摘要
With the aid of TDM (thermal dissipation method) with ICT\|2000TE (Transpiration Environment), the results obtained were as follows: (1) The sap flow rate of Quercus liaotungensis varied differently in sunny days, cloudy days and rainy days, with their maximum value of 12 61 cm·h -1 , 8 71 cm·h -1 and 3 22 cm·h -1 ,respectively. The intermittent sap flow at night was commonly lower than 1cm·h -1 , which testified the existence of root pressure of Q. liaotungensis . (2) In the growth season of July and August, the sample wood of Q. liaotungensis had the average sap flow flux of 60 25cm 3·cm -2 d -1 and total evaporations of 1 346 7 L. (3) The sap flow rate was frequently affected by microclimatic factors. During sunny days and cloudy days, it was mainly affected by the solar radiation, air relative humidity and air temperature. While during rainy days, it was mainly affected by the soil water content and air relative humidity.
With the aid of TDM (thermal dissipation method) with ICT\|2000TE (Transpiration Environment), the results obtained were as follows: (1) The sap flow rate of Quercus liaotungensis varied differently in sunny days, cloudy days and rainy days, with their maximum value of 12 61 cm·h -1 , 8 71 cm·h -1 and 3 22 cm·h -1 ,respectively. The intermittent sap flow at night was commonly lower than 1cm·h -1 , which testified the existence of root pressure of Q. liaotungensis . (2) In the growth season of July and August, the sample wood of Q. liaotungensis had the average sap flow flux of 60 25cm 3·cm -2 d -1 and total evaporations of 1 346 7 L. (3) The sap flow rate was frequently affected by microclimatic factors. During sunny days and cloudy days, it was mainly affected by the solar radiation, air relative humidity and air temperature. While during rainy days, it was mainly affected by the soil water content and air relative humidity.
出处
《林业科学》
EI
CAS
CSCD
北大核心
2004年第2期174-177,共4页
Scientia Silvae Sinicae
基金
国家自然科学基金重大项目 ( 3 98993 70 )
国家林业局重点项目 ( 2 0 0 1-3 )太岳山定位站
北京林业大学研究生基金资助
