蒸发对大气温湿度的响应

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Abstract

Soil evaporation is a key factor of moisture migration and water cycling at the soil-air interface and strongly influenced by temperature and humidity. To elucidate the relationships between soil evaporation rate and air temperature and humidity, the air temperature and humidity and soil evaporation rate at Linzhi farmland were studied using the H₂O/CO₂ flux instrument. The relationships of soil evaporation and air temperature and humidity were estimated by correlation analysis. Results showed that the diurnal variation of soil evaporation rate could be expressed as a single-peak curve, and the peak value and valley value of Re appeared at 14:00-15:00 and early morning respectively. The air temperature and humidity variations were the same to Re. The evaporation rate had a significantly positive correlation to the air temperature (R>0.9, P<0.001) and air humidity (R>0.7, P<0.001).

Key words： Linzhi Soil evaporation rate Air temperature Air humidity

Received: 25 April 2013

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	LIU He-man
	CAO Li-hua
	MA He-ping

Cite this article:

LIU He-man,CAO Li-hua,MA He-ping. Responses of soil evaporation rates to air temperature and air humidity on farmland in Linzhi, Tibet[J]. , 2013, 32(2): 241-245.

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http://www.ecolsci.com/EN/ OR http://www.ecolsci.com/EN/Y2013/V32/I2/241

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