青岛自动土壤水分对比观测分析评估

根据《自动土壤水分观测准确性研究》理论,对青岛六个区市2011年度土壤水分对比观测实验数据进行分析评估,发现在土壤质地、结构比较均匀地段,自动土壤水分观测经订正可以替代人工观测土壤水分。土壤容重综合修正法比简化直线回归法适宜性和效果均好,方法简便,物理意义清晰。简化直线回归法体积含水率平均绝对误差小于5%,不能保证重量含水率平均绝对误差也小于5%,不能仅以体积含水率平均绝对误差小于5%作为判断标准。

Assessment of Comparative Observation for Automatic Soil Moisture at Qsingdao

Based on the theory of ＂Accuracy Study for automatic soil moisture observation＂,comparative observations for soil moisture are analyzed at six regions of Qingdao in 2011.The automatic observation of soil moisture after the correction can be used instead of manual observation on the area of even soil texture and structure. The method of soil bulk density is better than the method of simplified linear regression in the aspect of suitability and accuracy.The method of synthetic correction has clear physical concept. On the other hand,the average absolute error of volume moisture content with the method of simplified linear regression is less than 5% and can not guarantee the average absolute error of weight moisture content is also less than 5%.So the average absolute error of volume moisture content less than 5% can not be regarded as the only one judgment.