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| THE INFLUENCE OF ECOGEOCHEMICAL ENVIRONMENT ON THE QUALITY OF GREEN TEA IN RIZHAO CITY |
| WANG Cun-long1, CAI Qing1, ZHANG Zu-lu2, ZHENG Wei-jun1, LIU Guang-bo3, YU Chao1 |
1. Shandong Institute of Geological Survey, Jinan 250013, China;
2. College of Population, Resources and Environment, Shandong Normal University, Jinan 250014, China;
3. Shandong Institute of Surveying and Mapping of Geology, Jinan 250014, China |
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Abstract Based on a systematic analysis of geological and geochemical environment of Rizhao tea-producing area, the authors hold that terrain, geomorphology, soil physical and chemical properties and elements content have important effects on tea quality. The correlation between total soil elements quantity and tea quality is not obvious, but the abundance and deficiency of effective elements have great impact on the tea quality. When the content of the available N, SiO2 is relatively high, he content of free amino acids, caffeine and total ash in the tea will be higher, and the tea quality will be also higher. When the pH value of the soil and the effective content of Ca, Mg are comparatively high, the content of free amino acids, caffeine and total ash, and flavonoids in the tea will decrease, and the quality of the tea will also decrease. The correlation between water extracts and most effective elements is relatively obvious. The results obtained by the authors provide the basis for programming of Rizhao green tea producing area and south-to-north tea transfer.
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Received: 17 October 2012
Published: 10 October 2013
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