单宁酸对黄河三角洲盐碱土壤盐基离子有效性的影响

发布时间：2018-08-15 15:51

【摘要】：以黄河三角洲柽柳群落和盐碱光板地土壤为研究对象,利用单宁酸进行培养,通过测定土壤浸提液中盐基离子含量、计算离子比并进行相关统计分析,探讨单宁酸对盐碱土盐基离子有效性的影响.结果表明,随着单宁酸浓度升高,不同盐度土壤浸提液中的K~+、Ca~(2+)、HCO3-以及高盐土壤中的Cl-和低盐土壤中的SO_4~(2-)逐渐升高,而Na~+、Mg~(2+)、低盐土壤中的Cl-和高盐土壤中的SO_4~(2-)先升高后降低;不同盐度土壤中Na~+/K~+、Na~+/Ca~(2+)、Ca~(2+)/K~+、Mg~(2+)/K~+、Cl-/HCO_3~-、SO_4~(2-)/HCO_3~-和低盐土壤中的Cl-/SO_4~(2-)随着土壤中单宁酸浓度升高而降低,但Na~+/Mg~(2+)、Ca~(2+)/Mg~(2+)和高盐土壤中的Cl-/SO_4~(2-)则逐渐升高;方差分析的结果显示,单宁酸浓度除对高盐土壤中的Na~+影响不显著之外,对其他盐基离子及其比值的影响均达到显著水平;相关分析的结果表明,SO_4~(2-)在低盐土壤中与K~+、Na~+、Mg~(2+)和HCO_3~-之间的相关性与高盐土壤相反,而其他离子之间的相关性在不同盐度土壤中一致.综上,单宁酸能够降低土壤颗粒对盐基离子的吸附,促进土壤脱盐,因此可利用单宁酸或将其作为辅助材料改良盐碱土,但应适当控制单宁酸的用量,以促进更多Na~+的脱除及防止过多Ca~(2+)和K~+的流失.
[Abstract]:The soil of Tamarix chinensis community and saline-alkali light plate soil in the Yellow River Delta were studied and cultured with tannic acid. The content of basic ions in the soil extract was determined, the ion ratio was calculated and the correlation statistical analysis was carried out. The effect of tannic acid on the availability of salt base ions in saline-alkali soil was investigated. The results showed that with the increase of tannic acid concentration, the K ~ (2) Ca ~ (2) HCO ~ (3-) in different salinity soils, Cl- in high-salt soils and so _ (4 ~ (2-) in low-salt soils increased gradually, while Na ~ + mg ~ (2), Cl ~ (-) in low-salt soils and so _ (4 ~ (2-) _ (2) in high-salt soils increased at first and then decreased in high-salt soils. In different salinity soils, Na ~ / K ~ (2) Na ~ (2) Ca ~ (2) / K ~ (2) / K ~ (2) / K ~ (2) / K ~ (2) -K ~ (2) -K ~ (2) -K ~ (2) -K ~ (2) -K ~ (2) -K ~ (2) -K ~ (2) -K ~ + -K ~ (2) -K ~ (2) -K ~ (2) -K ~ (2) -K ~ (-) / K ~ (2) -K ~ (2) -K ~ + -K ~ (2) -K ~ (2) -K ~ (2) -K ~ (2) -K ~ + -K ~ (2) -K ~ (-) -K ~ (2) -K ~ (2) -K ~ (2) -K ~ (2) -K ~ (2) -K ~ (2) -K ~ ( The effect of tannic acid concentration on other base ions and their ratios was significant except that the effect of tannic acid concentration on Na ~ + in high-salt soil was not significant. The results of correlation analysis showed that the correlation between tippon 42- and K ~ + Na ~ + mg ~ (2) and HCO3- in low-salt soil was contrary to that in high-salt soil, but the correlation between other ions was the same in different salinity soils. In conclusion, tannic acid can reduce the adsorption of soil particles to base ions and promote the desalination of soil. Therefore, tannic acid can be used as an auxiliary material to improve saline-alkali soil, but the dosage of tannic acid should be controlled appropriately. In order to promote the removal of more Na ~ (2) and prevent the loss of excessive Ca ~ (2) and K ~ (2).
【作者单位】：烟台大学环境与材料工程学院;中国科学院烟台海岸带研究所中国科学院海岸带环境过程与生态修复重点实验室山东省海岸带环境过程重点实验室;
【基金】：国家自然科学基金项目(41201293) 国家重点研发计划项目(2016YFD002003003-04) 山东省重点研发计划项目(2016CYJS05A01-1)资助~~
【分类号】：S156.4

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