学术论文

      黄土高原小流域土壤阳离子交换量分布特征及影响因子

      Distribution and Affecting Factors of Soil Cation Exchange Capacity in Watershed of the Loess Plateau

      摘要:
      通过对黄土高原陕北地区3个小流域(朱家沟、纸坊沟和泥河沟)27个采样点的54个土壤样品分析,应用统计方法讨论土壤阳离子交换量的分布特征和影响因子。结果表明:(1)在3个所选定的典型小流域中,土壤CEC呈现明显的地带性,从北到南,CEC值显著升高。(2)在同一流域,CEC垂直地带变化基本表现为随高度降低而增大;而在同一剖面中,表层土壤CEC值总是高于下层。通过相关性分析和逐步回归检验,得出在粘土矿物类型基本相同的前提条件下,影响CEC值变化的主要因素有pH值、土壤黏粒含量和有机质含量,粉粒含量的影响较小,而砂粒含量则与CEC表现出显著负相关。
      Abstract:
      Through analyzing 54 soil samples of 27 sample points in Shanbei watersheds which included Zhujiagou,Zhifanggou and Nihegou,the distribution and affecting factors of soil cation exchange capacity were discussed by statistical method.The results showed that:(1)The soil CEC had obvious zonality,and the CEC value increased markedly from north to south in three selected typical watersheds.(2)The vertical zonality changes displayed that soil CEC increased with height reduced in the same watershed;the CEC value of surface layer were higher than the lower in the same profile.Based on the premise that the clay minerals in the same basic types,by using the correlation analysis and stepwise regression testing,the conclusion as followed: The main factors that influenced CEC value changes had pH,the soil clay content and the organic matter content;the effect of silt content was small;while the sand content showed significant negative correlation with CEC.
      作者: 王文艳 [1] 张丽萍 [2] 刘俏 [1]
      作者单位: 浙江大学环境与资源学院,浙江省亚热带土壤与植物营养重点研究实验室,污染环境修复与生态健康教育部重点实验室,杭州310058 浙江大学环境与资源学院,浙江省亚热带土壤与植物营养重点研究实验室,污染环境修复与生态健康教育部重点实验室,杭州310058 黄土商愿土壤仗馈与早地农业国家重点夹验室,陕西杨凌712100
      刊 名: 水土保持学报 ISTICPKU
      年,卷(期): 2012, 26(5)
      分类号: S153.3
      机标分类号: S15 F32
      在线出版日期: 2012年12月21日
      基金项目: 黄土高原土壤侵蚀与旱地农业国家重点实验室项目