伊犁察南灌区土壤盐分时空变异特征与运移机理研究

发布时间：2018-03-19 06:29

本文选题：伊犁察南灌区　切入点：盐分运移　出处：《农业机械学报》2017年12期 　论文类型：期刊论文

【摘要】：以伊犁河谷察南灌区为研究区,运用磁感式电导率快速获取技术及室内分析相结合手段,通过构建盐分解译模型,获取2015年及2016年秋季0~30 cm、30~60 cm、60~100 cm土壤盐分含量。对土壤各土层进行了盐渍化分级统计和半方差函数分析及空间插值分析。对研究区高程信息进行提取,并通过调查河流影响范围对河流进行缓冲区分析。旨在构建适用于研究区及同类型灌区磁感式盐渍土地快速精量诊断评估与利用规划技术体系,了解干旱、半干旱区灌溉农田土盐时空变异特征,并对土盐时空运移机理进行研究。初步研究表明,相比于2015年秋季,2016年秋季研究区非盐化土面积显著减小,中度盐化土面积显著增加,非盐化土、轻度盐化土呈现向中度盐化土演变的趋势;研究区土壤盐分呈现向中部及东部区域运移的趋势,盐化土面积增加,且盐分含量均值增大;另外,在空间大尺度范围上,河流是影响土盐运移的主要影响因素,在局域小尺度范围内,地势是影响土盐运移的主要影响因素。
[Abstract]:In this paper, a salt interpretation model is constructed by using the rapid acquisition of magnetic conductivity and indoor analysis in Chanan Irrigation area of Yili River Valley. In 2015 and 2016, the soil salt content of 0 ~ 30 cm ~ 30 ~ 60 cm ~ (-1) ~ 60 cm ~ (-1) ~ 100 cm soil was obtained. The soil salinization classification statistics, semi-variance function analysis and spatial interpolation analysis were carried out, and the height information of the study area was extracted. By investigating the river influence range, the buffer zone of the river is analyzed. The purpose of this paper is to construct a rapid accurate diagnostic evaluation and utilization planning system for magnetically sensitive saline land in the study area and the same type of irrigation area, so as to understand the drought. The temporal and spatial variation characteristics of soil salt in irrigated farmland in semi-arid region were studied. The preliminary study showed that the area of non-salinized soil decreased significantly and the area of moderate salinized soil increased significantly in the autumn of 2016 compared with the autumn of 2015. In non-salinized soil, mild salinized soil showed a trend of evolution to moderate salinized soil; soil salinity in the study area showed a trend of migration to the central and eastern regions, the area of salinized soil increased and the mean value of salt content increased; in addition, In the large scale range, the river is the main influence factor to the soil salt migration, and the topography is the main influence factor to the soil salt movement in the local small scale range.
【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;中国科学院大学资源与环境学院;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厅科技计划项目(201531116) 新疆优秀青年科技人才培养项目(qn2015yx033) 国家自然科学基金项目(U1403182)
【分类号】：S156.41

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