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随着经济社会的发展,对土壤性质进行时间与空间的监测研究对农业发展和环境保护显得尤为重要,而通过地球物理方法可以对土壤进行原位自动监测。基于温纳法自主开发了一套土壤盐渍化原位、长期监测系统,并利用该系统在潍坊昌邑海洋自然保护区进行了原位测试。通过分析土壤电阻率的变化可以对土壤的水盐运移过程进行辨识,对土壤盐渍化过程进行监测、评估、预测,从而为盐渍区域的修复与可持续利用提供参考信息。监测数据表明,监测区域水盐由下自上运移强烈,容易发展为表聚型盐渍土。在降雨过程中,由于雨水淋洗作用,土壤剖面盐分重新分布。淋洗后表层土壤脱盐现象及下部区域盐峰下移过程明显,土壤剖面0~10 cm处为脱盐区域,10~35 cm处为盐峰下移区域。
With the development of economy and society, time and space monitoring research on soil properties is particularly important for agricultural development and environmental protection. Geophysical methods can be used to monitor the soil in situ automatically. A set of in-situ and long-term monitoring system for soil salinization was independently developed based on Wenner’s method. In-situ testing was conducted in Changyi Marine Nature Reserve, Weifang. By analyzing the change of soil resistivity, the process of soil water and salt transport can be identified, and the process of soil salinization can be monitored, evaluated and predicted, which can provide reference information for the restoration and sustainable utilization of saline area. The monitoring data show that the water and salt in the monitoring area are easily transported from top to bottom and easily developed into polygalacturons. During raining, salinity was re-distributed in the soil profile due to rainwater leaching. The surface soil desalination phenomenon and the downward shift of the salt peak in the lower part of the soil after rinsing were obvious. The desalted area was 0-10 cm in the soil profile and the descending area of salt peak at 10-35 cm.