不同环境背景下的艾比湖区域土壤水盐差异性特征研究

发布时间：2018-03-15 02:19

本文选题：环境背景　切入点：土壤水盐　出处：《干旱区地理》2017年03期 　论文类型：期刊论文

【摘要】：由于不同的环境背景下环境机制不同,所以导致了水盐(主要指水分、盐分)空间变异存在很大差异,在此背景下分析艾比湖地区含水量与含盐量空间变异,有助于更加合理的了解土壤含水量与含盐量一体化规律。以艾比湖为中心把艾比湖区域分为三个靶区:绿洲、荒漠、湖区,运用统计学方法,分析三个区域的土壤水分、盐分差异性特征。结果表明:绿洲、荒漠、湖区这三个区域表层土壤盐分积聚严重,其含盐量大小依次为:荒漠→绿洲→湖区,而含水量却相反;绿洲、荒漠和湖区土壤含盐量的变异系数均在85%~150%之间,属高强度变异,含水量变异系数均介于55%~75%之间,属中强度变异。说明荒漠区域盐分含量的水平分布不均匀,空间异质性较强;而水分含量的水平相对较为均匀,空间异质性较弱。绿洲、荒漠、湖区土壤层10~20 cm与20~40 cm土壤层含盐量的存在显著性相关性(p0.01),即绿洲的相关系数0.913,荒漠的相关系数0.966,湖区的相关系数0.941,绿洲与湖区土壤表层与亚层含水量存在显著性相关性(p0.01)相关系数分别为0.851和0.908。说明绿洲与湖区土壤层0~10 cm与10~20 cm土壤含水量存在水分转移现象,荒漠区域这种现象不明显,可能与沙漠炎热地表环境和土壤性质等因素有关。研究结果揭示了艾比湖地区不同环境背景下秋季的土壤含水量与含盐量分布特征,为艾比湖地区农作物灌溉管理及土壤盐渍化治理提供了科学依据。
[Abstract]:Because of the difference of environmental mechanism in different environment background, the spatial variation of water and salt (mainly water and salt) is very different. In this background, the spatial variation of water content and salt content in Ebinur Lake area is analyzed. It is helpful to understand the law of the integration of soil water content and salt content more reasonably. The Ebinur Lake region is divided into three target areas: oasis, desert, lake area, using statistical method to analyze the soil moisture of the three regions. The results show that the salt accumulation of surface soil in oasis, desert and lake region is serious, and the salt content is in order of desert. 鈫扥asis. 鈫扵he coefficient of variation of soil salt content in oasis, desert and lake area is between 85% and 150%, which belongs to high intensity variation, and the coefficient of variation of water content is between 55% and 75%. It shows that the horizontal distribution of salt content in desert area is uneven and the spatial heterogeneity is strong, while the level of water content is relatively uniform, and the spatial heterogeneity is relatively weak. There is a significant correlation between the soil salt content of 10 ~ 20 cm and 20 ~ 40 cm of soil layer in the lake area, namely, the correlation coefficient of oasis 0.913, the correlation coefficient of desert 0.966, the correlation coefficient of lake area 0.941, and the soil water content of surface layer and sublayer of oasis and lake region are significant. The correlation coefficients were 0.851 and 0.908, respectively. The results showed that there existed water transfer phenomenon in 0 ~ 10 cm and 10 ~ 20 cm soil water content in oasis and lake area. This phenomenon is not obvious in desert area, which may be related to the hot surface environment and soil properties in desert. The results reveal the distribution characteristics of soil moisture and salt content in autumn under different environmental background in Ebinur Lake area. It provides scientific basis for crop irrigation management and soil salinization control in Ebinur Lake area.
【作者单位】：新疆大学资源与环境科学学院;新疆大学绿洲生态教育部重点实验室;新疆智慧城市与环境建模普通高校重点实验室;
【基金】：国家自然科学基金-新疆本地优秀青年人才培养专项(U1503302)
【分类号】：S152.7

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