夏尔希里地区土壤盐分特征分析

为了探明新疆夏尔希里地区土壤盐分特征，采集了该地区绿洲、荒漠、山地3大系统的土壤样品，对土壤总盐，Cl^-，K⁺+Na⁺，CO₃^2-，HCO₃^-，SO₄^2-，Ca²⁺，Mg²⁺离子等指标进行测试。分析结果显示:荒漠区、山区、绿洲区总盐含量分别为2.29～9.45，6.11～8.41，2.32～7.83 g/kg。根据新疆土壤盐碱化的分级标准，3个区域土壤属中度盐化土。夏尔希里地区土壤总盐及各离子含量变异系数均小于1，属于中等变异。总盐含量:荒漠区 > 山地区 > 绿洲区；Cl^-，HCO₃^-，K⁺+Na⁺离子含量:山地区 > 绿洲区 > 荒漠区；CO₃^2-，Mg²⁺离子含量:荒漠区 > 山地区 > 绿洲区；SO₄^2-离子含量:绿洲区 > 山地区 > 荒漠区；Ca²⁺离子含量:荒漠区 > 绿洲区 > 山地区。3个区域的总盐与Cl^-，HCO₃^-，SO₄^2-，Ca²⁺，K⁺+Na⁺离子呈较显著正相关关系。

Analysis on Characteristics of Soil Salt in Xarxili

To prove up the basic characteristic of the soil in Xarxili region in Xinjiang, soil samples in three regions which are in Oasis, desert, mountain were collected, then followed by determining the contents of total salt and ions (Cl^-, K⁺+Na⁺, CO₃^2-, HCO₃^-, SO₄^2-, Ca²⁺, Mg²⁺). The results show that the contents of total salt are 2.29~9.45 g/kg in the desert, 6.11~8.41 g/kg in the mountain, 2.32~7.83 g/kg in the oasis region. According to the classification standard of soil salinization in Xinjiang, the three regions belong to moderate soil salinization. The variation coefficient of soil total salt and eight ions in three regions of Xarxili show moderate variability. The spatial distribution show that the contents of eight ions and total salt are in the order: total salt in the desert > mountain > oasis; Cl^-, HCO₃^-, K⁺+Na⁺ in the mountain > oasis > desert;CO₃^2-, Mg²⁺ in the desert > mountain > oasis;SO₄^2- in the oasis > mountain > desert;Ca²⁺ in the desert > oasis > mountain. The significant positive correlation was found between such pairs as total salt and Cl^-, HCO₃^-, SO₄^2-, Ca²⁺, K⁺+Na⁺.