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《Journal of Ecology and Rural Environment》 2008-01
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Temporal and Spatial Distribution Characteristics of Near Ground Temperature in Tea Farm Under Temperature Inversion in Early Spring.

LI Ping-ping,DAI Qing-ling,HU Yong-guang,YUAN Jun-jie,MU Jian-hua(Key Laboratory of Modern Agriculture Equipment and Technology,Ministry of Education & Jiangsu Province/Institute of Agricultural Engineering,Jiangsu University,Zhenjiang 212013,China)  
In order to protect tea plants from frost damage in early spring,it is necessary to know temporal and spatial distribution characteristics of near ground temperature under temperature inversion.Horizontal distribution of temperature at tea plant canopy,diurnal change in ground temperature and vertical distribution of temperature within 7 m above ground was monitored in tea fields on flat land,and slopes different in exposure(north and south).Results show that in early spring,when the weather is clear,the diurnal temperature difference in the tea garden would be sharp,over 10 ℃ on average and even up to 20 ℃ in maximum.Moreover,a clear night with little wind tends to lead occurrence of temperature inverse,thus triggering formation of frost.Temperature inverse is intense between 21:00 and 06:00,and peaks at dawn(05:00-06:00).The intensity of temperature inversion varies with height and reaches the most at 4 m above the ground.Tea plants on north slope are affected most by temperature inverse and susceptible to damage of frost.Ground temperature varies gently and peaks at dusk in a day,and moreover,is always higher on flat land than on north slope.
【Fund】: 江苏省国际科技合作项目(BZ2006039);; 镇江市农业科技计划项目(NY2005001);; 江苏省农业三项工程项目[SX(2007)001]
【CateGory Index】: S571.1
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