中文摘要：

为寻找适合滴灌农田土壤平均含水率的计算方法,在裸地和大田试验研究的基础上选用单点平均、三点平均等5种方法分别计算了滴灌条件下平均土壤含水率,并以积分法为标准,对其他4种方法进行评价。结果表明,3点取样,采用面积加权平均法计算各层土壤的平均含水率,然后在垂直方向上采用积分中值定理求平均值的方法计算结果更接近真实值,误差最小,可利用该方法计算滴灌农田土壤平均含水率。

英文摘要：

It is particularly important to find accurate calculation method of soil moisture content under drip irrigation.Based on the data from experiments of field and bare land,average moisture content of field of drip irrigation under different moisture was estimated with five methods,such as 1 sampling point average and 3 sampling points average etc.Taking method of layered integration as the standard,the other methods were evaluated.The results showed that the estimated average soil moisture by the F4（three sampling points selected,averaging of each layer by area weighted method,then averaging in vertical direction with integral weighted method） were closer to the values estimated by layered integration method at the vertical profile based on mass data.Therefore,it was concluded that the F4 could replace the used to calculate average soil moisture content under drip irrigation.