Abstract:

Based on the meteorological data of Yingshan National Meteorological Station from 2013 to 2021, taking Yingshan tea as the research object, the Changchong Tea Factory was selected as the observation area, the change characteristics of the growth period and yield factor index in different tea rounds were analyzed. The correlation analysis and significance test were used to explore the correlation between meteorological factors and yield at different growth periods. The results showed that the duration of growth period of different rounds of tea was the first round tea> the third round tea> the second round tea. Bud density, average 100 bud weight and theoretical fresh leaf yield all were three round tea> two round tea> first round tea, while the actual fresh leaf yield was two round tea> three round tea> first round tea. The average temperature and relative humidity during the key growth period of different rounds of tea in Yingshan was the third round tea> the second round tea> the first round tea. The precipitation was the third round tea> the first round tea> the second round tea. The sunshine was the second round tea> the first round tea> the third round tea. The number of foggy days reached 50%. The above conditions were suitable for tea plant growth. The precipitation, relative humidity, temperature and sunshine hours of the first round tea decreased with the change of the year. The precipitation, relative humidity and sunshine hours of the second round tea decreased with the annual change, while the average temperature increased. However, the precipitation and temperature of the third round tea showed an upward trend with the change of the year, while the relative humidity and sunshine hours showed a downward trend. Through correlation analysis, it was found that temperature was the first important meteorological factor affecting the growth, development, yield and quality of tea, followed by precipitation and relative humidity, while sunshine played the opposite role.

Key words: growth period, yield components, meteorological condition, relevance, Yingshan tea