Effects of soil nitrogen and pH in tea plantation soil on yield and quality of tea leaves
Effects of soil nitrogen and pH in tea plantation soil on yield and quality of tea leaves
- Author(s) Y.H. Wang, L. Hong, Y.C. Wang, Y.W. Yang, L.W. Lin, J.H. Ye, X.L. Jia and H.B. Wang
- Year: 2022
- Month: January
- Volume: 55
- Pages: 51-60
We studied the effects of soil nitrogen and pH in tea plantation soil on tea tree yield and quality in 90-tea plantations in Anxi county, Fujian province, China. The tea tree rhizosphere soil samples were collected for soil pH, ammonium nitrogen and nitrate nitrogen content from 90-tea plantations. The yield of tea tree and the contents of tea polyphenols, theanine and caffeine in tea leaves increased with the increase in soil pH. Secondly, as the soil pH increased, the content of ammonium nitrogen and the ratio of ammonium nitrogen to nitrate nitrogen in tea tree rhizosphere soil also increased, but the content of nitrate nitrogen decreased. Further the yield of tea tree and the contents of tea polyphenols, theanine and caffeine increased, with the increase in ratio of ammonium nitrogen to nitrate nitrogen in the soil. The pH of tea plantation soil was significantly positively correlated with the tea tree yield and quality, and the content of soil ammonium nitrogen, but negatively correlated with nitrate content in soil. This study provides basis for the scientific and rational use of nitrogenous fertilizers in tea plantations.
