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中文摘要：
介绍了土壤水分／盐分／温度测量仪（Hydra）和车载式土壤pH-EC勘测系统（v-pH-EC）的基本情况、仪器组成和测量原理，并将该2种仪器应用于内蒙古河套灌区沙壕渠灌域以检验仪器的应用效果，揭示了土壤电导率与土壤含水率的关系，并建立了一套以仪器监测数据作为输入参数的土壤盐分预报模型。结果表明，土壤电导率与土壤含水率呈良好的乘幂函数关系，建立的土壤水盐预报模型可获得针对不同尺度采样要求的土壤水盐状况。
英文摘要：
The basic principle and components of Hydra and V-pH-EC were introduced, the two instruments were applied to Shahaoqu irrigation district in Hetao irrigation area in order to verify the accuracy, the relationship was revealed between soil EC and soil water content, and the soil water-salt forecasting models were established with the data by Hydra and V-pH-EC as input parameters. The results indicated that there was a good power function between soil EC and soil water content, and the established models could obtain the data of soil EC and soil water content for sampling in different scales.
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