Affiliation:
1. Tea Research Institute, Chinese Academy of Agricultural Science, Hangzhou 310008, China
2. College of Horticulture and Plant Protection, Henan University of Science and Technology, Luoyang 471023, China
3. Zhejiang Climate Center, Hangzhou 310056, China
Abstract
Shading is an effective agronomic technique to protect tea plants from intense sunlight. However, there are currently very few studies on more effective shading methods to improve the quality of summer tea. In this study, ‘Longjing43’ plants were grown under four different shading treatments for 14 days, with no shading as the control. Among the four shading treatments, double-layer-net shadings had the most positive impact on the tea quality, resulting in higher levels of amino acids but lower levels of tea polyphenols. Additionally, double-layer-net shadings provided more suitable microenvironments for tea plants. The tea leaves in T4 (double nets 50 cm above the plant canopy) contained 16.13 mg∙g−1 of umami and sweet amino acids, which was significantly higher than in other treatments. T4 had the lowest air temperature and the most suitable and stable soil water content. Interestingly, the ratio of red light to far-red light in T4 was only 1.65, much lower than other treatments, which warrants further study. In conclusion, the microenvironment induced by shading can greatly affect the tea quality, and double-layer-net shading is better for improving the quality of summer tea.
Funder
National Key Research and Development Program of China
Key Research and Development Program of Zhejiang
earmarked fund for CARS
Subject
Plant Science,Ecology,Ecology, Evolution, Behavior and Systematics
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