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The present studies were performed mostly to elucidate changes of leaf temperature and transpiration rate of Cymbidium goeringii Reich. as influenced by some outstanding environmental factors such as air temperature, light intensity, wind speed, and relative humidity, etc. Leaf temperature increased as the air temperature and light intensity increased, and showed an inversely proportional relationship to the air humidity and wind speed. An abrupt increase in leaf temperature among few important factors was caused by varied light conditions. Certain extent of the wind speed efficiently stopped an increase in leaf temperature. Transpiration rate increased as leaf temperature increased, and started dropping from 25C. An increase in wind speed also increased the transpiration rate, and it started decreasing from the level of 2.5 m/sec on. This strongly suggested the fact that the shading (maximum 10,000 lx) and wind blowing (about 2 m/sec) serve as very important cares for growing Cymbidium goeringii.
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