山东农业科学2018，Vol.50Issue(4)：73-78,6.DOI:10.14083/j.issn.1001-4942.2018.04.016
湖北郧县黄坪村黄土-古土壤序列体积分形维数特征及其环境意义
Volumetric Fractal Dimension Characteristics of Loess-Paleosol Sequence and Its Environmental Significance in Huangping Village,Yunxian County,Hubei Province
摘要
Abstract
The volumetric fractal dimensions of particle-size(D) in soil profile of Huangping Village (HPC), Yunxian County, Hubei Province were calculated by the volumetric fractal dimension mode. The fractal dimension values were between 2. 52 and 2. 78, and the highest one was in the paleosol layer(S0) and the lowest one was in the Malan loess layer(L1). The fractal dimension values in the whole profiles was ranked as DS0 > DLt > DL0 > DL1. This study discovered that the fractal dimension values were positively correlated to the clay content, negatively correlated to the coarse silt content, and was in direct proportion to magnetic susceptibility and CIA value. The fractal dimension could be used to reflect the evolution of pedogenic environment. The higher value reflected warm and humid, whereas lower value reflected arid and cold. The fractal characteristics of HPC soil profile indicted the history of climate change in Hanjiang area. During the late pleistocene, the fractal dimension value of L1 was only 2. 61, indicated cold climate and weak pedogenesis. During the early holocene, the value in Lt increased to 2. 71 compared with L1, which indicated the climate was improved and warmer. During the middle holocene, the value in S0 increased to 2. 75, indicated warm and humid climate and strong pedogenesis. During the late holocene, the value in L0 reduced to 2. 70, indicated that the climate in Hanjiang area became cool.关键词
体积分形维数/粒度组成/磁化率/CIA值/沉积环境Key words
Volumetric fractal dimension/Partide size composition/Magnetic susceptibility/CIA value/Depositional environment分类
农业科技引用本文复制引用
刘涛,庞奖励,黄春长,查小春,周亚利,毛沛妮,胡慧..湖北郧县黄坪村黄土-古土壤序列体积分形维数特征及其环境意义[J].山东农业科学,2018,50(4):73-78,6.基金项目
国家自然科学基金项目(41271108,41371029) （41271108,41371029）
国家社会科学基金项目(14BZS070) （14BZS070）
中央高校基本科研经费项目(GK201704014) （GK201704014）
