用Priestley-Taylor模式计算棉田实际蒸散量的研究

CALCULATION OF ACTUAL EVAPOTRANSPIRATION FOR COTTON FIELD BY MEANS OF THE PRIESTLEY—TAYLOR MODEL

在农田蒸散试验资料的基础上，综合考虑影响棉田实际蒸散的气象条件，棉花生物学特性和土壤水分等因素，利用Ｐｒｉｅｓｔｌｅｙ－Ｔａｙｌｏｒ模式、棉花叶面积指数和相对有效土壤湿度建立了棉田实际蒸散量的计算模式．该模式仅需常规气象和农业气象资料，具有较高的精度，便于在干旱区推广使用．

Based on the experimental data of evapotranspiration in the field, considering the meteorological conditions, cotton biological properties and soil moisture state, a calculation model for actual evapotranspiration of cotton field is developed by means of the PriestleyTaylor model, cotton leaf area index and relative effective soil moisture. The routine meteorological and agrometeorological data would be only needed to calculate the evapotranspiration by using the model, and there is a good precision. It can be used in arid area in China easily.