新梢的生长离不开营养物质,而营养物质在茶树体内的代谢平衡总是处在动态之中,因此,伴随着新梢的生长其内含成分也是不断改变的。如果以多酚类物质含量的变化代表碳代谢,氨基酸总量的变化代表氮代谢,那么,新梢碳、氮代谢的平衡就受诸如季节、茶树生理年龄、环境因子、栽培措施等的影响而变动。一般每类茶的品质都要求有一定的碳、氮含量 The growth of new shoots is inseparable from nutrients, and nutrients in the metabolism of tea is always in the balance of the body, therefore, with the growth of new shoots its content is also constantly changing. If the change of polyphenol content represents carbon metabolism, the change of total amino acid represents nitrogen metabolism, then the balance of carbon and nitrogen metabolism of shoots is affected by such factors as season, physiological age of tea plant, environmental factors, cultivation measures and the like change. In general, the quality of each type of tea requires a certain amount of carbon and nitrogen