长江流域资源与环境 >> 2025, Vol. 34 >> Issue (07): 1470-.doi: 10.11870/cjlyzyyhj202507002

•　自然资源　• 上一篇    下一篇

长江下游冲积平原土壤阳离子交换性能演变特征及影响因素

纪佳辰，许明旭，宿宝巍，张娅璐，焦赫，李升峰，高超   

  1. (南京大学地理与海洋科学学院，江苏 南京 210033)
  • 出版日期:2025-07-20 发布日期:2025-07-23

Evolution of Soil Cation Exchange Property and Influencing Factors in the Lower Yangtze River Alluvial Plain

JI Jiachen, XU Mingxu， SU Baowei， ZHANG Yalu， JIAO He， LI Shengfeng， GAO Chao   

  1. Cation exchange capacity is an important indicator of soil quality. Revealing the regional spatial differentiation and dynamic change characteristics of soil cation exchange capacity can provide a scientific basis for the rational utilization of soil resources. In this paper, the polder areas of the alluvial plain along the lower Yangtze River were selected. By constructing a soil time series of 3000 years, the evolution characteristics of soil cation exchange property were analyzed. With the increase of cultivation time, the pH of the flood plain soil decreased rapidly, and the soil organic carbon content (SOC) generally increased gradually. Exchangeable Ca2+, Mg2+, total exchangeable bases (TEB) and base saturation (BS) decreased by 497%, 607%, 425% and 699% respectively, while K+ increased by 297%. The cation exchange capacity (CEC) increased continuously in the early stage, yet it showed a downward trend afterward. Compared with the polder area that had been reclaimed for 2000 years, the CEC of the dry land and paddy field that had been reclaimed for 3000 years decreased by 252% and 234% respectively. The main factors affecting the soil cation exchange capacity were soil texture and SOC content. The influence of land use patterns was reflected in the re-base process during rice cultivation, which increased BS. A relatively satisfactory result could be obtained by predicting the CEC using factors such as SOC, texture, reclamation history and land use. Our results based on soil chronosequence observation indicated that sufficient attention should be paid to the problem of the decline in cation exchange capacity and other soil quality indicators after long-term utilization in the alluvial plain areas along the Yangtze River.
  • Online:2025-07-20 Published:2025-07-23

PDF (PC)

1

摘要： 阳离子交换性能是土壤质量的重要指标，揭示土壤阳离子交换性能的区域空间分异和动态变化特征，可以为土壤资源的合理利用提供科学依据。选择长江下游沿江平原圩区，通过构建跨度达3 000 a的土壤时间序列，分析了人为影响下土壤阳离子交换性能的演变特征。随着耕作时间的增加，长江冲积物母质形成的沿岸平原土壤pH快速下降，有机碳含量（SOC）总体上逐渐提升。交换性Ca2+、Mg2+、盐基总量（TEB）和盐基饱和度（BS）分别下降了49.7%、60.7%、42.5%和69.9%，K+则增加了297%。阳离子交换量（CEC）先期持续上升，后期又出现下降趋势，与围垦2 000 a的圩区相比，3 000 a旱地和水旱轮作地CEC分别下降了25.2%和23.4%。研究区内影响土壤阳离子交换性能的主要因素是土壤质地和SOC含量，土地利用方式的影响体现在水稻种植过程中复盐基作用提高了BS。利用SOC、质地、围垦历史和土地利用等因子预测土壤阳离子交换性能可以得到较为满意的结果。通过土壤时间序列分析，沿江平原区长期利用后阳离子交换性能和其它土壤质量指标下降的问题应该引起足够的重视。

No related articles found!
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed   
No Suggested Reading articles found!
ISSN 1004-8227
CN 42-1320/X
主管：中国科学院
主办：中国科学院武汉文献情报中心
地址： 武汉市武昌小洪山西区25号 中国科学院武汉文献情报中心内《长江流域资源与环境》编辑部
邮编：430071　
电话：027-87198181
E-mail： bjb@mail.whlib.ac.cn

版权所有 © 2018 《长江流域资源与环境》编辑部