Abstract: In the optimal growth season for tea growth, twice applications of 0.0016% propionyl brassinolide AS significantly promote the growth of tea, with tea production increasing by 5.43%-20.52%. Within the selected concentration range, the production increased with the increasing concentration of applied AS. Through biochemical analysis, we found that 0.0016% propionyl brassinolide AS can affect the amino acid, polyphenols and the formation of water extract and reduce phenol ammonia ratio, thereby improving the quality and nutritional value of tea.

Key words: propionyl brassins, tea, production, impact