模拟硝田土壤铁和硫的形态转化特征及其影响因素
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四川农业大学资源学院,雅安市雨城区林业局,四川农业大学资源学院,四川农业大学资源学院,四川农业大学资源学院,四川农业大学资源学院,四川农业大学资源学院

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S153

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科技部基础性工作专项项目(2014FY110200A12)、国家自然科学基金面上项目(41371230)和大学生科研兴趣计划项目资助。


Fe and S Transformation Characteristics and Their Influential Factors in Simulated Mirabilite Soil
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College of Resources, Sichuan Agricultural University,Forestry bureau of Yucheng district, Ya’an,College of Resources, Sichuan Agricultural University,College of Resources, Sichuan Agricultural University,College of Resources, Sichuan Agricultural University,College of Resources, Sichuan Agricultural University,College of Resources, Sichuan Agricultural University

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    摘要:

    采用室内培养试验,在确定模拟硝田土壤硫酸钠含量的基础上,观测并探讨落干/淹水状况、有机物质种类与数量对模拟硝田土壤铁和硫形态转化特征的影响。结果表明:全铁(Fet)和游离铁(Fed)受落干/淹水状态和有机物质种类与数量的影响均不显著,而活性铁(Feo)、络合铁(Fep)、亚铁离子(Fe(II))及有效铁(Fea)受淹水及有机物质数量的显著影响,Fe(II)、Fea还受有机物质种类的显著影响;硫形态转化同时受淹水及有机物质种类与数量的影响;土壤铁、硫形态转化一方面通过有机物质与铁、硫的直接作用实现,一方面通过改变土壤氧化还原电位(Eh)及还原性物质总量(TARM)等氧化还原状况实现;铁与硫的形态转化也表现出一定的耦合关系。

    Abstract:

    In an indoor incubation experiment, Na2SO4 contents of simulated mirabilite soil were determined, and then the effects of drying-submergence and different kinds and quantities of organic substances on Fe and S transformation in the soil were observed and discussed. The results showed that drying/submergence and organic substances had no significant effect on Fet and Fed. However, submergence and the quantities of organic substances had significant effects on Feo, Fep, Fe(Ⅱ) and Fea. Moreover, Fe(Ⅱ) and Fea were significantly affected by organic substances as well. Submergence and organic substance both could promote S transformation in the soil. Fe and S transformation was realized by direct reaction of organic substance, on the other hand, by changing the conditions of soil redox regime including Eh and TARM. Besides, there was a coupling relationship between the transformation of different forms of Fe and S in the soil.

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杨 汛,李 艳,袁大刚,李小英,陈 娜,王乙焱,陈冠桦.模拟硝田土壤铁和硫的形态转化特征及其影响因素[J].土壤,2017,49(2):248-255. YANG Xun, LI Yan, YUAN Dagang, LI Xiaoying, CHEN Na, WANG Yiyan, CHEN Guanhua. Fe and S Transformation Characteristics and Their Influential Factors in Simulated Mirabilite Soil[J]. Soils,2017,49(2):248-255

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历史
  • 收稿日期:2016-04-10
  • 最后修改日期:2016-05-11
  • 录用日期:2016-05-17
  • 在线发布日期: 2017-03-22
  • 出版日期: 2017-04-25