Rare Tea Variety-Zijuan

The scientific and technological personnel of Yunnan Tea Research Institute found a tea tree with purple buds, leaves and stems in the tea garden where more than 600,000 Yunnan big-leaf tea trees were planted in more than 200 mu of the institute. The baked green tea made from its fresh leaves is purple in color and purple in soup color, pure aroma and strong taste. Because the tea tree has purple buds, purple leaves and purple stems, and the dried green tea and tea soup are all purple, it is specially named "Zijuan".

1. Botanical characteristics

Zijuan tea tree belongs to small tree type, large leaf type, medium bud species. The tree posture is semi-spreading, the branch position is high, the branch density is medium, the leaf is oblique, the leaf length 11.0~13.0cm, the leaf width 3.4~3.6cm, the willow leaf shape, the leaf tip, the leaf color purple, the petiole is purplish red, the leaf is hard, the leaf vein is 9: 11 pairs on average, the leaf surface is smooth, the leaf margin is flat, the serrated tooth is shallow, obtuse and sparse. Corolla diameter 4.10cm × 3.44cm, petals 5-6, color white with green, soft texture; calyx 5, diameter 0.45cm, pedicel long 0.89cm, calyx and pedicel color light purple; petals, calyx and pedicel without hairs; style length 1.25cm, 3-lobed, cleavage mostly 1 stroke 3; ovary velutty, pistil equal height, stamens about 240, base connected. The flowering stage is in the first ten days of October, and the seed setting rate is low. The tea fruit is spherical or long oval in shape, the pericarp is slightly purple in color, the average thickness is 0.71mm, the fruit is 2-3-loculed, the fruit diameter is 1.96cm × 1.77cm, and the seeds are oval or hemispherical.

two。 Biological characteristics of new shoots

The spring bud germination period of Zijuan tea tree is in late February, and one bud and three leaves are in full bloom from late March to early April. Strong sprouting ability, medium germination density, purple bud leaves, more fat, more hairy, strong tenderness. The weight of one bud with three leaves is 115g. The cuttage has strong propagation ability, high survival rate, strong cold resistance, drought resistance, disease and insect resistance, so it is suitable for planting in large-leaf area, and the cultivation method is the same as Yunnan big-leaf species. The yield of this tea variety is medium. According to the experiment of Yunnan Tea Research Institute, the average dry tea yield per mu of 6-10-year-old tea trees is 103.3kg per mu.

3. Analysis of the quality of tea production

According to the analysis of the biochemical laboratory of Yunnan Tea Research Institute, the content of tea polyphenols, amino acids and water extracts in the steamed green samples prepared from the one-bud and two-leaf spring tea of Zijuan tea variety was 35.52%, 3.49% and 44.58%, respectively. In summer, the content of theaflavins in broken tea was 0.91%, theanubicin 6.99%, theaflavins 5.86%, the sensory evaluation strength score was 34.7 points, and the freshness score was 37.6 points.

4. Antihypertensive effect

In 1991, Lin Yongyue, a senior engineer of Yunnan Pharmaceutical Research Institute, and others conducted several antihypertensive experiments with domestic cats with body weight 2.5~3.5kg. The results showed that Zijuan green tea reduced blood pressure by 35.53%, which was better than Yunnan big leaf green tea (29.04%).

At present, Yunnan Tea Research Institute is increasing the reproduction of Zijuan tea varieties on the basis of developing Zijuan antihypertensive health tea, and expects to develop and utilize it in weight loss, blood sugar reduction and other aspects.