母质对南方丘陵区水耕人为土理化性质演变的影响  

INFLUENCE OF PARENT MATERIAL ON EVOLUTION OF PHYSICO-CHEMICAL PROPERTIES OF HYDRAGRIC ANTHROSOLS IN HILLY REGIONS OF SOUTH CHINA

作　　者：韩光中[1,2,3] 张甘霖[2,3] 

机构地区：[1]内江师范学院地理与资源科学学院,四川内江641112 [2]土壤与农业可持续发展国家重点实验室(中国科学院南京土壤研究所),南京210008 [3]中国科学院大学,北京100049

出　　处：《土壤学报》2014年第4期772-780,共9页Acta Pedologica Sinica

基　　金：国家自然科学基金项目(41071142);中国科学院知识创新工程项目(KZCX3-EW-405-1)资助

摘　　要：基于时间序列系统分析了我国南方丘陵区三种母质起源的水耕人为土理化性质的演变,结果表明:成土母质可以决定黏粒与土壤有机碳(SOC)对人为水耕成土过程的敏感性,明显影响其演变特征。游离铁(Fed)对人为水耕的成土过程非常敏感,其迁移与转化主要受人为水耕成土过程影响,受成土母质影响很小;硅酸盐铁(Fet-Fed)对人为水耕的成土过程不敏感,但全铁(Fet)含量的分布主要受Fed的影响。黏粒的淋失会对土壤中元素的迁移与分布产生重要影响,造成SiO2相对富集和Al2O3相对亏损,在利用由Al和Si两种元素计算所得到的一些指标指示丘陵区水耕人为土的发育程度时一定要慎重;而TiO2在水耕人为土发育过程中相对稳定,可以作为稳定元素来指示水耕人为土演变过程中其他元素的迁移率。Chronosequence analysis done of three Hydragric Anthrosols derived from purple sand shale, quaternary red clays and red sandstone, respectively, in hilly regions of South China to explore evolutions of their basic physicochemical properties. Results show that parent material was the major factor determining sensitivity of clay and SOC to forming processes of the soils and hence apparently evolution of their soil properties. Free ion （Fe,） was very sensitive to the soil forming processes, and its translocation and transformation was mainly affected by the latter, rather than soil parent material. However silicate iron （Fet-Fd） was not so sensitive to soil forming processes, and the distribution of total ion （Fe,） was affected mainly by Fed. Loss of clay had some important effects on migration and distribution of soil elements, causing enrichment of SiO2 and loss of Al2O3 in the soils. It must, therefore, be careful in working out some indices to indicate development stages of Hydragric Anthrosols by using the two elements, Al and Si. TiO2 was relatively stable throughout the soil forming processes and hence could be used to indicate migration rates of other major elements in the paddy soils.

关 键 词：水耕人为土 时间序列 母质 演变特征 

分 类 号：S151.3[农业科学—土壤学]