中文摘要：

通过田间试验,使用时域反射仪（TDR）、蒸发皿（E601型和D15.6型）分别测定日光温室膜下滴灌番茄的实际需水量和水面蒸发量,分析了实测需水量与水面蒸发量的关系,建立了水面蒸发法需水量计算模型,并检验其适用性。结果表明,温室内作物需水量与水面蒸发量存在良好的线性关系。基于E601型、D15.6型蒸发皿的温室内作物需水量计算模型的相对误差分别为0.293、0.336,中误差分别为0.926、0.790。以D15.6型蒸发皿的蒸发量估测作物需水量为宜。

英文摘要：

Through field experiments, actual waler requirement of tomato and water surface evaporation in sunlight greenhouse were measured respectively by the Time Domain Reflectometry and two kinds of evaporating dish （E601 and D15.6）. The relationship between actual water requirement and water surface evaporation was analyzed, the water requirement model by water surface evaporation method was established and its applicability was verified. The results indicated that there was a good linear relationship between actual water requirement and water surface evaporation. The relative errors were 0. 293 and 0. 336, mean square errors were 0. 926 and 0. 790 for water requirement models in greenhouse based on D15.6 and E601 evaporating dishes, respectively. It is recommended that crop water requirement should be estimated by the evaporation of D15.6 dish.