新疆伊犁察南灌区土壤盐分特征

发布时间：2018-04-21 05:51

本文选题：土壤盐渍化 + 伊犁河谷　；参考：《土壤》2017年05期

【摘要】：以察南灌区土壤为研究对象,对不同含盐量土壤进行盐化程度分级,并对该地区土壤盐分特征进行相关分析和主成分分析,以及对土壤盐分因子区域影响因素进行探讨。结果表明:察南灌区以碱性土壤为主,HCO_3~ 是影响该灌区土壤p H最强的因子;对灌区0~100 cm土体土壤的分析表明,灌区盐化土面积约为总灌溉面积的1/4,盐渍化风险较大;相关性分析显示,HCO 3、Cl~ 、SO_4~(2-)、Ca~(2~+)、Mg~(2~+)、Na~+、K~+为盐分主要组成离子,总盐分与各离子之间均呈正相关关系,与总盐分相关性最强的阴离子为SO_4~(2-),相关性最强的阳离子为Mg~(2~+);主成分分析显示,HCO_3~ 、Cl~ 、K~+为影响该灌区土壤盐分特征的主导因子;通过盐分因子区域影响因素定性分析可知,除HCO_3~ 和pH是由河流以及地下水综合作用影响外,其他盐分因子均主要受河流影响。
[Abstract]:Taking the soil of Chanan Irrigation area as the research object, the salinization degree of the soils with different salt contents was classified, and the correlation analysis and principal component analysis of the soil salinity characteristics in this area, as well as the regional factors affecting the soil salt content were discussed. The results showed that alkaline soil was the main factor affecting soil pH in Chanan Irrigation area, and the salinized soil area was about 1 / 4 of the total irrigation area, and the risk of salinization was higher. The correlation analysis showed that HCO ~ 3Cl ~ + O _ 4 / C _ 4 / C _ (2) C _ (2) C _ (2) C _ (2) O _ (2) O _ (2) O _ (2) O _ (2) K ~ + was the main salt component ion, and there was a positive correlation between the total salt and each ion, and the relationship between the total salt and the total salt was positive. The anion with the strongest correlation with total salt is so _ 4C _ 2-O, and the most relevant cationic is mg ~ (2 +), the principal component analysis shows that HCO3 ~ + Cl ~ + K ~ ~ is the dominant factor affecting the soil salinity in this irrigated area, and the qualitative analysis of the influencing factors of salt content in the region shows that, Except that HCO _ 3 and pH are influenced by river and groundwater, the other salt factors are mainly affected by river.
【作者单位】：中国科学院新疆生态与地理研究所荒漠与绿洲生态国家重点实验室;中国科学院大学;中国科学院南京土壤研究所;新疆国土资源规划研究院;
【基金】：新疆维吾尔自治区科技计划项目(201531116) 新疆优秀青年科技人才培养项目(qn2015yx033)资助
【分类号】：S156.4

【相似文献】