Tea variety: Zhenong 21

Type of crop: tea tree

Variety name: Zhenong 21

Breeding unit: tea Research Institute of Zhejiang University

Variety source: selected from a single plant of Yunnan big-leaf species in Pingyang

Provincial examination and approval: approved by Zhejiang crop Variety approval Committee in 1992

Characteristics: it belongs to small tree type, middle leaf type, mesophyte is early. The tree is unfolded and the branches are stout. The leaf color is dark green, the mesophyll is thick, the leaf shape is oval, the leaf surface glossiness is very strong, the bud leaf is strong, fluffy, one bud three leaves hundred buds weigh 104.0 grams. The dry sample of one bud and two leaves contains 2.8% amino acids, 25.0% tea polyphenols and 4.1% caffeine. The quality of black tea is similar to that of Qianmei 419, and that of green tea is similar to that of Fuding Dabai tea. The cold resistance is moderate.

Yield performance: the quality comparison test began in 1973, and in the first two years from 1975 to 1976, the yield was 37.9% higher than that of Fuding Dabai tea. During the national regional trial from 1997 to 2001, it was 1.37-13.18% higher than the green tea control Fuding Dabai tea, but 17.52-21.12% lower than the black tea control Qianmei 419.

Key points of cultivation techniques: under the specification of row spacing of 1.5 meters, single-row or double-row close planting should be adopted; anti-freezing and seedling protection should be done in young age; timely and batch picking.