基于粒度方法的大气降尘对浙江省新嵊盆地土壤的物源输入研究  

Atmospheric Dust Input to Soils in Xin-sheng Basin,Zhejiang Province Based on Grain Size Analysis

作　　者：任玉成 阮丽 李欣[1] 徐妍 张方方 李建武[1,2] REN Yucheng;RUAN Li;LI Xin;XU Yan;ZHANG Fangfang;LI Jianwu(Key Laboratory of Soil Contamination Bioremediation of Zhejiang Province,Zhejiang A&F University,Ling’an,Zhejiang 311300,China;Institute of Soil Science,Chinese Academy of Sciences,Nanjing 210008,China;Tea Research Institute,Chinese Academy of Agricultural Sciences,Hangzhou 310008,China)

机构地区：[1]浙江农林大学浙江省土壤污染生物修复重点实验室,浙江临安311300 [2]中国科学院南京土壤研究所,南京210008 [3]中国农业科学院茶叶研究所,杭州310008

出　　处：《土壤》2021年第4期865-873,共9页Soils

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(2020R412048)资助。

摘　　要：为揭示大气降尘对亚热带季风区土壤资源的影响,本文以亚热带地区典型玄武岩发育土壤为研究对象,采用土壤地理学和土壤粒度分析方法,分析表层土壤样品的粒度组成、粒度频率曲线和高含量的“风尘基本粒级”(10~50μm)的粒度分布特征,结果表明大气降尘对土壤表层的影响深远。土壤Sr-Nd同位素比值辅助证据也进一步说明表层也不断受到来自大气降尘的影响。研究剖面土壤表层样品的粒度组成、频率曲线、粒度参数和Sr-Nd同位素比值均指示显著的风尘特性,而底土层土壤样品则大多数继承了母岩的特性。揭示了大气降尘对该区域土壤资源的重要补给作用和对土壤发生演变的重要影响。In this paper,the typical soil profiles derived from the basalt were selected in the Xin-sheng Basin,Zhejiang Province of subtropical monsoon region of China,and the methods of soil geography and grain size analysis were used to reveal the impact of atmospheric dust on soil by measuring the composition and frequency curve of soil grain sizes and high content of“wind dust basic”(10–50μm)of topsoil.The results showed that atmospheric dust had far-reaching effect on topsoil,which was also supported by Sr/Nd isotopic ratios of topsoil.The composition,frequency curve and parameters of grain size as well as Sr-Nd isotope ratio all indicated that topsoil had significant characteristics of wind dust,while most bottom soils inherited the characteristics of the parent rock.In conclusion,atmospheric dust has an important effect on the material supply,genesis and evolution of soil in the studied region.

关 键 词：大气降尘 粒度 同位素 玄武岩 

分 类 号：P595[天文地球—地球化学]