文献类型：期刊文献

中文题名：模拟酸雨对砖红壤盐基离子迁移和释放的影响

英文题名：INFLUENCES OF SIMULATED ACID RAIN ON LEACHING AND RELEASE OF BASE IONS IN LATOSOL

作者：凌大炯[1];章家恩[2];黄倩春[1];韩维栋[1];欧阳颖[3]

机构：[1]广东海洋大学农学院,广东湛江524088;[2]华南农业大学农学院,广州510642;[3]Department of Water Resources,St.Johns River Water Management District,Palatka,Florida,USA

年份：2007

卷号：44

期号：3

起止页码：444

中文期刊名：土壤学报

外文期刊名：Acta Pedologica Sinica

收录：CSTPCD、、北大核心2004、Scopus、CSCD2011_2012、北大核心、CSCD

基金：广东省自然科学基金项目(010274;032246);广东省科技攻关项目(2002C5050201;2004B20101017)资助

语种：中文

中文关键词：模拟酸雨;砖红壤;盐基离子;迁移;释放

外文关键词：Simulated acid rain; Latosol ; Base ion ; Leaching; Release

中文摘要：对发育于玄武岩的砖红壤进行了室内模拟酸雨淋溶试验,结果表明:(1)酸雨淋溶土壤会引起土壤盐基离子的大量淋失。以土壤中的K+最易于淋失,Ca2+、Mg2+的淋失量最大。酸雨pH愈低,Ca2+、Mg2+、K+的迁移量愈大。酸雨淋溶土壤的时间越长,盐基离子的迁移量越大。(2)土壤经≥5d的酸雨淋溶后,土壤交换性盐基离子的含量均随淋溶时间的增加而减少。酸雨的pH不同,则土壤交换性盐基离子所受的影响不同。(3)与原土壤相比较,短期(≤5d)的酸雨淋溶,可使土壤交换性Ca2+、K+以及强酸性(pH≤3.0)酸雨淋溶的交换性Mg2+增加;土壤被酸雨较长时间(≥10d)淋溶后,则会降低土壤交换性Ca2+、Mg2+、K+的含量;不同时间的酸雨淋溶,均会降低土壤交换性Na+的含量。(4)土壤经酸雨淋溶后,某些矿物会发生风化,释放出盐基离子,也会使部分交换性盐基离子转成非交换态。

外文摘要：An experiment of leaching of latosol developed from basalt with simulated acid rain was carried out. Results show 1 ） simulated acid rain caused a large amount of leaching loss of soil base ions, among which potassium was the easiest to get leached and calcium and magnesium were the highest in amount ; the lower the pH values and the longer the duration of simulated acid rain, the higher the leaching amount of soil base ions; 2） after 5 days of leaching with simulated acid rain, the amount of soil exchangeable base ions decreased with the increase in leaching time ; and the effect varied with pH of the simulated acid rain; 3） a short-time of leaching （ ≤5 d） increased contents of soil exchangeable Ca^2＋ , K^＋ , and the content of Mg^2＋ （when pH was ≤ 3.0） in the soil;however, a long-time of leaching （ ≥ 10 d） did reversely;and the content of soil exchangeable Na^＋ was always decreased no matter how long the leaching time was; and 4） leaching with simulated acid rain, triggered weathering of some soil minerals, thus releasing base ions, and turning some soil exchangeable ions into non-exchangeable ones as well.