中文摘要：

针对当前土壤含水量测量装置结构复杂、测量稳定时间长、成本造价高以及传感器间一致性差等问题,对土壤水分蒸发过程与土壤含水量之间的关系进行了理论分析。基于对近土壤区域空气相对湿度的测量,在彭曼蒙特斯公式基础上提出了一种土壤含水率估计模型,并设计制作了集温度、光照强度及土壤含水量测量为一体的测试系统进行实验验证。实验表明,测试结果与称重法得到的实际含水量具有较高的一致性,且该测试具有响应速度快、成本低等优势。

英文摘要：

Aiming at the problems that current soil moisture measurement devices have the disadvantages of high complexity,long settling time,prohibitive cost,poor consistency among the sensors and so on. The relationship between the soil water evaporation and soil moisture is analyzed theoretically. Based on the measurement of the air relative humidity in near-soil area,a soil moisture estimation model is put forward according to the Penman Monteith formula. A measurement system integrating temperature,light intensity and soil moisture tests was designed and developed,and the experiment was carried out to verify the effectiveness of the model. Experiment result shows that the test results have great consistency with the actual moisture acquired with the weighing method; and the proposed test method has the advantages of fast response speed and low cost.