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Abstract To investigate the geological background of Duyun tea planting, the authors studied the relationship between geological background and high quality Duyun tea planting efficiently and rapidly based on the theory of agricultural geology and using RS and GIS technology. Firstly, by using Sentinel-2A and Landsat8 remote sensing images and object-oriented classification method in combination with customized TEI and tea phenology information, high-precision extraction of tea planting areas was realized. Then, the spatial analysis function of GIS was used to count the distribution of various geological backgrounds in Duyun and the area of tea planting on different backgrounds accurately, and the geological background of tea planting in Duyun was investigated comprehensively. Lastly, the geochemical characteristics of rocks with different backgrounds were investigated by testing and analyzing the sampled data, and the planting map of suitable geological background area for tea planting in Duyun was compiled. The results show that the chemical elements in Duyun clastic rocks are obviously better than those in carbonate rocks. Clastic rocks are the advantageous geological background for tea planting and the important influencing factors for Duyun to produce high quality tea. The distribution area of clastic rocks accounts for 47.86% of the total area of Duyun, which means that clastic rocks possess the largest proportion of all lithologies, followed by dolomite, which accounts for 16.80%. 67.82% of Duyun tea is planted in clastic rock background, which is the basic condition for local tea production.
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Keywords
RS
GIS
Douyun tea
geological background
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Corresponding Authors:
Rong CHEN
E-mail: 1304656630@qq.com
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Issue Date: 14 March 2020
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