[Phenological analysis upon yield and quality of Flos Lonicerae]

Yield and quality of Flos Lonicerae varied in different phenological phase. Yield in the first flowering season was the highest. Yield in the last three flowering season decreased one by one. The dry weight of one thousand flower buds and chlorogenic acid content in the first flowering season were the highest during a year, then was the fourth, the second and the third were both the lower. The difference of above was related to such biologic factors as days of flower bud differentiation, types of flower branch, leaf area, chlorophyll content, and also to such climatic factors as air temperature, hours of sunshine and precipitation.