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Remote Sensing for Land & Resources    2020, Vol. 32 Issue (1) : 224-231     DOI: 10.6046/gtzyyg.2020.01.30
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Research on the geological background of tea planting in Duyun City based on RS and GIS
Xuanchi CHEN, Rong CHEN(), Yufeng WU, Yueyue WANG
Mining College, Guizhou University, Guiyang 550025, China
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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.
Keywords RS      GIS      Douyun tea      geological background     
:  TP79  
Corresponding Authors: Rong CHEN     E-mail: 1304656630@qq.com
Issue Date: 14 March 2020
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Xuanchi CHEN
Rong CHEN
Yufeng WU
Yueyue WANG
Cite this article:   
Xuanchi CHEN,Rong CHEN,Yufeng WU, et al. Research on the geological background of tea planting in Duyun City based on RS and GIS[J]. Remote Sensing for Land & Resources, 2020, 32(1): 224-231.
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https://www.gtzyyg.com/EN/10.6046/gtzyyg.2020.01.30     OR     https://www.gtzyyg.com/EN/Y2020/V32/I1/224
Fig.1  Location of study area
Fig.2  Extraction process of tea planting information
Fig.3  Spectral curves of different vegetation
Fig.4  Contrast of landmark characteristics between image and TEI
Fig.5  TEI Value of different vegetation near Gaozhai Reservoir
Fig.6  Distribution of tea planting in Duyun
Fig.7  Overlay map of tea planting area and petrologic series
岩性 面积/km2 占总面积
百分比/%		 茶树种植
面积/km2		 占茶树种植总
面积百分比/%
石灰岩 305.60 13.37 0.22 3.48
白云岩 384.33 16.80 0.94 15.18
石灰岩白云岩互层 263.46 11.51 0.57 9.25
碳酸盐岩夹碎屑岩 213.63 9.33 0.26 4.20
碎屑岩 1 095.15 47.86 4.21 67.82
第四系 25.86 1.13 0.00 0.07
总计 2 288.03 100 6.20 100
Tab.1  Geological background of tea planting
岩石
类型		 岩石
编号		 常量元素 微量元素
P/(mg·
kg-1)		 K/
%		 S/
%		 Na/
%		 Al/
%		 Ca/
%		 Fe/
%		 Mg/
%		 Mn/(mg·
kg-1)		 Zn/(mg ·
kg-1)		 Cu/(mg ·
kg-1)		 Mo/(mg·
kg-1)		 V/(mg·
kg-1)		 Co/(mg·
kg-1)
碎屑
岩		 1 390 3.69 0.01 0.14 8.95 0.02 5.04 1.45 202 108 16.3 0.12 122 24.0
2 490 2.90 0.01 0.52 8.29 0.05 4.50 1.34 380 102 9.9 0.24 105 32.7
均值1 440 3.30 0.01 0.33 8.62 0.04 4.77 1.40 291 155 13.1 0.18 114 28.4
非碎
屑岩		 1 140 1.01 0.03 0.04 1.81 20.80 0.83 8.06 115 22 6.7 0.15 22 4.6
2 160 1.90 0.02 0.05 2.77 15.85 1.15 9.40 121 37 3.5 0.41 27 5.3
3 40 1.17 0.02 0.02 0.42 20.10 0.51 11.80 86 12 4.9 0.90 9 11.3
均值2 113 1.36 0.02 0.04 1.67 18.92 0.83 9.75 107 24 5.0 0.49 19 7.1
均值1-均值2 327 1.94 -0.01 0.29 6.95 -18.88 3.94 -8.35 184 131 8.1 -0.31 95 21.3
Tab.2  Content of rock chemical element
Fig.8  Advantage zoning of tea planting in Duyun City
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