ZHANG Lu,HAN Jichang,MA Zenghui,et al.Study on Dynamic Change of Ion Contents of Saline-Alkali Soil During Different Reed Growth Stages[J].Research of Soil and Water Conservation,2016,23(04):38-42.
芦苇不同生育期盐碱土离子含量动态变化研究
- Title:
- Study on Dynamic Change of Ion Contents of Saline-Alkali Soil During Different Reed Growth Stages
- Keywords:
- reed; salinization; potential of hydrogen; electrical conductivity; base ion
- 分类号:
- S151.9+3;S156.4+9
- 摘要:
- 研究芦苇不同生育期盐碱土离子含量的动态变化，为生物措施治理盐碱土壤的应用提供参考。自制水泥圆柱装置，0.8 m（内径）×0.98 m（高度）20个，用陕西定边盐碱土进行填装，一排10个装置分别种植芦苇，另一排10个装置不种植任何作物，采用土钻在芦苇各生育期取每个装置0—20 cm土样，分别测定了芦苇出苗期、展叶期、开花期、成熟期和枯黄期盐碱土pH，电导率，Ca2+，Mg2+，K+，Na+，CO32-，HCO3-，Cl-，SO42-的含量。芦苇在整个生长阶段能促进盐碱土壤的pH值降低0.65个单位，电导率总体下降756.55 μS/cm，Ca2+含量减少138.70 mg/kg，SO42-含量减少115.35 mg/kg，Cl-含量减少57.76 mg/kg，HCO3-含量减少57.76 mg/kg，Na+含量减少55.58 mg/kg，CO32-含量减少31.66 mg/kg，Mg2+含量减少26.93 mg/kg，K+含量减少12.65 mg/kg。盐碱土上种植芦苇比不种植芦苇的土壤pH，电导率，Ca2+，Mg2+，K+，Na+，CO32-，HCO3-，Cl-，SO42-含量均有所降低，芦苇可能存在富集盐分的能力，在一定程度上能改良陕西定边土壤的盐碱化状况。
- Abstract:
- It provides a reference for the application of biological measures to control saline soils to study the dynamic change of ion contents of saline-alkali soil during different reed growth stages. Using the saline-alkali soil in Dingbian County, Shaanxi Province to pack the cement column device [0.8 m(φ)×0.98 m(h), 20 numbers], and planting reeds in 10 columns in a row, not planting any plants in 10 columns in another row, using soil auger to collect 0—20 cm soil sample at each reed growth stage in every column, then saline-alkali soil indexes of potential of hydrogen, electrical conductivity, Ca2+,Mg2+,K+,Na+,CO32-,HCO3-,Cl-,SO42- content were measured during reed seedling, leafing, flowering, maturity and withering period, respecitvely. The results showed that reed could make that the pH lower 0.65 units, the electrical conductivity overall declined 756.55 μS/cm, Ca2+ content decreased 138.70 mg/kg, SO42- content decreased 115.35 mg/kg, Cl- content decreased 57.76 mg/kg, HCO3- content decreased 57.76 mg/kg, Na+ content decreased 55.58 mg/kg, CO32- content decreased 31.66 mg/kg, Mg2+ content decreased 26.93 mg/kg, K+ content decreased 12.65 mg/kg during throughout growing stage. The potential of hydrogen, electrical conductivity, Ca2+,Mg2+,K+,Na+,CO32-,HCO3-,Cl-,SO42- contents of saline-alkali soil with planting reeds decreased more than not planting reeds. The reed capability to enrich salinity might exist, to a certain extent, and can improve the situation of soil salinization in Dingbian County, Shaanxi Province.
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备注/Memo
收稿日期:2015-07-12;改回日期:2015-07-28。
基金项目:陕西省自然科学基础研究计划“土地整治后农用地质量和生态环境在线监测方法研究”（2014JM5213）
作者简介:张露(1987-),女,四川南部人,博士研究生,主要研究土壤物理及其改良。E-mail:luluqiaofeng@126.com
通讯作者:韩霁昌(1968-),男,陕西渭南人,研究员,博士,主要研究土地工程及土地资源利用。E-mail:295120895@qq.com