贵州富锌硒茶产区地质环境条件与土壤元素地球化学特征

Geological Environmental Conditions and Soil Element Geochemical Characteristics in the Zinc-Selenium-Rich Tea Producing Areas in Guizhou Province

通过对贵州不同区域典型茶园进行野外调查,在每个茶叶主产区选择代表性的茶园进行土壤剖面样品采集,探讨贵州富锌硒茶产区地质环境条件与土壤元素地球化学特征。结果表明:贵州茶叶主产区成土母岩及土壤中主要元素含量水平存在明显的区域差异,富锌硒茶产区成土母岩中S、Ca、Fe、P、Mo含量均明显高于非富锌硒茶产区,其次是Zn、Se、Cu;而对应土壤中Mo、Cu、Mn、Zn、Fe、Ca含量均显著大于非富锌硒茶产区,其次是Se、Mg、P、S、Al。成土母岩的Zn、Se含量直接影响茶园土壤中Zn、Se的含量水平,土壤Zn、Se含量还受其他元素含量的影响,土壤Zn含量与Al、Fe、Ca、Mg、Mn、Mo含量之间达到极显著正相关,而土壤Se含量与Al、Fe、Cu、Mg、P、S含量存在极显著正相关。贵州境内富锌硒茶产区地质环境条件与土壤元素地球化学组成存在明显的空间异质性。

Through field surveys of typical tea gardens in different regions of Guizhou Province,representative tea gardens in each main tea area were selected to collect soil profile samples so that the geological environmental conditions and soil element geochemical characteristics of the zinc-selenium-rich tea areas were explored.The result show that there were significant regional differences in the contents of main elements in the host rock or soil of the main tea areas of Guizhou Province,by which the contents of S,Ca,Fe,P,and Mo in the host rock in the zinc-selenium-rich tea area were significantly higher than that in the non-zinc-selenium-rich tea area,followed by Zn,Se,Cu;and the contents of Mo,Cu,Mn,Zn,Fe,and Ca in the soils of the zinc-selenium-rich tea area were obviously higher than those in the non-zinc-selenium-rich tea area,followed by Se,Mg,P,S,and Al.Also,the content of Zn,Se in the host rock was directly affected by the content of Zn,Se in the soil,but the content of Zn or Se in the soil was affected by the contents of other elements,which there was a very significant positive correlation between Zn content and the content of Al,Fe,Ca,Mg,Mn,and Mo in the soil,and there was a very significant positive correlation between Se content and the content of Al,Fe,Cu,Mg,P,and S in the soil.There is obvious spatial heterogeneity for the geological environmental conditions and the geochemical composition of soil elements in the zinc-selenium-rich tea areas in Guizhou Province.