Shading Effect on the Content of Free Amino Acids, Minerals, and Fatty Acids in Tea Leaves(Camellia sinensis O. Kuntze)

차광정도(遮光程度)가 차엽(茶葉)의 아미노산(酸), 무기성분(無機成分), 지방산(脂肪酸) 함량(含量)에 미치는 영향(影響)

  • Park, Jang-Hyun (Bosong Tea Research Station, Chonnam Provincial Rural Development Administration) ;
  • Choi, Hyeong Kuk (Bosong Tea Research Station, Chonnam Provincial Rural Development Administration) ;
  • Kim, Kwang-Sik (Dep. or Agriculture Chemistry, Chonman National University)
  • Published : 1996.09.30

Abstract

The effect of shading on the mineral components, free amino acid, and fatty acid content of tea shoot was examined under different shading conditions. The results are summarized as follows. The content of Total-Nitrogen and theanine in the tea leaves was the highest in the 95% shading as 5.49% and 15580 mg/kg, respectively, while they were the lowest in the unshading. The contents of total free acid were ranged from 24670 to 30210 mg/kg, showing higher content in the 95% shading than that in the unshading. The contents of ammonium nitrogen, potassium, and magnesium were higher in the all treatments of shading than that of unshading but vise versa in calcium content. The content of total fatty acid was the highest in the 55% + 95% shading as 27990 mg/kg, while that of unshading was the lowest as 24356 mg/kg showing the increasing order of $C_{18:3}$, $C_{18:2}$, $C_{18:0}$, $C_{18:1}$, $C_{18:0}$. The quality of tea leaves was improved with the treatment of shading compared to that of unshading showing the best in the 95% shading.

차광도(遮光度)가 다른 재배환경이 다엽의 무기성분, 유리아미노산. 지방산(脂肪酸) 함량에 미치는 영향(影響)을 검토한 결과는 다음과 같다. 전질소(全窒素) 함량(含量)은 95%차광구(遮光區)에서 5.49%로 가장 높았고 총 아미노산의 경우 차광처리구가 무처리구에 비해 함량이 더 많았고, 24670-30210mg/kg, Theanine은 95%차광구에서 15580 mg/kg으로 가장 많았고, 무처리구가 12470 mg/kg으로 가장 함량이 적었다. $NH{_4}^+$, $K^+$, $Mg^{+{+}}$는 차광구에서 함량이 높았고, $Ca^+$는 무처리구에서 함량이 높았다. 지방산 함량은 55% + 95%처리구가 27990 mg/kg으로 가장 많았고, 무처리구가 24350 mg/kg으로 가장 적었으며, 다엽의 지방산은 $C_{18:3}$, $C_{18:2}$, $C_{18:0}$, $C_{18:1}$, $C_{18:0}$ 순으로 함량이 많았다. 차광정도에 관계 없이 차광처리구가 무처리구에 비해 차엽 품질이 향상 되었으며, 특히 95% 차광구에서 품질이 가장 양호 하였다.

Keywords