Influence of Planting Altitude and Harvest Time on the Contents of Functional Components of Huangshan "Songgu" Maofeng Tea

The influence of planting altitude and harvest time on contents of functional components of Huangshan Maofeng tea,such as tea polyphenols,free amino acids,caffeine,tea polysaccharide and selenium were analyed;The functional components of Huangshan Maofeng tea were determined using relevant national standards;The result showed that tea polyphenol contents,free amino acids contents,phenolic ammonia ratio and selenium contents increased with the increased of heights,while caffeine content of Huangshan Maofeng tea planted at high height was significantly higher than the flatlands's,but tea samples'polysaccharide contents picked at different heights had no significant differences.Tea samples' polyphenol contents were the highest in may,followed by these in April,and June's was the lowest;tea samples' free amino acids contents were the highest in Aprilfollowed by May,June's was the lowest;tea samples' phenolic ammonia ratio was the highest in June,followed by May,April's was the lowest;tea samples' caffeine contents,April's was the same as May's,but both higher than June's;tea samples'Ammonia alkali ratio,April's was the highest,May's was the second,June's was the lowest;tea samples' polysaccharide contents were the highest in June,May's was the second,April's was the lowest;tea samples' selenium contents were the highest in April,May's was the same as June's.Heights and harvest periods had interactive influence on tea polyphenols,free amino acids,caffeine,tea polysaccharide and selenium contents of Huangshan Maofeng tea.