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根据联合国粮农组织推荐的方法估算参考作物蒸发蒸腾量(ET0)需要具备一定的气象资料,而使用另一种方法,即蒸发计估测ET0,可以减少基于作物蒸发蒸腾量制定灌溉制度的工作量,并且降低其复杂度。在叙述蒸发计构造及使用方法的基础上,介绍了一些研究者在不同气候条件下对蒸发计估测ET0准确度的试验研究。试验表明,在缺乏标准气象资料时,可以利用蒸发计来可靠地估测农场或更广阔领域的ET0。
Estimating reference crop evapotranspiration (ET0) based on the methodology recommended by the Food and Agriculture Organization of the United Nations requires some meteorological data, and using another method, ET0 estimation by evapotranspiration, can reduce the effort required to establish an irrigation schedule based on crop evapotranspiration , And reduce its complexity. Based on the description of the structure and the method of using the evaporation meter, some researches on the estimation of the ET0 accuracy of the evaporation meter under different climatic conditions are introduced. Experiments have shown that in the absence of standard meteorological data, evapotimeters can be used to reliably estimate ET0 on farms or in the wider area.