摘要
成土母质的均一性判定是土壤发生研究的必要起点,也是构建土壤时间序列和评价土壤质量变化的先决条件。选取浙江省新嵊盆地典型玄武岩发育土壤剖面为研究对象,采用土壤地理学和元素地球化学方法,通过对土壤剖面的形态特征、颗粒组成、母质不连续性系数、稳定元素Ti与Zr比值以及稀土元素分布模式等指标的分析,进行不同土壤剖面母质均一性的判定。研究结果表明,土壤颜色、结构、根系等土壤剖面形态自下而上呈现均一、渐变特性特征,且所有剖面没有发现异源堆积特征,可以初步直观判定研究剖面的母质均一性;土壤颗粒组成及扣除黏粒后的粗粉粒/中粉粒含量等指标都比较均一,并沿剖面垂直方向呈现较好的渐变趋势;Ti/Zr比值和稀土元素配分模式在不同层次间的分布也没有明显的差异;母质均一性系数均介于-0.6~0.6之间。因此,研究剖面内与剖面间母质来源相同。
The homogeneity of parent material during soil formation process is a necessary starting point for the study of soil occurrence,and is also a prerequisite for constructing soil time series and evaluating soil quality change.The morphological characteristics,particle size composition,uniformity of parent material,distribution of rare earth element Ti and Zr and their ratio within typical basalt soil profiles in the Xinsheng Basin,Zhejiang Province were investigated by using the methods of soil geography and element geochemistry,and the uniformity of parent material in different soil profiles were determined.The results showed that the morphological characteristics of soil profile,such as the soil color,structure,root system,showed uniform and gradual characteristics from bottom to top,and no heterogenous accumulation characteristics were found in all profiles,which could preliminarily and intuitively determine the parent material homogeneity of the study profiles;soil grain size composition and coarse/medium silt content after deducting clay particles were relatively uniform,and showed relatively higher vertical direction along the profile.There was no obvious difference between the Ti/Zr ratio and the distribution of rare earth elements at different soil layers.The uniformity coefficient of parent material was between-0.6 and 0.6.Therefore,the source of parent material in the study section is the same as that in the cross section.
作者
王孝
叶青
李建武
王旭东
李欣
阮丽
陶安
WANG Xiao;YE Qing;LI Jian-wu;WANG Xu-dong;LI Xin;RUAN Li;TAO An(College of Environment and Resources,Zhejiang Agriculture and Forestry University,Hangzhou 311300,China;State Key Laboratory of Sustainable Development of Soil and Agriculture,Nanjing 210008,China;Tea Research Institution,Chinese Academy of Agricultural Sciences,Hangzhou 310008,China)
出处
《土壤通报》
CAS
CSCD
北大核心
2021年第2期253-260,共8页
Chinese Journal of Soil Science
基金
国家自然科学基金项目(41877006)
浙江省自然科学基金项目(LY21D010002)
浙江省新苗人才计划项目资助(2020R412009)资助。
关键词
新嵊盆地
母质均一性
土壤发生
稀土元素
The Xinsheng basin
Homogeneity of parent material
Soil genesis
Rare earth element
