Study on the second pile- fermentation on quality formation of Anhua dark green tea

To study the effect of second pile- fermentation on quality formation of Anhua dark green tea and make sure the best processing conditions,the research simulated an orthogonal test of the second pile- fermentation under the laboratory conditions by setting up the processing conditions about water contents,pile- fermentation time,air humidity.The physical and chemical analysis showed that in the process of the second pile- fermentation,the contents of tea polyphenols,catechins,amino acids,caffeine,water- soluble sugar and water extract all were decreased while the flavones was changed not significant.Combining with sensory evaluations,the results showed that with 35% water contents,30 hours pile—fermentation time,85% air humidity was the best condition for second pile- fermentation.