Abstract: The effects of weather types on the picking time and quality of Biluochun tea was obviously difference.Based on observed meteorological data from February to April in 1999-2008 and the holistic production investigation data of Dongting Biluochun tea in Wuzhong County,it analyzed that the key meteorological factors effecting on the picking time and quality of Biluochun tea were the temperature and precipitation by statistic analysis method.It showed that the adverse weather conditions include two types: one was the early lower temperature and later higher temperature than the normal year,the other was the unusually cold spell after warmer period in early spring and the favorable weather type was warm spring with alternate rain and sunshine.The results could provide a relatively scientific basis for specialized meteorological service to local Biluochun tea production in the future.

Key words: Biluochun tea, Picking time, Weather types