模拟硝田土壤铁和硫的形态转化特征及其影响因素
发布时间：2019-06-02 10:31
【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]:On the basis of determining the content of sodium sulfate in simulated nitrate soil, the effects of falling dry / flooded condition and the type and quantity of organic matter on the transformation characteristics of iron and sulfur form in simulated nitrate field were observed and discussed by laboratory culture experiment. The results showed that all iron (Fet) and free iron (Fed) were not significantly affected by the dry / flooded state and the type and quantity of organic matter, but the active iron (Feo), complex iron (Fep), was not significantly affected by the dry / flooded state and the type and quantity of organic matter. Ferrous ion (Fe (II) and available iron (Fea) were significantly affected by flooding and the number of organic substances., Fe (II), Fea was also significantly affected by the types of organic substances. The transformation of sulfur form is affected by the type and quantity of flooded and organic substances at the same time. On the one hand, the transformation of soil iron and sulfur forms is realized by the direct interaction of organic matter with iron and sulfur, on the other hand, the redox status of soil redox potential (Eh) and total reductive substance (TARM) is changed. The morphological transformation of iron and sulfur also shows a certain coupling relationship.
【作者单位】： 四川农业大学资源学院;雅安市雨城区林业局;
【基金】：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) 大学生科研兴趣计划项目资助
【分类号】：S153.6
，
本文编号：2491029
[Abstract]:On the basis of determining the content of sodium sulfate in simulated nitrate soil, the effects of falling dry / flooded condition and the type and quantity of organic matter on the transformation characteristics of iron and sulfur form in simulated nitrate field were observed and discussed by laboratory culture experiment. The results showed that all iron (Fet) and free iron (Fed) were not significantly affected by the dry / flooded state and the type and quantity of organic matter, but the active iron (Feo), complex iron (Fep), was not significantly affected by the dry / flooded state and the type and quantity of organic matter. Ferrous ion (Fe (II) and available iron (Fea) were significantly affected by flooding and the number of organic substances., Fe (II), Fea was also significantly affected by the types of organic substances. The transformation of sulfur form is affected by the type and quantity of flooded and organic substances at the same time. On the one hand, the transformation of soil iron and sulfur forms is realized by the direct interaction of organic matter with iron and sulfur, on the other hand, the redox status of soil redox potential (Eh) and total reductive substance (TARM) is changed. The morphological transformation of iron and sulfur also shows a certain coupling relationship.
【作者单位】： 四川农业大学资源学院;雅安市雨城区林业局;
【基金】：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) 大学生科研兴趣计划项目资助
【分类号】：S153.6
，
本文编号：2491029
本文链接：https://www.wllwen.com/kejilunwen/nykj/2491029.html
