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投稿时间:2021-07-31
投稿时间:2021-07-31
中文摘要: 采用LED红光光源(630 nm),研究全程光照、前半程光照、后半程光照不同光照萎凋时间对白茶感官品质、主要生化成分以及香气物质的影响。结果表明:后半程光照萎凋的白茶感官审评滋味得分最高,具有“醇厚、较浓、鲜爽”的特征,其天冬氨酸、天冬酰胺、茶氨酸、甘氨酸、苯丙氨酸、缬氨酸、鸟氨酸、氨基酸总量和可溶性糖含量显著高于其它处理(P<0.05);其咖啡碱、表没食子儿茶素没食子酸酯(epigallocatechin gallate,EGCG)、表儿茶素没食子酸酯(epicatechin gallate,ECG)、没食子儿茶素没食子酸酯(gallocatechin gallate,GCG)、儿茶素没食子酸(catechin gallate,CG)、表儿茶素(epicatechin,EC)、儿茶素(catechin,C)、酯型儿茶素、非酯型儿茶素和儿茶素总量,显著高于全程光照萎凋的白茶(P<0.05),与前半程差异不显著(P>0.05)。前半程光照萎凋的白茶香气检测物质数量(69种)和香气物质总含量(326.921 μg/L)最高,形成了“花香”的风格特征,其感官审评的香气因子得分最高,苯甲醇、苯乙醇、香叶醇、芳樟醇及其氧化物、β-环柠檬醛、顺-柠檬醛、α-紫罗酮、β-紫罗酮、反-香叶基丙酮、6-甲基-5-庚烯-2-酮、水杨酸甲酯、δ-杜松烯、罗汉柏烯、柏木烯、α-柏木烯、α-荜澄茄油烯、萘等香气物质含量高于其它处理。
Abstract:This study aimed to explore the effects of different lighting time(full-course lighting,lighting in the first-half course and lighting in the second-half course)in the withering process on the sensory quality,main biochemical components,and volatile aroma compounds of white tea.The LED red light source(630 nm)was used.The results showed that the white tea exposed to lighting in the second-half course had the highest taste score and tasted mellow,thick and refreshing.It had higher content of aspartic acid,asparagine,theanine,glycine,phenylalanine,valine,ornithine,total amino acids and soluble sugar than other treatments(P<0.05).Moreover,the white tea exposed to lighting in the second-half course had higher content of caffeine,epigallocatechin gallate(EGCG),epicatechin gallate(ECG),gallocatechin gallate(GCG),catechin gallate(CG),epicatechin(EC),catechin(C),ester catechins,non-ester catechins,and total catechins than the white tea exposed to full-course lighting(P<0.05)and had no significant difference in these parameters compared with the sample exposed to lighting in the first-half course(P>0.05).The number of aromatic compounds(69)and the total content of volatile aroma compounds(326.921 μg/L)of the white tea exposed to lighting in the firsthalf course were the highest,which formed the flower fragrance and gave the highest aroma score.Specially,the white tea exposed to lighting in the first-half course had higher content of benzyl alcohol,phenylethyl alcohol,geraniol,linalool and its oxide,β-cyclocitral,cis-citral,α-ionone,β-ionone,trans-geranylacetone,6-methyl-5-heptene-2-one,methyl salicylate,δ-cadinene,thujopsene,cedrene,α-cedrene,α-cubebene and naphthalene than other treatments.
keywords: withering under red light time of lighting white tea biochemical components aroma compounds
文章编号:202217020 中图分类号: 文献标志码:
基金项目:四川省重点研发项目(2020YFN0154-05);四川省科技计划项目(2021YJ0491);四川省农业科学院中试熟化与示范转化工程项目(CGZH2019FP10);茶叶标准与检测技术四川省重点实验室开放基金项目(STTT202101)
作者 | 单位 |
黄藩1,2,王迎春1,马伟伟1,刘晓1,张厅1,冯德建2*,罗凡1*,赵文净3 | 1.四川省农业科学院茶叶研究所,四川 成都 610066;2.茶叶标准与检测技术四川省重点实验室,四川 成都 610044;3.宁德师范学院,福建 宁德 352100 |
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