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.
陈炫炽,陈蓉,吴愈锋,王跃跃. 基于RS和GIS的都匀茶树种植地质背景调查[J]. 国土资源遥感, 2020, 32(1): 224-231.
Xuanchi CHEN,Rong CHEN,Yufeng WU,Yueyue WANG. Research on the geological background of tea planting in Duyun City based on RS and GIS. Remote Sensing for Land & Resources, 2020, 32(1): 224-231.
Peng Y S, Chen R, Yang R D , et al. Correlation among heterophyllin B content in Pseudostellaria heterophylla,stratum and some trace elements content in Wudang District[J]. Southwest China Journal of Agricultural Sciences, 2015,28(1):274-278.
Peng Y S, Chen R, Yang R D , et al. Genuineness of herbs and 14 elements contents in Pseudostellaria heterophylla and planting soil in Wudang District of Guiyang City[J]. Guizhou Agricultural Sciences, 2014,42(11):109-113.
Birke M, Reimann C, Rauch U , et al. GEMAS:Cadmium distribution and its sources in agricultural and grazing land soil of Europe—Original data versus clrtransformed data[J]. Journal of Geochemical Exploration, 2016,173:13-30.
Martin A P, Turnbull R E, Rattenbury M S , et al. The regional geochemical baseline soil survey of southern New Zealand:Design and initial interpretation[J]. Journal of Geochemical Exploration, 2016,167:70-82.
Xu H Q, Zhang B B, Guan H D , et al. Detection of soil erosion area under forest canopy in the red soil region of southern China using remote sensing techniques:Changting County,Fujian Province[J]. Scientia Geographica Sinica, 2017(8):147-153.