The Technical Research For Improving The Quality Of Baxian Black Tea

Taking fresh tea leaves of Zhaoan Baxian, using the technologies of appending enzymes and making oolong tea,the best methods were researched to improve quality of black tea.Cellulose,pectase and papain were appended in black tea process.The result showed that:appending enzymes could improve quality of black tea;saccharides and water extract of tea were increased observably by appending cellulose and petcase;amino acids of tea was increased by appending papain;the best methods were appending cellulose,pectase in withering process and appending papain in fermentation.Cellulose,pectase and tannase were mixed to append in fermentation of black tea. The result showed that:the contents of tea polyphenols, caffeine,flavonoid,catechin were less than control group;the contents of TF and TR were more than control group;the contents of catechin were decreased observably by appending tannase;the best method was M9 treatment.Be researched the tests of YQ group, the result showed that:the contents of tea polyphenols, caffeine, amino acids, saccharides,flavonoid,TF and TR were less than the control group;the best method was YQ5 treatment;rocking of green leaf could increased tea aromatic substances.Be researched the tests of SQ group, the result showed that:the contents of tea polyphenols, amino acids, accharides were increased;the affection was different according to the different season;the best methods were SQ6 treatment in spring and SQ4 treatment in autumn.Be researched the tests of SY group, the result showed that:the contents of catechin were less evidently than the control group;the best method was SY2 treatment.