Abstract: Based on experiments conducted at the Taoyuan Agro ecological Experimental Station,Chinese Academy of Sciences,in 2001,transpiration of tea plants on red soil slopes was studied with results showing:(1)daily variation of transpiration rate of the tea plants appeared in a shape of inverted saddle,low in the morning and evening and high at noon,and the shape of inverted saddle was changed from day to day;(2)the transpiration rate was subject to a number of micro meteorological factors on the tea plantation. Correlation analysis and multi factor successive regressional analysis revealed that air temperature and net radiation were the two major meteorological factors affecting transpiration of the tea plants;(3)transpiration rate was closely related to leaf stomatal conductivity.The former increased with the rise of the latter.Transpiration driving force, probability of controlling transpiration and regulation of stomatal acts were explored for more efficient use of water.

Key words: tea plant, transpiration, influencing factors