Abstract: The correlations of tea quality with altitude and ecological factors on Dabie mountain, Yuexi county, west Anhui were analysed in the paper. The results showed that there was parabolic correlation between tea quality and altitude. The dominant ecological factors of contributed to tea quality were lower temperature, higher relative humidity arid much cloud and vapour in high altitude.

Key words: corn, salt stress, root excision, grain-filling stage, photosynthesis, root activity.