土壤黏粒和磁化率特征对绰墩古水稻土成因的指示  

Significance of Clay Fraction and Magnetic Susceptibility for Origin of Ancient Paddy Soil at Chuodun Agriculture Site

作　　者：李学林[1] 李福春[1] 杨梅 代静玉[1] 陈国岩 杨用钊 LI Xuelin;LI Fuchun;YANG Mei;DAI Jingyu;CHEN Guoyan;YANG Yongzhao(College of Resources and Environmental Sciences,Nanjing Agricultural University,Nanjing 210095,China;Subdistrict Office of Danghu,Jiaxing,Zhejiang 314200,China;Farmland Quality Protection Station,Huai’an,Jiangsu 223001,China)

机构地区：[1]南京农业大学资源与环境科学学院,南京210095 [2]浙江嘉兴平湖市当湖街道办事处,浙江嘉兴314200 [3]淮安市耕地质量保护站,江苏淮安223001

出　　处：《土壤》2019年第6期1226-1231,共6页Soils

基　　金：国家自然科学基金项目(40573057和40571088);国家自然科学基金重点项目(DO115-40335047)资助

摘　　要：本文研究了绰墩农业遗址P-02原状土剖面的粒度分布,定量分析了土壤黏粒的矿物组成,测定了土壤/沉积物及其各粒级组分(黏粒、粉砂粒、细砂粒和粗砂粒)的磁化率。结果表明:在0~30 cm和134~154 cm两层段,黏粒含量从下向上有降低的趋势,这可能预示着长期的水耕作业造成黏粒从表层向亚表层移动;在148~200 cm层段,土壤磁化率从下向上有降低的趋势,可能说明该处存在长期淹水的状况。总之,黏粒含量和质量磁化率数据说明长江下游地区的先民在马家浜文化时期已开始采用"水溽"方式进行水稻的栽培。Vertical changes of grain fractions, mineral components and magnetic susceptibility along P-02 profile of the ancient soil at Chuodun Agriculture Site were studied. The results indicated that clay content in the profile decreased from 30 to 0 cm and from 154 to 134 cm, possibly implying that long flooding resulted in the removal of clays from the surface to subsurface. The decrease of magnetic susceptibility from 200 to 148 cm indicates that the place was in long-term flooding state. The above results demonstrate that the ancient peoples lived in the lower reaches of the Yangtze River cultivated rice by using "flood management" during Majiabang culture period.

关 键 词：绰墩 古水稻土 P-02剖面 磁化率 黏粒 水溽 

分 类 号：S151[农业科学—土壤学]