Effect of Meteorological Factors on Leaf Water Potential of Platycladus orientalis and Robinia pseudoacacia under Different Water Rejimes

Relationships between meteorological factors and leaf water potential of Platycladus orientalis and Robinia pseudoacacia under different water regimes were studied.The results showed that air temperature was the main impact-factor.The order was air temperature intensity of illumination air relative humidity when the water was adequate for P.orientalis.However,when soil was lack of water,the order was air temperature air relative humidity intensity of illumination.For R.pseudoacacia under any water regime,the orderwas air temperature intensity of illumination air relative humidity.