生態農業：農業精準栽培管理技術開發【土壤環境科學系賴鴻裕教授】
| 論文篇名 | 英文：Comprehensive Analysis Revealed the Specific Soil Properties and Foliar Elements Respond to the Quality Composition Levels of Tea (Camellia sinensis L.) 中文：土壤性質及元素吸收對茶葉組成之影響 |
| 期刊名稱 | AGRONOMY-BASEL |
| 發表年份,卷數,起迄頁數 | 2022 12(3), 670 |
| 作者 | Tseng, Wen-Yu; Lai, Hung-Yu(賴鴻裕)* |
| DOI | 10.3390/agronomy12030670 |
| 中文摘要 | 四季春在臺灣中部低海拔地區是一代表性之茶種，在地理環境不佳的地區更需要進行土壤管理以提升茶的品質。本研究之目的為尋找影響茶葉品質之土壤因子，從20個茶園採集土壤及茶葉進行13種土壤性質、9種必需元素與鋁之分析，並分析茶湯的多酚、兒茶素、黃酮、游離胺基酸及咖啡因。皮爾森相關分析及主成分分析結果顯示，土壤中的有效性營養素含量並無法反映出茶葉中的必需元素含量，雖茶葉中適當之巨量元素及鋅可以增加茶湯中多酚、游離胺基酸及咖啡因之含量，但卻會降低黃酮含量，而土壤pH、電導度、交換性鈣、交換性鎂、總錳及總銅含量會影響茶湯中游離胺基酸之含量。本研究之結果顯示，將土壤pH維持在3.51~5.21及管理土壤的交換性鈣、交換性鎂鋅含量對於提升茶湯汁鮮味是有幫助的。 |
| 英文摘要 | C. sinensis cv. Sijichun is a representative Taiwanese low-altitude tea cultivar native to central Taiwan. To enrich the taste of tea in a geographically disadvantaged area, soil management became necessary but was obscure. The purpose of this study was to screen the main soil factors that influence the quality composition levels of tea to optimize the efficiency of tea tree horticulture. Soil and tea leaf samples collected from 20 tea plantations determined thirteen soil properties, nine leaf element nutrients and aluminum, and five main extractable quality compositions, including polyphenols, catechins, flavones, free amino acids, and caffeine in tea infusion. Pearson’s correlation analysis and principal component correlation analysis showed that soil available nutrients cannot respond to the concentration of corresponding essential elements in tea leaves; nevertheless, adequate leaf macronutrients and Zn could enhance polyphenol, free amino acid, and caffeine contents, but decreased flavone contents, and showed their consistent effect by soil characteristics. Of note, soil pH, EC, exchangeable calcium, exchangeable magnesium, total concentration of manganese, and total concentration of copper were shown as significant impact factors on free amino acid content. In summary, regulating the pH of soil under 3.51–5.21 in our study and managing soil effective Ca, Mg, and Zn supply could help to obtain a greater umami taste of tea. |
| 發表成果與本中心研究主題相關性 | 本研究以低海拔之四季春為例，透過茶園土壤及茶葉之調查，找出影響茶葉及茶湯品質之土壤因子，並期未來能透過土壤管理方式以提升茶葉之品質，及達到茶園永續經營之目標，上述這些研究內容及成果符合永續農業發展研究中心之主要研究主題。 |
